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2. Quantifying uncertainty in spatio-temporal changes of upper-ocean heat content estimates: an internationally coordinated comparison

Author

Savita, Abhishek, Domingues, Catia M., Boyer, Tim, Gouretski, Viktor, Ishii, Masayoshi, Johnson, Gregory C., Lyman, John M., Willis, Josh K., Marsland, Simon J., Hobbs, William, Church, John A., Monselesan, Didier P., Dobrohotoff, Peter, Cowley, Rebecca, and Wijffels, Susan E.

Subjects
Physics - Atmospheric and Oceanic Physics
Abstract

The Earth system is accumulating energy due to human-induced activities. More than 90 percent of this energy has been stored in the ocean as heat since 1970, with about 64 percent of that in the upper 700 m. Differences in upper ocean heat content anomaly (OHCA) estimates, however, exist. Here, we evaluate spread in upper OHCA estimates arising from choices in instrumental bias corrections and mapping methods, in addition to the effect of using a common ocean mask. The same dataset was mapped by six research groups for 1970 to 2008, with six instrumental bias corrections applied to expendable bathythermograph (XBT) data. We find that use of a common ocean mask may impact estimation of global OHCA by +- 13 percent. Uncertainty due to mapping method dominates over XBT bias correction at a global scale and is largest in the Indian Ocean and in the eddy-rich and frontal regions of all basins. Uncertainty due to XBT bias correction is largest in the Pacific Ocean within 30N to 30S. In both mapping and XBT cases, spread is higher since the 1990s. Important differences in spatial trends among mapping methods are found in the well-observed Northwest Atlantic and the poorly-observed Southern Ocean. Although our results cannot identify the best mapping or bias correction schemes, they identify where and when greater uncertainties exist, and so where further refinements may yield the largest improvements. Our results highlight the need for a future international coordination to evaluate performance of existing mapping methods., Comment: Submitted to AMS Journal of Climate (30 July 2020). Feedback welcome. Please email: abhishek.abhisheksavita@utas.edu.au

Published
2020

3. Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean

Author

Rignot, Eric, An, Lu, Chauche, Nolwenn, Morlighem, Mathieu, Jeong, Seongsu, Wood, Michael, Mouginot, Jeremie, Willis, Josh K, Klaucke, Ingo, Weinrebe, Wilhelm, and Muenchow, Andreas

Subjects
Climate Action, bathymetry, glaciology, Greenland, mass balance, physical ocean, sea level, Meteorology & Atmospheric Sciences
Abstract

Humboldt Gletscher is a 100-km wide, slow-moving glacier in north Greenland which holds a 19-cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi-beam echo sounding data collected in 2019 indicate a seabed 200 m deeper than previously known. Conductivity temperature depth data reveal the presence of warm water of Atlantic origin at 0°C at the glacier front and a warming of the ocean waters by 0.9 ± 0.1°C since 1962. Using an ocean model, we reconstruct grounded ice undercutting by the ocean, combine it with calculated retreat caused by ice thinning to floatation, and are able to fully explain the observed retreat. Two thirds of the retreat are caused by undercutting of grounded ice, which is a physical process not included in most ice sheet models.

Published
2021

4. Ocean melting of the Zachariae Isstrøm and Nioghalvfjerdsfjorden glaciers, northeast Greenland

Author

An, Lu, Rignot, Eric, Wood, Michael, Willis, Josh K, Mouginot, Jérémie, and Khan, Shfaqat A

Subjects
Climate Action, Life Below Water, Greenland, glaciology, sea level, ice-ocean interaction, climate, ice–ocean interaction
Abstract

Zachariae Isstrøm (ZI) and Nioghalvfjerdsfjorden (79N) are marine-terminating glaciers in northeast Greenland that hold an ice volume equivalent to a 1.1-m global sea level rise. ZI lost its floating ice shelf, sped up, retreated at 650 m/y, and experienced a 5-gigaton/y mass loss. Glacier 79N has been more stable despite its exposure to the same climate forcing. We analyze the impact of ocean thermal forcing on the glaciers. A three-dimensional inversion of airborne gravity data reveals an 800-m-deep, broad channel that allows subsurface, warm, Atlantic Intermediate Water (AIW) (+1.[Formula: see text]C) to reach the front of ZI via two sills at 350-m depth. Subsurface ocean temperature in that channel has warmed by 1.3[Formula: see text]C since 1979. Using an ocean model, we calculate a rate of ice removal at the grounding line by the ocean that increased from 108 m/y to 185 m/y in 1979-2019. Observed ice thinning caused a retreat of its flotation line to increase from 105 m/y to 217 m/y, for a combined grounding line retreat of 13 km in 41 y that matches independent observations within 14%. In contrast, the limited access of AIW to 79N via a narrower passage yields lower grounded ice removal (53 m/y to 99 m/y) and thinning-induced retreat (27 m/y to 50 m/y) for a combined retreat of 4.4 km, also within 12% of observations. Ocean-induced removal of ice at the grounding line, modulated by bathymetric barriers, is therefore a main driver of ice sheet retreat, but it is not incorporated in most ice sheet models.

Published
2021

5. Ocean forcing drives glacier retreat in Greenland.

Author

Wood, Michael, Rignot, Eric, Fenty, Ian, An, Lu, Bjørk, Anders, van den Broeke, Michiel, Cai, Cilan, Kane, Emily, Menemenlis, Dimitris, Millan, Romain, Morlighem, Mathieu, Mouginot, Jeremie, Noël, Brice, Scheuchl, Bernd, Velicogna, Isabella, Willis, Josh K, and Zhang, Hong

Subjects
Climate Action
Abstract

The retreat and acceleration of Greenland glaciers since the mid-1990s have been attributed to the enhanced intrusion of warm Atlantic Waters (AW) into fjords, but this assertion has not been quantitatively tested on a Greenland-wide basis or included in models. Here, we investigate how AW influenced retreat at 226 marine-terminating glaciers using ocean modeling, remote sensing, and in situ observations. We identify 74 glaciers in deep fjords with AW controlling 49% of the mass loss that retreated when warming increased undercutting by 48%. Conversely, 27 glaciers calving on shallow ridges and 24 in cold, shallow waters retreated little, contributing 15% of the loss, while 10 glaciers retreated substantially following the collapse of several ice shelves. The retreat mechanisms remain undiagnosed at 87 glaciers without ocean and bathymetry data, which controlled 19% of the loss. Ice sheet projections that exclude ocean-induced undercutting may underestimate mass loss by at least a factor of 2.

Published
2021

6. Consistent Seasonal Hydrography From Moorings at Northwest Greenland Glacier Fronts.

Author

Zahn, Marie J., Laidre, Kristin L., Simon, Malene, Stafford, Kathleen M., Wood, Michael, Willis, Josh K., Phillips, Elizabeth M., and Fenty, Ian

Subjects
VERTICAL mixing (Earth sciences), ICE sheet thawing, SEASONAL temperature variations, SEA ice, ICE sheets, MELTWATER, GLACIERS
Abstract

Greenland's marine‐terminating glaciers connect the ice sheet to the ocean and provide a critical boundary where heat, freshwater, and nutrient exchanges take place. Buoyant freshwater runoff from inland ice sheet melt is discharged at the base of marine‐terminating glaciers, forming vigorous upwelling plumes. It is understood that subglacial plumes modify waters near glacier fronts and increase submarine glacier melt by entraining warm ambient waters at depth. However, ocean observations along Greenland's coastal margins remain biased toward summer months which limits accurate estimation of ocean forcing on glacier retreat and acceleration. Here, we fill a key observational gap in northwest Greenland by describing seasonal hydrographic variation at glacier fronts in Melville Bay using in situ observations from moorings deployed year‐round, CTDs, and profiling floats. We evaluated local and remote forcing using remote sensing and reanalysis data products alongside a high‐resolution ocean model. Analysis of the year‐round hydrographic data revealed consistent above‐sill seasonality in temperature and salinity. The warmest, saltiest waters occurred in spring (April–May) and primed glaciers for enhanced submarine melt in summer when meltwater plumes entrain deep waters. Waters were coldest and freshest in early winter (November–December) after summer melt from sea ice, glacier ice, and icebergs provided cold freshwater along the shelf. Ocean variability was greatest in the summer and fall, coincident with increased freshwater runoff and large wind events before winter sea ice formation. Results increase our mechanistic understanding of Greenland ice‐ocean interactions and enable improvements in ocean model parameterization. Plain Language Summary: Many of Greenland's glaciers terminate in the ocean and form an important boundary between coastal waters and the ice sheet. During summer months, meltwater from the ice sheet flows out below glaciers that terminate in the ocean. The less‐dense meltwater rises to the surface as a plume, increasing near‐glacier ocean mixing and submarine glacier melt. Understanding processes at the glacier‐ocean interface, including how plumes modify nearshore waters, requires sustained observations near glacier termini. However, ocean measurements are largely taken during the summer and do not necessarily represent the total variability observed in the system. Here, we fill an important knowledge gap by presenting year‐round measurements of temperature and salinity near glacier fronts in Northwest Greenland. We found the warmest, saltiest waters in the spring and coldest, freshest waters in early winter at all sites. Warm waters in the spring prime deep glaciers for submarine melt during summer. Increased winds in the fall initiated vertical mixing in nearshore waters before winter sea ice created a surface barrier, stabilizing the water column. Results advance our understanding of the ocean's role in the acceleration and retreat of Greenland's glaciers, which is important for estimating large‐scale ocean circulation and Greenland's ice sheet mass loss. Key Points: Moored hydrographic observations at glacier fronts in NW Greenland revealed consistent above‐sill seasonality in temperature and salinityOcean temperatures reached a maximum in spring, priming deep glaciers for submarine melt during summerRemote forcing supplied the renewal of warm, salty water in the spring and local forcing controlled increased variability in the summer/fall [ABSTRACT FROM AUTHOR]

Published
2024
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16. Global Oceans, BAMS State of the Climate in 2021, Chapter 3

Author

Johnson, Gregory C., Lumpkin, Rick, Boyer, Tim, Bringas, Francis, Cetinić, Ivona, Chambers, Don P., Cheng, Lijing, Dong, Shenfu, Feely, Richard A., Fox-Kemper, Baylor, Frajka-Williams, Eleanor, Franz, Bryan A., Fu, Yao, Gao, Meng, Garg, Jay, Gilson, John, Goni, Gustavo, Hamlington, Benjamin D., Hewitt, Helene T., Hobbs, William R., Hu, Zeng-Zhen, Huang, Boyin, Jevrejeva, Svetlana, Johns, William E., Katsunari, Sato, Kennedy, John J., Kersalé, Marion, Killick, Rachel E., Leuliette, Eric, Locarnini, Ricardo, Lozier, M. Susan, Lyman, John M., Merrifield, Mark A., Mishonov, Alexey, Mitchum, Gary T., Moat, Ben I., Nerem, R. Steven, Notz, Dirk, Perez, Renellys C., Purkey, Sarah G., Rayner, Darren, Reagan, James, Schmid, Claudia, Siegel, David A., Smeed, David A., Stackhouse, Paul W., Sweet, William, Thompson, Philip R., Volkov, Denis L., Wanninkhof, Rik, Weller, Robert A., Wen, Caihong, Westberry, Toby K., Widlansky, Matthew J., Willis, Josh K., Yu, Lisan, and Zhang, Huai-Min

Abstract

Patterns of variability in ocean properties are often closely related to large-scale climate pattern indices, and 2021 is no exception. The year 2021 started and ended with La Niña conditions, charmingly dubbed a “double-dip” La Niña. Hence, stronger-than-normal easterly trade winds in the tropical south Pacific drove westward surface current anomalies in the equatorial Pacific; reduced sea surface temperature (SST) and upper ocean heat content in the eastern tropical Pacific; increased sea level, upper ocean heat content, and salinity in the western tropical Pacific; resulted in a rim of anomalously high chlorophyll-a (Chla) on the poleward and westward edges of the anomalously cold SST wedge in the eastern equatorial Pacific; and increased precipitation over the Maritime Continent. The Pacific decadal oscillation remained strongly in a negative phase in 2021, with negative SST and upper ocean heat content anomalies around the eastern and equatorial edges of the North Pacific and positive anomalies in the center associated with low Chla anomalies. The South Pacific exhibited similar patterns. Fresh anomalies in the northeastern Pacific shifted towards the west coast of North America. The Indian Ocean dipole (IOD) was weakly negative in 2021, with small positive SST anomalies in the east and nearly-average anomalies in the west. Nonetheless, upper ocean heat content was anomalously high in the west and lower in the east, with anomalously high freshwater flux and low sea surface salinities (SSS) in the east, and the opposite pattern in the west, as might be expected during a negative phase of that climate index. In the Atlantic, the only substantial cold anomaly in SST and upper ocean heat content persisted east of Greenland in 2021, where SSS was also low, all despite the weak winds and strong surface heat flux anomalies into the ocean expected during a negative phase of the North Atlantic Oscillation. These anomalies held throughout much of 2021. An Atlantic and Benguela Niño were both evident, with above-average SST anomalies in the eastern equatorial Atlantic and the west coast of southern Africa. Over much of the rest of the Atlantic, SSTs, upper ocean heat content, and sea level anomalies were above average. Anthropogenic climate change involves long-term trends, as this year’s chapter sidebars emphasize. The sidebars relate some of the latest IPCC ocean-related assessments (including carbon, the section on which is taking a hiatus from our report this year). This chapter estimates that SST increased at a rate of 0.16–0.19°C decade−1 from 2000 to 2021, 0–2000-m ocean heat content warmed by 0.57–0.73 W m−2 (applied over Earth’s surface area) from 1993 to 2021, and global mean sea level increased at a rate of 3.4 ± 0.4 mm yr−1 from 1993 to 2021. Global mean SST, which is more subject to interannual variations than ocean heat content and sea level, with values typically reduced during La Niña, was ~0.1°C lower in 2021 than in 2020. However, from 2020 to 2021, annual average ocean heat content from 0 to 2000 dbar increased at a rate of ~0.95 W m−2, and global sea level increased by ~4.9 mm. Both were the highest on record in 2021, and with year-on-year increases substantially exceeding their trend rates of recent decades.

Published
2022
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17. Global Oceans

Author

Johnson, Gregory C., primary, Lumpkin, Rick, additional, Boyer, Tim, additional, Bringas, Francis, additional, Cetinić, Ivona, additional, Chambers, Don P., additional, Cheng, Lijing, additional, Dong, Shenfu, additional, Feely, Richard A., additional, Fox-Kemper, Baylor, additional, Frajka-Williams, Eleanor, additional, Franz, Bryan A., additional, Fu, Yao, additional, Gao, Meng, additional, Garg, Jay, additional, Gilson, John, additional, Goni, Gustavo, additional, Hamlington, Benjamin D., additional, Hewitt, Helene T., additional, Hobbs, William R., additional, Hu, Zeng-Zhen, additional, Huang, Boyin, additional, Jevrejeva, Svetlana, additional, Johns, William E., additional, Katsunari, Sato, additional, Kennedy, John J., additional, Kersalé, Marion, additional, Killick, Rachel E., additional, Leuliette, Eric, additional, Locarnini, Ricardo, additional, Lozier, M. Susan, additional, Lyman, John M., additional, Merrifield, Mark A., additional, Mishonov, Alexey, additional, Mitchum, Gary T., additional, Moat, Ben I., additional, Nerem, R. Steven, additional, Notz, Dirk, additional, Perez, Renellys C., additional, Purkey, Sarah G., additional, Rayner, Darren, additional, Reagan, James, additional, Schmid, Claudia, additional, Siegel, David A., additional, Smeed, David A., additional, Stackhouse, Paul W., additional, Sweet, William, additional, Thompson, Philip R., additional, Volkov, Denis L., additional, Wanninkhof, Rik, additional, Weller, Robert A., additional, Wen, Caihong, additional, Westberry, Toby K., additional, Widlansky, Matthew J., additional, Willis, Josh K., additional, Yu, Lisan, additional, and Zhang, Huai-Min, additional

Published
2022
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18. Quantifying Spread in Spatiotemporal Changes of Upper-Ocean Heat Content Estimates: An Internationally Coordinated Comparison

Author

Savita, Abhishek, Domingues, Catia M., Boyer, Tim, Gouretski, Viktor, Ishii, Masayoshi, Johnson, Gregory C., Lyman, John M., Willis, Josh K., Marsland, Simon J., Hobbs, William, Church, John A., Monselesan, Didier P., Dobrohotoff, Peter, Cowley, Rebecca, Wijffels, Susan E., Savita, Abhishek, Domingues, Catia M., Boyer, Tim, Gouretski, Viktor, Ishii, Masayoshi, Johnson, Gregory C., Lyman, John M., Willis, Josh K., Marsland, Simon J., Hobbs, William, Church, John A., Monselesan, Didier P., Dobrohotoff, Peter, Cowley, Rebecca, and Wijffels, Susan E.

Abstract

The Earth system is accumulating energy due to human-induced activities. More than 90% of this energy has been stored in the ocean as heat since 1970, with similar to 60% of that in the upper 700 m. Differences in upper-ocean heat content anomaly (OHCA) estimates, however, exist. Here, we use a dataset protocol for 1970-2008-with six instrumental bias adjustments applied to expendable bathythermograph (XBT) data, and mapped by six research groups-to evaluate the spatiotemporal spread in upper OHCA estimates arising from two choices: 1) those arising from instrumental bias adjustments and 2) those arising from mathematical (i.e., mapping) techniques to interpolate and extrapolate data in space and time. We also examined the effect of a common ocean mask, which reveals that exclusion of shallow seas can reduce global OHCA estimates up to 13%. Spread due to mapping method is largest in the Indian Ocean and in the eddy-rich and frontal regions of all basins. Spread due to XBT bias adjustment is largest in the Pacific Ocean within 30 degrees N-30 degrees S. In both mapping and XBT cases, spread is higher for 1990-2004. Statistically different trends among mapping methods are found not only in the poorly observed Southern Ocean but also in the well-observed northwest Atlantic. Our results cannot determine the best mapping or bias adjustment schemes, but they identify where important sensitivities exist, and thus where further understanding will help to refine OHCA estimates. These results highlight the need for further coordinated OHCA studies to evaluate the performance of existing mapping methods along with comprehensive assessment of uncertainty estimates.

Published
2022
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24. Quantifying Spread in Spatiotemporal Changes of Upper-Ocean Heat Content Estimates: An Internationally Coordinated Comparison

Author

Savita, Abhishek, primary, Domingues, Catia M., additional, Boyer, Tim, additional, Gouretski, Viktor, additional, Ishii, Masayoshi, additional, Johnson, Gregory C., additional, Lyman, John M., additional, Willis, Josh K., additional, Marsland, Simon J., additional, Hobbs, William, additional, Church, John A., additional, Monselesan, Didier P., additional, Dobrohotoff, Peter, additional, Cowley, Rebecca, additional, and Wijffels, Susan E., additional

Published
2022
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26. Ocean forcing drives glacier retreat in Greenland

Author

Sub Dynamics Meteorology, Sub Mathematical Modeling, Marine and Atmospheric Research, Wood, Michael, Rignot, Eric, Fenty, Ian, An, Lu, Bjørk, Anders, van den Broeke, Michiel, Cai, Cilan, Kane, Emily, Menemenlis, Dimitris, Millan, Romain, Morlighem, Mathieu, Mouginot, Jeremie, Noël, Brice, Scheuchl, Bernd, Velicogna, Isabella, Willis, Josh K., Zhang, Hong, Sub Dynamics Meteorology, Sub Mathematical Modeling, Marine and Atmospheric Research, Wood, Michael, Rignot, Eric, Fenty, Ian, An, Lu, Bjørk, Anders, van den Broeke, Michiel, Cai, Cilan, Kane, Emily, Menemenlis, Dimitris, Millan, Romain, Morlighem, Mathieu, Mouginot, Jeremie, Noël, Brice, Scheuchl, Bernd, Velicogna, Isabella, Willis, Josh K., and Zhang, Hong

Published
2021

27. Quantifying spread in spatiotemporal changes of upper-ocean heat content estimates: An internationally coordinated comparison

Author

Savita, Abhishek, Domingues, Catia M., Boyer, Tim, Gouretski, Viktor, Ishii, Masayoshi, Johnson, Gregory C., Lyman, John M., Willis, Josh K., Marsland, Simon J., Hobbs, William, Church, John A., Monselesan, Didier P., Dobrohotoff, Peter, Cowley, Rebecca, Wijffels, Susan E., Savita, Abhishek, Domingues, Catia M., Boyer, Tim, Gouretski, Viktor, Ishii, Masayoshi, Johnson, Gregory C., Lyman, John M., Willis, Josh K., Marsland, Simon J., Hobbs, William, Church, John A., Monselesan, Didier P., Dobrohotoff, Peter, Cowley, Rebecca, and Wijffels, Susan E.

Abstract

The Earth system is accumulating energy due to human-induced activities. More than 90% of this energy has been stored in the ocean as heat since 1970, with ∼60% of that in the upper 700 m. Differences in upper-ocean heat content anomaly (OHCA) estimates, however, exist. Here, we use a dataset protocol for 1970–2008—with six instrumental bias adjustments applied to expendable bathythermograph (XBT) data, and mapped by six research groups—to evaluate the spatiotemporal spread in upper OHCA estimates arising from two choices: 1) those arising from instrumental bias adjustments and 2) those arising from mathematical (i.e., mapping) techniques to interpolate and extrapolate data in space and time. We also examined the effect of a common ocean mask, which reveals that exclusion of shallow seas can reduce global OHCA estimates up to 13%. Spread due to mapping method is largest in the Indian Ocean and in the eddy-rich and frontal regions of all basins. Spread due to XBT bias adjustment is largest in the Pacific Ocean within 30°N–30°S. In both mapping and XBT cases, spread is higher for 1990–2004. Statistically different trends among mapping methods are found not only in the poorly observed Southern Ocean but also in the well-observed northwest Atlantic. Our results cannot determine the best mapping or bias adjustment schemes, but they identify where important sensitivities exist, and thus where further understanding will help to refine OHCA estimates. These results highlight the need for further coordinated OHCA studies to evaluate the performance of existing mapping methods along with comprehensive assessment of uncertainty estimates.

Published
2021

28. Robust warming of the global upper ocean

Author

Lyman, John M., Good, Simon A., Gouretski, Viktor V., Ishii, Masayoshi, Johnson, Gregory C., Palmer, Matthew D., Smith, Doug M., and Willis, Josh K.

Subjects
Global warming -- Research, Ocean temperature -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

A large (~[10.sup.23] J) multi-decadal globally averaged warming signal in the upper 300 m of the world's oceans was reported roughly a decade ago (1) and is attributed to warming associated with anthropogenic greenhouse gases (2,3). The majority of the Earth's total energy uptake during recent decades has occurred in the upper ocean (3), but the underlying uncertainties in ocean warming are unclear, limiting our ability to assess closure of sea-level budgets (4-7), the global radiation imbalance (8) and climate models (5). For example, several teams have recently produced different multi-year estimates of the annually averaged global integral of upper-ocean heat content anomalies (hereafter OHCA curves) or, equivalently, the thermosteric sea-level rise (5,9-16). Patterns of inter-annual variability, in particular, differ among methods. Here we examine several sources of uncertainty that contribute to differences among OHCA curves from 1993 to 2008, focusing on the difficulties of correcting biases in expendable bathythermograph (XBT) data. XBT data constitute the majority of the in situ measurements of upper-ocean heat content from 1967 to 2002, and we find that the uncertainty due to choice of XBT bias correction dominates among-method variability in OHCA curves during our 1993-2008 study period. Accounting for multiple sources of uncertainty, a composite of several OHCA curves using different XBT bias corrections still yields a statistically significant linear warming trend for 1993-2008 of 0.64 Wm [m.sup.-2] (calculated for the Earth's entire surface area), with a 90-per-cent confidence interval of 0.53-0.75W [m.sup.2]., A host of choices must be made when computing OHCA curves. These choices include how to quality-control the data, which mapping technique to use, which baseline mean climatology to use, [...]

Published
2010
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30. Ocean Temperature and Salinity Contributions to Global and Regional Sea-Level Change

Author

Church, John A., primary, Roemmich, Dean, additional, Domingues, Catia M., additional, Willis, Josh K., additional, White, Neil J., additional, Gilson, John E., additional, Stammer, Detlef, additional, Köhl, Armin, additional, Chambers, Don P., additional, Landerer, Felix W., additional, Marotzke, Jochem, additional, Gregory, Jonathan M., additional, Suzuki, Tatsuo, additional, Cazenave, Anny, additional, and Le Traon, Pierre-Yves, additional

Published
2010
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32. Bathymetry of Southeast Greenland From Oceans Melting Greenland (OMG) Data

Author

An, Lu, Rignot, Eric, Chauche, Nolwenn, Holland, David M., Holland, Denise, Jakobsson, Martin, Kane, Emily, Wood, Michael, Klaucke, Ingo, Morlighem, Mathieu, Velicogna, Isabella, Weinrebe, Wilhelm, Willis, Josh K., An, Lu, Rignot, Eric, Chauche, Nolwenn, Holland, David M., Holland, Denise, Jakobsson, Martin, Kane, Emily, Wood, Michael, Klaucke, Ingo, Morlighem, Mathieu, Velicogna, Isabella, Weinrebe, Wilhelm, and Willis, Josh K.

Abstract

Southeast Greenland has been a major participant in the ice sheet mass loss over the last several decades. Interpreting the evolution of glacier fronts requires information about their depth below sea level and ocean thermal forcing, which are incompletely known in the region. Here, we combine airborne gravity and multibeam echo sounding data from the National Aeronautics and Space Administration's Oceans Melting Greenland (OMG) mission with ocean probe and fishing boat depth data to reconstruct the bathymetry extending from the glacier margins to the edges of the continental shelf. We perform a three-dimensional inversion of the gravity data over water and merge the solution with a mass conservation reconstruction of bed topography over land. In contrast with other parts of Greenland, we find few deep troughs connecting the glaciers to the sources of warm Atlantic Water, amidst a relatively uniform, shallow (350 m) continental shelf. The deep channels include the Kangerlugssuaq, Sermilik, Gyldenlove, and Tingmiarmiut Troughs.

Published
2019
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33. Recent Cooling of the Upper Ocean

Author

Lyman, John M, Willis, Josh K, and Johnson, Gregory C

Subjects
Oceanography
Abstract

We observe a net loss of 3.2 (+/- 1.1) x 1022 J of heat from the upper ocean between 2003 and 2005. Using a broad array of in situ ocean measurements, we present annual estimates of global upper-ocean heat content anomaly from 1993 through 2005. Including the recent downturn, the average warming rate for the entire 13-year period is 0.33 +/- 0.23 W/m2 (of the Earth's total surface area). A new estimate of sampling error in the heat content record suggests that both the recent and previous global cooling events are significant and unlikely to be artifacts of inadequate ocean sampling.

Published
2006
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34. State of the climate in 2017

Author

Abernethy, R., Ackerman, Steven A., Adler, R., Albanil Encarnación, Adelina, Aldeco, Laura S., Alfaro, Eric J., Aliaga-Nestares, Vannia, Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Anderson, John, Andreassen, L. M., Argüez, Anthony, Armitage, C., Arndt, Derek S., Avalos, Grinia, Azorin-Molina, César, Báez, Julián, Bardin, M. Yu, Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behe, Carolina, Bell, Gerald D., Bellouin, Nicolas, Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blenkinsop, Stephen, Blunden, Jessica, Bolmgren, K., Bosilovich, Michael G., Boucher, Olivier, Bouchon, Marilú, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderón, Blanca, Camargo, Suzana J., Campbell, Ethan C., Campbell, Jayaka D., Cappelen, J., Carrea, Laura, Carter, Brendan R., Castro, Anabel, Chambers, Don P., Cheng, Lijing, Christiansen, Hanne H., Christy, John R., Chung, E. S., Clem, Kyle R., Coelho, Caio A.S., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Costanza, Carol, Covey, Curt, Coy, Lawrence, Cronin, T., Crouch, Jake, Cruzado, Luis, Daniel, Raychelle, Davis, Sean M., Davletshin, S. G., De Eyto, Elvira, De Jeu, Richard A.M., De La Cour, Jacqueline L., De Laat, Jos, De Gasperi, Curtis L., Degenstein, Doug, Deline, P., Demircan, Mesut, Derksen, C., Dewitte, Boris, Dhurmea, R., Di Girolamo, Larry, Diamond, Howard J., Dickerson, C., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Domingues, Ricardo, Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Eakin, C. Mark, El Kharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farmer, J., Farrell, S., Fauchald, P., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Geiger, Erick F., Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Gomez, Andrea M., Goni, Gustavo, Grooß, Jens Uwe, Gruber, Alexander, Guard, Charles P., Gugliemin, Mario, Gupta, S. K., Gutiérrez, Dimitri, Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hansen, K., Hanssen-Bauer, L., Harris, Ian, Hartfield, Gail, Heidinger, Andrew K., Heim, Richard R., Helfrich, S., Hemming, D. L., Hendricks, S., Hernández, Rafael, Hernández, Sosa Marieta, Heron, Scott F., Heuzé, C., Hidalgo, Hugo G., Ho, Shu Peng, Hobbs, William R., Horstkotte, T., Huang, Boyin, Hubert, Daan, Hueuzé, Céline, Hurst, Dale F., Ialongo, Iolanda, Ibrahim, M. M., Ijampy, J. A., Inness, Antje, Isaac, Victor, Isaksen, K., Ishii, Masayoshi, Jacobs, Stephanie J., Jeffries, Martin O., Jevrejeva, Svetlana, Jiménez, C., Jin, Xiangze, John, Viju, Johns, William E., Johnsen, Bjørn, Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Karaköylü, Erdem M., Kato, Seiji, Kazemi, A., Keller, Linda M., Kennedy, John, Kerr, Kenneth, Khan, M. S., Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. J., Klotzbach, Philip J., Knaff, John A., Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Ladd, C., Lakatos, Mónika, Lakkala, Kaisa, Lander, Mark A., Landschützer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lavado-Casimiro, Waldo, Lazzara, Matthew A., Lee, S. E., Lee, T. C., Leuliette, Eric, L'Heureux, Michelle, Li, Tim, Lieser, Jan L., Lin, I. I., Mears, Carl A., Liu, Gang, Li, Bailing, Liu, Hongxing, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., López, Luis A., Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing Jia, Luojus, K., Luthcke, S., Macias-Fauria, M., Malkova, G. V., Manney, Gloria L., Marcellin, Vernie, Marchenko, S. S., Marengo, José A., Marín, Dora, Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martin, A., Martínez, Alejandra G., Martínez-Güingla, Rodney, Martínez-Sánchez, Odalys, Marsh, Benjamin L., Lyman, John M., Massom, Robert A., May, Linda, Mayer, Michael, Mazloff, Matthew, McBride, Charlotte, McCabe, M. F., McCarthy, Mark, Meier, W., Meijers, Andrew J.S., Mekonnen, Ademe, Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Miller, Ben, Miralles, Diego G., Mitchum, Gary T., Mitro, Sukarni, Moat, Ben, Mochizuki, Y., Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Mosquera-Vásquez, Kobi, Mostafa, Awatif E., Mote, T., Mudryk, L., Mühle, Jens, Mullan, A. Brett, Müller, Rolf, Myneni, R., Nash, Eric R., Nerem, R. Steven, Newman, L., Newman, Paul A., Nielsen-Gammon, John W., Nieto, Juan José, Noetzli, Jeannette, Noll, Ben E., O'Neel, S., Osborn, Tim J., Osborne, Emily, Overland, J., Oyunjargal, Lamjav, Park, T., Pasch, Richard J., Pascual-Ramírez, Reynaldo, Pastor Saavedra, Maria Asuncion, Paterson, Andrew M., Paulik, Christoph, Pearce, Petra R., Peltier, Alexandre, Pelto, Mauri S., Peng, Liang, Perkins-Kirkpatrick, Sarah E., Perovich, Don, Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pinzon, J., Po-Chedley, S., Polashenski, C., Purkey, Sarah G., Quispe, Nelson, Rajeevan, Madhavan, Rakotoarimalala, C., Rayner, Darren, Raynolds, M. K., Reagan, James, Reid, Phillip, Reimer, Christoph, Rémy, Samuel, Revadekar, Jayashree V., Richardson, A. D., Richter-Menge, Jacqueline, Ricker, R., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Rodriguez Camino, Ernesto, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Rösner, Benjamin, Roth, Chris, Roth, David Mark, Rusak, James A., Rutishäuser, T., Sallée, Jean Bapiste, Sánchez-Lugo, Ahira, Santee, Michelle L., Sasgen, L., Sawaengphokhai, P., Sayad, T. A., Sayouri, Amal, Scambos, Ted A., Scanlon, T., Schenzinger, Verena, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schreck, Carl J., Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Silow, Eugene, Sima, Fatou, Simmons, Adrian J., Skirving, William J., Smeed, David A., Smeets, C. J.P.P., Smith, Adam, Smith, Sharon L., Soden, B., Sofieva, Viktoria, Sparks, T. H., Spence, Jacqueline M., Spillane, Sandra, Srivastava, A. K., Stackhouse, Paul W., Stammerjohn, Sharon, Stanitski, Diane M., Steinbrecht, Wolfgang, Stella, José L., Stengel, M., Stephenson, Kimberly, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Strong, Alan E., Sun-Mack, Sunny, Sutton, Adrienne J., Swart, Sebastiaan, Sweet, William, Takahashi, Kenneth S., Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thackeray, S. J., Thoman, R. L., Thompson, Philip, Thomson, L., Thorsteinsson, T., Timbal, Bertrand, Timmermans, M. L., TImofeyev, Maxim A., Tirak, Kyle V., Tobin, Skie, Togawa, H., Tømmervik, H., Tourpali, Kleareti, Trachte, Katja, Trewin, Blair C., Triñanes, Joaquin A., Trotman, Adrian R., Tschudi, M., Tucker, C. J., Tye, Mari R., Van As, D., Van De Wal, R. S.W., Van Der Ronald, J. A., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velden, Christopher S., Velicogna, I., Verburg, Piet, Vickers, H., Vincent, Lucie A., Vömel, Holger, Vose, Russell S., Wagner, Wolfgang, Walker, D. A., Walsh, J., Wang, Bin, Wang, Junhong, Wang, Lei, Wang, M., Wang, Ray, Wang, Sheng Hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Webster, M., Weller, Robert A., Westberry, Toby K., Weyhenmeyer, Gesa A., Whitewood, Robert, Widlansky, Matthew J., Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Wood, K., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yin, Xungang, Yoon, Huang, York, A., Yu, Lisan, Zambrano, Eduardo, Zhang, Huai Min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Zhu, Zhiwei, Ziel, R., Ziemke, Jerry R., Ziese, Markus G., Griffin, Jessicca, Hammer, Gregory, Love-Brotak, S. Elizabeth, Misch, Deborah J., Riddle, Deborah B., Slagle, Mary, Sprain, Mara, Veasey, Sara W., McVicar, Tim R., Sub Dynamics Meteorology, Sub Soft Condensed Matter, LS Religiewetenschap, Sub Atmospheric physics and chemistry, Zonder bezoldiging NED, LS Taalverwerving, Leerstoel Tubergen, Afd Chemical Biology and Drug Discovery, Hafd Faculteitsbureau GW, Afd Pharmacology, Dep IRAS, Marine and Atmospheric Research, and OFR - Religious Studies

Subjects
Atmospheric Science
Abstract

In 2017, the dominant greenhouse gases released into Earth's atmosphere-carbon dioxide, methane, and nitrous oxide-reached new record highs. The annual global average carbon dioxide concentration at Earth's surface for 2017 was 405.0 ± 0.1 ppm, 2.2 ppm greater than for 2016 and the highest in the modern atmospheric measurement record and in ice core records dating back as far as 800 000 years. The global growth rate of CO2 has nearly quadrupled since the early 1960s. With ENSO-neutral conditions present in the central and eastern equatorial Pacific Ocean during most of the year and weak La Niña conditions notable at the start and end, the global temperature across land and ocean surfaces ranked as the second or third highest, depending on the dataset, since records began in the mid-to-late 1800s. Notably, it was the warmest non-El Niño year in the instrumental record. Above Earth's surface, the annual lower tropospheric temperature was also either second or third highest according to all datasets analyzed. The lower stratospheric temperature was about 0.2°C higher than the record cold temperature of 2016 according to most of the in situ and satellite datasets. Several countries, including Argentina, Uruguay, Spain, and Bulgaria, reported record high annual temperatures. Mexico broke its annual record for the fourth consecutive year. On 27 January, the temperature reached 43.4°C at Puerto Madryn, Argentina-the highest temperature recorded so far south (43°S) anywhere in the world. On 28 May in Turbat, western Pakistan, the high of 53.5°C tied Pakistan's all-time highest temperature and became the world-record highest temperature for May. In the Arctic, the 2017 land surface temperature was 1.6°C above the 1981-2010 average, the second highest since the record began in 1900, behind only 2016. The five highest annual Arctic temperatures have all occurred since 2007. Exceptionally high temperatures were observed in the permafrost across the Arctic, with record values reported in much of Alaska and northwestern Canada. In August, high sea surface temperature (SST) records were broken for the Chukchi Sea, with some regions as warm as +11°C, or 3° to 4°C warmer than the longterm mean (1982-present). According to paleoclimate studies, today's abnormally warm Arctic air and SSTs have not been observed in the last 2000 years. The increasing temperatures have led to decreasing Arctic sea ice extent and thickness. On 7 March, sea ice extent at the end of the growth season saw its lowest maximum in the 37-year satellite record, covering 8% less area than the 1981-2010 average. The Arctic sea ice minimum on 13 September was the eighth lowest on record and covered 25% less area than the long-term mean. Preliminary data indicate that glaciers across the world lost mass for the 38th consecutive year on record; the declines are remarkably consistent from region to region. Cumulatively since 1980, this loss is equivalent to slicing 22 meters off the top of the average glacier. Antarctic sea ice extent remained below average for all of 2017, with record lows during the first four months. Over the continent, the austral summer seasonal melt extent and melt index were the second highest since 2005, mostly due to strong positive anomalies of air temperature over most of the West Antarctic coast. In contrast, the East Antarctic Plateau saw record low mean temperatures in March. The year was also distinguished by the second smallest Antarctic ozone hole observed since 1988. Across the global oceans, the overall long-term SST warming trend remained strong. Although SST cooled slightly from 2016 to 2017, the last three years produced the three highest annual values observed; these high anomalies have been associated with widespread coral bleaching. The most recent global coral bleaching lasted three full years, June 2014 to May 2017, and was the longest, most widespread, and almost certainly most destructive such event on record. Global integrals of 0-700-m and 0-2000-m ocean heat content reached record highs in 2017, and global mean sea level during the year became the highest annual average in the 25-year satellite altimetry record, rising to 77 mm above the 1993 average. In the tropics, 2017 saw 85 named tropical storms, slightly above the 1981-2010 average of 82. The North Atlantic basin was the only basin that featured an above-normal season, its seventh most active in the 164-year record. Three hurricanes in the basin were especially notable. Harvey produced record rainfall totals in areas of Texas and Louisiana, including a storm total of 1538.7 mm near Beaumont, Texas, which far exceeds the previous known U.S. tropical cyclone record of 1320.8 mm. Irma was the strongest tropical cyclone globally in 2017 and the strongest Atlantic hurricane outside of the Gulf of Mexico and Caribbean on record with maximum winds of 295 km h-1. Maria caused catastrophic destruction across the Caribbean Islands, including devastating wind damage and flooding across Puerto Rico. Elsewhere, the western North Pacific, South Indian, and Australian basins were all particularly quiet. Precipitation over global land areas in 2017 was clearly above the long-term average. Among noteworthy regional precipitation records in 2017, Russia reported its second wettest year on record (after 2013) and Norway experienced its sixth wettest year since records began in 1900. Across India, heavy rain and flood-related incidents during the monsoon season claimed around 800 lives. In August and September, above-normal precipitation triggered the most devastating floods in more than a decade in the Venezuelan states of Bolívar and Delta Amacuro. In Nigeria, heavy rain during August and September caused the Niger and Benue Rivers to overflow, bringing floods that displaced more than 100 000 people. Global fire activity was the lowest since at least 2003; however, high activity occurred in parts of North America, South America, and Europe, with an unusually long season in Spain and Portugal, which had their second and third driest years on record, respectively. Devastating fires impacted British Columbia, destroying 1.2 million hectares of timber, bush, and grassland, due in part to the region's driest summer on record. In the United States, an extreme western wildfire season burned over 4 million hectares; the total costs of $18 billion tripled the previous U.S. annual wildfire cost record set in 1991.

Published
2018

35. Bathymetry of Southeast Greenland From Oceans Melting Greenland (OMG) Data

Author

An, Lu, primary, Rignot, Eric, additional, Chauche, Nolwenn, additional, Holland, David M., additional, Holland, Denise, additional, Jakobsson, Martin, additional, Kane, Emily, additional, Wood, Michael, additional, Klaucke, Ingo, additional, Morlighem, Mathieu, additional, Velicogna, Isabella, additional, Weinrebe, Wilhelm, additional, and Willis, Josh K., additional

Published
2019
Full Text
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36. State of the Climate in 2017

Author

Arndt, D. S., Blunden, J., Hartfield, G., Ackerman, Steven A., Adler, Robert, Alfaro, Eric J., Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Andreassen, L. M., Argueez, Anthony, Arndt, Derek S., Azorin-molina, Cesar, Baez, Julian, Bardin, M. U., Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Bell, Gerald D., Belmont, M., Benedetti, Angela, Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Bosilovich, Michael G., Boucher, Olivier, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderon, Blanca, Camargo, Suzana J., Campbell, Jayaka D., Cappelen, J., Carrea, Laura, Carter, Brendan R., Chambers, Don P., Cheng, Ming-dean, Christiansen, Hanne H., Christy, John R., Chung, E. -s., Clem, Kyle R., Coelho, Caio A. S., Coldewey-egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Crouch, Jake, Davis, Sean M., De Eyto, Elvira, De Jeu, Richard A. M., De Laat, Jos, Degasperi, Curtis L., Degenstein, Doug, Demircan, M., Derksen, C., Di Girolamo, Larry, Diamond, Howard J., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J. H., Dutton, Geoff S., Elkharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farrell, S., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Goni, Gustavo, Grooss, J. -u., Gruber, Alexander, Guard, Charles, Gupta, S. K., Gutierrez, J. M., Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hanssen-bauer, I, Harris, Ian, Heidinger, Andrew K., Heim, Richard R., Jr., Hendricks, S., Hernandez, Marieta, Hernandez, Rafael, Hidalgo, Hugo G., Ho, Shu-peng, Hobbs, William R., Huang, Boyin, Hurst, Dale F., Ialongo, I., Ijampy, J. A., Inness, Antje, Isaksen, K., Ishii, Masayoshi, Jevrejeva, Svetlana, Jimenez, C., Jin Xiangze, John, Viju, Johns, William E., Johnsen, B., Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Kato, Seiji, Kazemi, A., Keller, Linda M., Kennedy, John, Kerr, Kenneth, Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. -j., Klotzbach, Philip J., Knaff, John A., Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Lakatos, M., Lakkala, K., Lander, Mark A., Landschuetzer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lazzara, Matthew A., Leuliette, Eric, L'Heureux, Michelle, Lieser, Jan L., Lin, I-i, Liu, Hongxing, Liu, Yinghui, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing-jia, Luojus, K., Lyman, John M., Macias-fauria, M., Malkova, G. V., Manney, G., Marchenko, S. S., Marengo, Jose A., Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martinez-gueingla, Rodney, Massom, Robert A., May, Linda, Mayer, Michael, Mazloff, Matthew, Mcbride, Charlotte, Mccabe, M. F., Mccarthy, M., Mcvicar, Tim R., Mears, Carl A., Meier, W., Mekonnen, A., Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Miralles, Diego G., Mitchum, Gary T., Mitro, Srkani, Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Mote, T., Mudryk, L., Muehle, Jens, Mullan, A. Brett, Mueller, R., Nash, Eric R., Nerem, R. Steven, Newman, Louise, Newman, Paul A., Nieto, Juan Jose, Noetzli, Jeannette, O'Neel, S., Osborn, Tim J., Overland, J., Oyunjargal, Lamjav, Park, E-hyung, Pasch, Richard J., Pascual-ramirez, Reynaldo, Paterson, Andrew M., Pearce, Petra R., Pelto, Mauri S., Perkins-kirkpatrick, Sarah E., Perovich, D., Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Rajeevan, Madhavan, Rayner, Darren, Raynolds, M. K., Reagan, James, Reid, Phillip, Reimer, Christoph, Remy, Samuel, Revadekar, Jayashree V., Richter-menge, J., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Roth, Chris, Rusak, James A., Sallee, Jean-bapiste, Sanchez-lugo, Ahira, Santee, Michelle L., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schreck, Carl J., Iii, Schuur, Ted, Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Signorini, Sergio R., Sima, Fatou, Simmons, Adrian J., Smeed, David A., Smeets, C. J. P. P., Smith, Adam, Smith, Sharon L., Soden, B., Spence, Jaqueline M., Srivastava, A. K., Stackhouse, Paul W., Jr., Stammerjohn, Sharon, Steinbrecht, Wolfgang, Stella, Jose L., Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Sun-mack, Sunny, Swart, Sebastiaan, Sweet, William, Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thoman, R. L., Thompson, L., Thompson, Philip R., Timmermans, M. -l., Tobin, Skie, Trachte, Katja, Trewin, Blair C., Trotman, Adrian R., Tschudi, M., Van As, D., Van De Wal, R. S. W., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velicogna, I., Verburg, Piet, Vincent, Lucie A., Voemel, Holger, Vose, Russell S., Wagner, Wolfgang, Walker, D. A., Walsh, J., Wang, Bin, Wang, Chunzai, Wang, Junhong, Wang, Lei, Wang, M., Wang, Sheng-hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Weller, Robert A., Weyhenmeyer, Gesa A., Whitewood, Robert, Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yin, Xungang, Yu, Lisan, Zambrano, Eduardo, Zhang, Huai-min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Ziemke, Jerry R., Abernethy, R., Albanil, Encarnacion Adelina, Aldeco, Laura S., Aliaga-nestares, Vannia, Anderson, John, Armitage, C., Avalos, Grinia, Behe, Carolina, Bellouin, Nicolas, Bernhard, G. H., Blenkinsop, Stephen, Bolmgren, K., Bouchon, Marilu, Campbell, Ethan C., Castro, Anabel, Costanza, Carol, Covey, Curt, Coy, Lawrence, Cronin, T., Cruzado, Luis, Daniel, Raychelle, Davletshin, S. G., De La Cour, Jacqueline L., Deline, P., Dewitte, Boris, Dhurmea, R., Dickerson, C., Domingues, Ricardo, Durre, Imke, Eakin, C. Mark, Farmer, J., Fauchald, P., Geiger, Erick F., Gomez, Andrea M., Gugliemin, Mario, Hansen, K., Helfrich, S., Hemming, D. L., Heron, Scott F., Heuze, C., Horstkotte, T., Hubert, Daan, Hueuze, Celine, Ibrahim, M. M., Isaac, Victor, Jacobs, Stephanie J., Jeffries, Martin O., Karakoylu, Erdem M., Khan, M. S., Ladd, C., Lavado-casimiro, Waldo, Lee, S. -e, Lee, T. C., Li, Bailing, Li, Tim, Lopez, Luis A., Luthcke, S., Marcellin, Vernie, Marin, Dora, Marsh, Benjamin L., Martin, A, Martinez, Alejandra G., Martinez-sanchez, Odalys, Meijers, Andrew J. S., Miller, Ben, Moat, Ben, Mochizuki, Y., Mosquera-vasquez, Kobi, Mostafa, Awatif E., Nielsen-gammon, John W., Noll, Ben E., Osborne, Emily, Pastor, Saavedra Maria Asuncion, Paulik, Christoph, Peltier, Alexandre, Pinzon, J., Po-chedley, S., Polashenski, C., Purkey, Sarah G., Quispe, Nelson, Rakotoarimalala, C., Richardson, A. D., Ricker, R, Rodriguez, Camino Ernesto, Rosner, Benjamin, Roth, David Mark, Rutishauser, T., Sasgen, L., Sayad, T. A., Scanlon, T., Schenzinger, Verena, Silow, Eugene, Skirving, William J., Sofieva, Viktoria, Sparks, T. H., Spillane, Sandra, Stanitski, Diane M., Stengel, M., Stephenson, Kimberly, Strong, Alan E., Sutton, Adrienne J., Takahashi, Kenneth S., Thackeray, S. J., Thomson, Lthorsteinsson T., Timbal, Bertrand, Timofeyev, Maxim A., Tirak, Kyle, V, Togawa, H., Tommervik, H., Tourpali, Kleareti, Trinanes, Joaquin A., Tucker, C. J., Tye, Mari R., Van Der A, Ronald J., Velden, Christopher S., Vickers, H., Webster, M., Westberry, Toby K., Widlansky, Matthew J., Wood, K., Yoon, Huang, York, A., Zhu, Zhiwei, Ziel, R., Ziese, Markus G., Arndt, D. S., Blunden, J., Hartfield, G., Ackerman, Steven A., Adler, Robert, Alfaro, Eric J., Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Andreassen, L. M., Argueez, Anthony, Arndt, Derek S., Azorin-molina, Cesar, Baez, Julian, Bardin, M. U., Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Bell, Gerald D., Belmont, M., Benedetti, Angela, Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Bosilovich, Michael G., Boucher, Olivier, Box, J. 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J., Tye, Mari R., Van Der A, Ronald J., Velden, Christopher S., Vickers, H., Webster, M., Westberry, Toby K., Widlansky, Matthew J., Wood, K., Yoon, Huang, York, A., Zhu, Zhiwei, Ziel, R., and Ziese, Markus G.

Abstract

In 2017, the dominant greenhouse gases released into Earth’s atmosphere—carbon dioxide, methane, and nitrous oxide— reached new record highs. The annual global average carbon dioxide concentration at Earth’s surface for 2017 was 405.0 ± 0.1 ppm, 2.2 ppm greater than for 2016 and the highest in the modern atmospheric measurement record and in ice core records dating back as far as 800 000 years. The global growth rate of CO2 has nearly quadrupled since the early 1960s. With ENSO-neutral conditions present in the central and eastern equatorial Pacific Ocean during most of the year and weak La Niña conditions notable at the start and end, the global temperature across land and ocean surfaces ranked as the second or third highest, depending on the dataset, since records began in the mid-to-late 1800s. Notably, it was the warmest non-El Niño year in the instrumental record. Above Earth’s surface, the annual lower tropospheric temperature was also either second or third highest according to all datasets analyzed. The lower stratospheric temperature was about 0.2°C higher than the record cold temperature of 2016 according to most of the in situ and satellite datasets. Several countries, including Argentina, Uruguay, Spain, and Bulgaria, reported record high annual temperatures. Mexico broke its annual record for the fourth consecutive year. On 27 January, the temperature reached 43.4°C at Puerto Madryn, Argentina—the highest temperature recorded so far south (43°S) anywhere in the world. On 28 May in Turbat, western Pakistan, the high of 53.5°C tied Pakistan’s all-time highest temperature and became the world-record highest temperature for May. In the Arctic, the 2017 land surface temperature was 1.6°C above the 1981–2010 average, the second highest since the record began in 1900, behind only 2016. The five highest annual Arctic temperatures have all occurred since 2007. Exceptionally high temperatures were observed in the permafrost across the Arctic, with record values r

Published
2018
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37. State of the climate in 2017

Author

Sub Dynamics Meteorology, Sub Soft Condensed Matter, LS Religiewetenschap, Sub Atmospheric physics and chemistry, Zonder bezoldiging NED, LS Taalverwerving, Leerstoel Tubergen, Afd Chemical Biology and Drug Discovery, Hafd Faculteitsbureau GW, Afd Pharmacology, Dep IRAS, Marine and Atmospheric Research, OFR - Religious Studies, Abernethy, R., Ackerman, Steven A., Adler, R., Albanil Encarnación, Adelina, Aldeco, Laura S., Alfaro, Eric J., Aliaga-Nestares, Vannia, Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Anderson, John, Andreassen, L. M., Argüez, Anthony, Armitage, C., Arndt, Derek S., Avalos, Grinia, Azorin-Molina, César, Báez, Julián, Bardin, M. Yu, Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behe, Carolina, Bell, Gerald D., Bellouin, Nicolas, Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blenkinsop, Stephen, Blunden, Jessica, Bolmgren, K., Bosilovich, Michael G., Boucher, Olivier, Bouchon, Marilú, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderón, Blanca, Camargo, Suzana J., Campbell, Ethan C., Campbell, Jayaka D., Cappelen, J., Carrea, Laura, Carter, Brendan R., Castro, Anabel, Chambers, Don P., Cheng, Lijing, Christiansen, Hanne H., Christy, John R., Chung, E. S., Clem, Kyle R., Coelho, Caio A.S., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Costanza, Carol, Covey, Curt, Coy, Lawrence, Cronin, T., Crouch, Jake, Cruzado, Luis, Daniel, Raychelle, Davis, Sean M., Davletshin, S. G., De Eyto, Elvira, De Jeu, Richard A.M., De La Cour, Jacqueline L., De Laat, Jos, De Gasperi, Curtis L., Degenstein, Doug, Deline, P., Demircan, Mesut, Derksen, C., Dewitte, Boris, Dhurmea, R., Di Girolamo, Larry, Diamond, Howard J., Dickerson, C., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Domingues, Ricardo, Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Eakin, C. Mark, El Kharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farmer, J., Farrell, S., Fauchald, P., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Geiger, Erick F., Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Gomez, Andrea M., Goni, Gustavo, Grooß, Jens Uwe, Gruber, Alexander, Guard, Charles P., Gugliemin, Mario, Gupta, S. K., Gutiérrez, Dimitri, Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hansen, K., Hanssen-Bauer, L., Harris, Ian, Hartfield, Gail, Heidinger, Andrew K., Heim, Richard R., Helfrich, S., Hemming, D. L., Hendricks, S., Hernández, Rafael, Hernández, Sosa Marieta, Heron, Scott F., Heuzé, C., Hidalgo, Hugo G., Ho, Shu Peng, Hobbs, William R., Horstkotte, T., Huang, Boyin, Hubert, Daan, Hueuzé, Céline, Hurst, Dale F., Ialongo, Iolanda, Ibrahim, M. M., Ijampy, J. A., Inness, Antje, Isaac, Victor, Isaksen, K., Ishii, Masayoshi, Jacobs, Stephanie J., Jeffries, Martin O., Jevrejeva, Svetlana, Jiménez, C., Jin, Xiangze, John, Viju, Johns, William E., Johnsen, Bjørn, Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Karaköylü, Erdem M., Kato, Seiji, Kazemi, A., Keller, Linda M., Kennedy, John, Kerr, Kenneth, Khan, M. S., Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. J., Klotzbach, Philip J., Knaff, John A., Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Ladd, C., Lakatos, Mónika, Lakkala, Kaisa, Lander, Mark A., Landschützer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lavado-Casimiro, Waldo, Lazzara, Matthew A., Lee, S. E., Lee, T. C., Leuliette, Eric, L'Heureux, Michelle, Li, Tim, Lieser, Jan L., Lin, I. 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Elizabeth, Misch, Deborah J., Riddle, Deborah B., Slagle, Mary, Sprain, Mara, Veasey, Sara W., McVicar, Tim R., Sub Dynamics Meteorology, Sub Soft Condensed Matter, LS Religiewetenschap, Sub Atmospheric physics and chemistry, Zonder bezoldiging NED, LS Taalverwerving, Leerstoel Tubergen, Afd Chemical Biology and Drug Discovery, Hafd Faculteitsbureau GW, Afd Pharmacology, Dep IRAS, Marine and Atmospheric Research, OFR - Religious Studies, Abernethy, R., Ackerman, Steven A., Adler, R., Albanil Encarnación, Adelina, Aldeco, Laura S., Alfaro, Eric J., Aliaga-Nestares, Vannia, Allan, Richard P., Allan, Rob, Alves, Lincoln M., Amador, Jorge A., Anderson, John, Andreassen, L. M., Argüez, Anthony, Armitage, C., Arndt, Derek S., Avalos, Grinia, Azorin-Molina, César, Báez, Julián, Bardin, M. Yu, Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behe, Carolina, Bell, Gerald D., Bellouin, Nicolas, Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bhatt, U. S., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blenkinsop, Stephen, Blunden, Jessica, Bolmgren, K., Bosilovich, Michael G., Boucher, Olivier, Bouchon, Marilú, Box, J. E., Boyer, Tim, Braathen, Geir O., Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderón, Blanca, Camargo, Suzana J., Campbell, Ethan C., Campbell, Jayaka D., Cappelen, J., Carrea, Laura, Carter, Brendan R., Castro, Anabel, Chambers, Don P., Cheng, Lijing, Christiansen, Hanne H., Christy, John R., Chung, E. S., Clem, Kyle R., Coelho, Caio A.S., Coldewey-Egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Costanza, Carol, Covey, Curt, Coy, Lawrence, Cronin, T., Crouch, Jake, Cruzado, Luis, Daniel, Raychelle, Davis, Sean M., Davletshin, S. G., De Eyto, Elvira, De Jeu, Richard A.M., De La Cour, Jacqueline L., De Laat, Jos, De Gasperi, Curtis L., Degenstein, Doug, Deline, P., Demircan, Mesut, Derksen, C., Dewitte, Boris, Dhurmea, R., Di Girolamo, Larry, Diamond, Howard J., Dickerson, C., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Domingues, Ricardo, Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J.H., Durre, Imke, Dutton, Geoff S., Eakin, C. Mark, El Kharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Famiglietti, James S., Farmer, J., Farrell, S., Fauchald, P., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Geiger, Erick F., Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Gomez, Andrea M., Goni, Gustavo, Grooß, Jens Uwe, Gruber, Alexander, Guard, Charles P., Gugliemin, Mario, Gupta, S. K., Gutiérrez, Dimitri, Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hansen, K., Hanssen-Bauer, L., Harris, Ian, Hartfield, Gail, Heidinger, Andrew K., Heim, Richard R., Helfrich, S., Hemming, D. L., Hendricks, S., Hernández, Rafael, Hernández, Sosa Marieta, Heron, Scott F., Heuzé, C., Hidalgo, Hugo G., Ho, Shu Peng, Hobbs, William R., Horstkotte, T., Huang, Boyin, Hubert, Daan, Hueuzé, Céline, Hurst, Dale F., Ialongo, Iolanda, Ibrahim, M. M., Ijampy, J. A., Inness, Antje, Isaac, Victor, Isaksen, K., Ishii, Masayoshi, Jacobs, Stephanie J., Jeffries, Martin O., Jevrejeva, Svetlana, Jiménez, C., Jin, Xiangze, John, Viju, Johns, William E., Johnsen, Bjørn, Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Karaköylü, Erdem M., Kato, Seiji, Kazemi, A., Keller, Linda M., Kennedy, John, Kerr, Kenneth, Khan, M. S., Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. J., Klotzbach, Philip J., Knaff, John A., Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Ladd, C., Lakatos, Mónika, Lakkala, Kaisa, Lander, Mark A., Landschützer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lavado-Casimiro, Waldo, Lazzara, Matthew A., Lee, S. E., Lee, T. C., Leuliette, Eric, L'Heureux, Michelle, Li, Tim, Lieser, Jan L., Lin, I. I., Mears, Carl A., Liu, Gang, Li, Bailing, Liu, Hongxing, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., López, Luis A., Lorrey, Andrew M., Loyola, Diego, Lumpkin, Rick, Luo, Jing Jia, Luojus, K., Luthcke, S., Macias-Fauria, M., Malkova, G. V., Manney, Gloria L., Marcellin, Vernie, Marchenko, S. S., Marengo, José A., Marín, Dora, Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martin, A., Martínez, Alejandra G., Martínez-Güingla, Rodney, Martínez-Sánchez, Odalys, Marsh, Benjamin L., Lyman, John M., Massom, Robert A., May, Linda, Mayer, Michael, Mazloff, Matthew, McBride, Charlotte, McCabe, M. F., McCarthy, Mark, Meier, W., Meijers, Andrew J.S., Mekonnen, Ademe, Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Miller, Ben, Miralles, Diego G., Mitchum, Gary T., Mitro, Sukarni, Moat, Ben, Mochizuki, Y., Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Mosquera-Vásquez, Kobi, Mostafa, Awatif E., Mote, T., Mudryk, L., Mühle, Jens, Mullan, A. Brett, Müller, Rolf, Myneni, R., Nash, Eric R., Nerem, R. Steven, Newman, L., Newman, Paul A., Nielsen-Gammon, John W., Nieto, Juan José, Noetzli, Jeannette, Noll, Ben E., O'Neel, S., Osborn, Tim J., Osborne, Emily, Overland, J., Oyunjargal, Lamjav, Park, T., Pasch, Richard J., Pascual-Ramírez, Reynaldo, Pastor Saavedra, Maria Asuncion, Paterson, Andrew M., Paulik, Christoph, Pearce, Petra R., Peltier, Alexandre, Pelto, Mauri S., Peng, Liang, Perkins-Kirkpatrick, Sarah E., Perovich, Don, Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pinzon, J., Po-Chedley, S., Polashenski, C., Purkey, Sarah G., Quispe, Nelson, Rajeevan, Madhavan, Rakotoarimalala, C., Rayner, Darren, Raynolds, M. K., Reagan, James, Reid, Phillip, Reimer, Christoph, Rémy, Samuel, Revadekar, Jayashree V., Richardson, A. D., Richter-Menge, Jacqueline, Ricker, R., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Rodriguez Camino, Ernesto, Romanovsky, Vladimir E., Ronchail, Josyane, Rosenlof, Karen H., Rösner, Benjamin, Roth, Chris, Roth, David Mark, Rusak, James A., Rutishäuser, T., Sallée, Jean Bapiste, Sánchez-Lugo, Ahira, Santee, Michelle L., Sasgen, L., Sawaengphokhai, P., Sayad, T. A., Sayouri, Amal, Scambos, Ted A., Scanlon, T., Schenzinger, Verena, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schreck, Carl J., Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Silow, Eugene, Sima, Fatou, Simmons, Adrian J., Skirving, William J., Smeed, David A., Smeets, C. J.P.P., Smith, Adam, Smith, Sharon L., Soden, B., Sofieva, Viktoria, Sparks, T. H., Spence, Jacqueline M., Spillane, Sandra, Srivastava, A. K., Stackhouse, Paul W., Stammerjohn, Sharon, Stanitski, Diane M., Steinbrecht, Wolfgang, Stella, José L., Stengel, M., Stephenson, Kimberly, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Strong, Alan E., Sun-Mack, Sunny, Sutton, Adrienne J., Swart, Sebastiaan, Sweet, William, Takahashi, Kenneth S., Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thackeray, S. J., Thoman, R. L., Thompson, Philip, Thomson, L., Thorsteinsson, T., Timbal, Bertrand, Timmermans, M. L., TImofeyev, Maxim A., Tirak, Kyle V., Tobin, Skie, Togawa, H., Tømmervik, H., Tourpali, Kleareti, Trachte, Katja, Trewin, Blair C., Triñanes, Joaquin A., Trotman, Adrian R., Tschudi, M., Tucker, C. J., Tye, Mari R., Van As, D., Van De Wal, R. S.W., Van Der Ronald, J. A., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velden, Christopher S., Velicogna, I., Verburg, Piet, Vickers, H., Vincent, Lucie A., Vömel, Holger, Vose, Russell S., Wagner, Wolfgang, Walker, D. A., Walsh, J., Wang, Bin, Wang, Junhong, Wang, Lei, Wang, M., Wang, Ray, Wang, Sheng Hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Webster, M., Weller, Robert A., Westberry, Toby K., Weyhenmeyer, Gesa A., Whitewood, Robert, Widlansky, Matthew J., Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Wood, K., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yin, Xungang, Yoon, Huang, York, A., Yu, Lisan, Zambrano, Eduardo, Zhang, Huai Min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Zhu, Zhiwei, Ziel, R., Ziemke, Jerry R., Ziese, Markus G., Griffin, Jessicca, Hammer, Gregory, Love-Brotak, S. Elizabeth, Misch, Deborah J., Riddle, Deborah B., Slagle, Mary, Sprain, Mara, Veasey, Sara W., and McVicar, Tim R.

Published
2018

39. State of the Climate in 2016

Author

Arndt, D. S., Blunden, J., Dunn, R. J. H., Aaron-morrison, Arlene P., Abdallah, A., Ackerman, Steven A., Adler, Robert, Alfaro, Eric J., Allan, Richard P., Allan, Rob, Alvarez, Luis A., Alves, Lincoln M., Amador, Jorge A., Andreassen, L. M., Arce, Dayana, Argueez, Anthony, Arndt, Derek S., Arzhanova, N. M., Augustine, John, Awatif, E. M., Azorin-molina, Cesar, Baez, Julian, Bardin, M. U., Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behrenfeld, Michael J., Bell, Gerald D., Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bettolli, Maria L., Bhatt, U. S., Bidegain, Mario, Biskaborn, B., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blunden, Jessica, Bosilovich, Michael G., Boucher, Olivier, Boudet, Dagne, Box, J. E., Boyer, Tim, Braathen, Geir O., Brimelow, Julian, Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderon, Blanca, Camargo, Suzana J., Campbell, Jayaka D., Cappelen, J., Caroff, P., Carrea, Laura, Carter, Brendan R., Chambers, Don P., Chandler, Elise, Cheng, Ming-dean, Christiansen, Hanne H., Christy, John R., Chung, Daniel, Chung, E. -s., Clem, Kyle R., Coelho, Caio A. S., Coldewey-egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Cross, J. N., Crouch, Jake, Cutie, Virgen, Davis, Sean M., De Eyto, Elvira, De Jeu, Richard A. M., De Laat, Jos, Degasperi, Curtis L., Degenstein, Doug, Demircan, M., Derksen, C., Di Girolamo, Larry, Diamond, Howard J., Dindyal, S., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J. H., Duran-quesada, Ana M., Dutton, Geoff S., Elkharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Etienne-leblanc, Sheryl, Famiglietti, James S., Farrell, S., Fateh, S., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flannigan, Mike, Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Fonseca, C., Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Goni, Gustavo, Gonzalez, Idelmis T., Goto, A., Greenhough, Marianna D., Grooss, J. -u., Gruber, Alexander, Guard, Charles, Gupta, S. K., Gutierrez, J. M., Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hanssen-bauer, I, Hare, Jon, Harris, Ian, Heidinger, Andrew K., Heim, Richard R., Jr., Hendricks, S., Hernandez, Marieta, Hernandez, Rafael, Hidalgo, Hugo G., Ho, Shu-peng, Hobbs, William R., Huang, Boyin, Huelsing, Hannah K., Hurst, Dale F., Ialongo, I., Ijampy, J. A., Inness, Antje, Isaksen, K., Ishii, Masayoshi, Jevrejeva, Svetlana, Jimenez, C., Jin Xiangze, John, Viju, Johns, William E., Johnsen, B., Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Kass, David, Kato, Seiji, Kazemi, A., Kelem, G., Keller, Linda M., Kelly, B. P., Kendon, Mike, Kennedy, John, Kerr, Kenneth, Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. -j., Kimberlain, Todd B., Klotzbach, Philip J., Knaff, John A., Kochtubajda, Bob, Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Lakatos, M., Lakkala, K., Lanckmann, J. -p., Lander, Mark A., Landschuetzer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lantz, Kathleen, Lazzara, Matthew A., Leuliette, Eric, Lewis, Stephen R., L'Heureux, Michelle, Lieser, Jan L., Lin, I-i, Liu, Hongxing, Liu, Yinghui, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., Loranty, M., Lorrey, Andrew M., Loyola, Diego, Lu, Mong-ming, Lumpkin, Rick, Luo, Jing-jia, Luojus, K., Lyman, John M., Macara, Gregor, Macdonald, Alison M., Macias-fauria, M., Malkova, G. V., Manney, G., Marchenko, S. S., Marengo, Jose A., Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martinez-gueingla, Rodney, Massom, Robert A., Mathis, Jeremy T., May, Linda, Mayer, Michael, Mazloff, Matthew, Mcbride, Charlotte, Mccabe, M. F., Mccarthy, Gerard, Mccarthy, M., Mcdonagh, Elaine L., Mcgree, Simon, Mcvicar, Tim R., Mears, Carl A., Meier, W., Mekonnen, A., Menezes, V. V., Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Minnis, Patrick, Miralles, Diego G., Mistelbauer, T., Mitchum, Gary T., Mitro, Srkani, Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Morrow, Blair, Mote, T., Mudryk, L., Muehle, Jens, Mullan, A. Brett, Mueller, R., Nash, Eric R., Nerem, R. Steven, Newman, Louise, Newman, Paul A., Nieto, Juan Jose, Noetzli, Jeannette, O'Neel, S., Osborn, Tim J., Overland, J., Oyunjargal, Lamjav, Parinussa, Robert M., Park, E-hyung, Pasch, Richard J., Pascual-ramirez, Reynaldo, Paterson, Andrew M., Pearce, Petra R., Pellichero, Violaine, Pelto, Mauri S., Peng, Liang, Perkins-kirkpatrick, Sarah E., Perovich, D., Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pitts, Michael C., Pons, M. R., Porter, Avalon O., Quintana, Juan, Rahimzadeh, Fatemeh, Rajeevan, Madhavan, Rayner, Darren, Raynolds, M. K., Razuvaev, Vyacheslav N., Read, Peter, Reagan, James, Reid, Phillip, Reimer, Christoph, Remy, Samuel, Renwick, James A., Revadekar, Jayashree V., Richter-menge, J., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Rollenbeck, Ruetger, Romanovsky, Vladimir E., Ronchail, Josyane, Roquet, F., Rosenlof, Karen H., Roth, Chris, Rusak, James A., Sallee, Jean-bapiste, Sanchez-lugo, Ahira, Santee, Michelle L., Sarmiento, Jorge L., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Schemm, Jae, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schoeneich, P., Schreck, Carl J., Iii, Schuur, Ted, Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Signorini, Sergio R., Silov, Eugene, Sima, Fatou, Simmons, Adrian J., Smeed, David A., Smeets, C. J. P. P., Smith, Adam, Smith, Sharon L., Soden, B., Spence, Jaqueline M., Srivastava, A. K., Stackhouse, Paul W., Jr., Stammerjohn, Sharon, Steinbrecht, Wolfgang, Stella, Jose L., Stennett-brown, Roxann, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Sun-mack, Sunny, Swart, Sebastiaan, Sweet, William, Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thoman, R. L., Thompson, L., Thompson, Philip R., Timmermans, M. -l., Timofeev, Maxim A., Tirnanes, Joaquin A., Tobin, Skie, Trachte, Katja, Trewin, Blair C., Trotman, Adrian R., Tschudi, M., Tweedy, Olga, Van As, D., Van De Wal, R. S. W., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velicogna, I., Verburg, Piet, Vieira, G., Vincent, Lucie A., Voemel, Holger, Vose, Russell S., Wagner, Wolfgang, Wahlin, Anna, Walker, D. A., Walsh, J., Wang, Bin, Wang, Chunzai, Wang, Junhong, Wang, Lei, Wang, M., Wang, Sheng-hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Weller, Robert A., Weyhenmeyer, Gesa A., Whitewood, Robert, Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willie, Shem, Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yim, So-young, Yin, Xungang, Yu, Lisan, Zambrano, Eduardo, Zhang, Huai-min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Ziemke, Jerry R., Zilberman, Nathalie, Arndt, D. S., Blunden, J., Dunn, R. J. H., Aaron-morrison, Arlene P., Abdallah, A., Ackerman, Steven A., Adler, Robert, Alfaro, Eric J., Allan, Richard P., Allan, Rob, Alvarez, Luis A., Alves, Lincoln M., Amador, Jorge A., Andreassen, L. M., Arce, Dayana, Argueez, Anthony, Arndt, Derek S., Arzhanova, N. M., Augustine, John, Awatif, E. M., Azorin-molina, Cesar, Baez, Julian, Bardin, M. U., Barichivich, Jonathan, Baringer, Molly O., Barreira, Sandra, Baxter, Stephen, Beck, H. E., Becker, Andreas, Bedka, Kristopher M., Behrenfeld, Michael J., Bell, Gerald D., Belmont, M., Benedetti, Angela, Bernhard, G. H., Berrisford, Paul, Berry, David I., Bettolli, Maria L., Bhatt, U. S., Bidegain, Mario, Biskaborn, B., Bissolli, Peter, Bjerke, J., Blake, Eric S., Blunden, Jessica, Bosilovich, Michael G., Boucher, Olivier, Boudet, Dagne, Box, J. E., Boyer, Tim, Braathen, Geir O., Brimelow, Julian, Bromwich, David H., Brown, R., Buehler, S., Bulygina, Olga N., Burgess, D., Calderon, Blanca, Camargo, Suzana J., Campbell, Jayaka D., Cappelen, J., Caroff, P., Carrea, Laura, Carter, Brendan R., Chambers, Don P., Chandler, Elise, Cheng, Ming-dean, Christiansen, Hanne H., Christy, John R., Chung, Daniel, Chung, E. -s., Clem, Kyle R., Coelho, Caio A. S., Coldewey-egbers, Melanie, Colwell, Steve, Cooper, Owen R., Copland, L., Cross, J. N., Crouch, Jake, Cutie, Virgen, Davis, Sean M., De Eyto, Elvira, De Jeu, Richard A. M., De Laat, Jos, Degasperi, Curtis L., Degenstein, Doug, Demircan, M., Derksen, C., Di Girolamo, Larry, Diamond, Howard J., Dindyal, S., Dlugokencky, Ed J., Dohan, Kathleen, Dokulil, Martin T., Dolman, A. Johannes, Domingues, Catia M., Donat, Markus G., Dong, Shenfu, Dorigo, Wouter A., Drozdov, D. S., Dunn, Robert J. H., Duran-quesada, Ana M., Dutton, Geoff S., Elkharrim, M., Elkins, James W., Epstein, H. E., Espinoza, Jhan C., Etienne-leblanc, Sheryl, Famiglietti, James S., Farrell, S., Fateh, S., Fausto, R. S., Feely, Richard A., Feng, Z., Fenimore, Chris, Fettweis, X., Fioletov, Vitali E., Flannigan, Mike, Flemming, Johannes, Fogt, Ryan L., Folland, Chris, Fonseca, C., Forbes, B. C., Foster, Michael J., Francis, S. D., Franz, Bryan A., Frey, Richard A., Frith, Stacey M., Froidevaux, Lucien, Ganter, Catherine, Gerland, S., Gilson, John, Gobron, Nadine, Goldenberg, Stanley B., Goni, Gustavo, Gonzalez, Idelmis T., Goto, A., Greenhough, Marianna D., Grooss, J. -u., Gruber, Alexander, Guard, Charles, Gupta, S. K., Gutierrez, J. M., Haas, C., Hagos, S., Hahn, Sebastian, Haimberger, Leo, Hall, Brad D., Halpert, Michael S., Hamlington, Benjamin D., Hanna, E., Hanssen-bauer, I, Hare, Jon, Harris, Ian, Heidinger, Andrew K., Heim, Richard R., Jr., Hendricks, S., Hernandez, Marieta, Hernandez, Rafael, Hidalgo, Hugo G., Ho, Shu-peng, Hobbs, William R., Huang, Boyin, Huelsing, Hannah K., Hurst, Dale F., Ialongo, I., Ijampy, J. A., Inness, Antje, Isaksen, K., Ishii, Masayoshi, Jevrejeva, Svetlana, Jimenez, C., Jin Xiangze, John, Viju, Johns, William E., Johnsen, B., Johnson, Bryan, Johnson, Gregory C., Johnson, Kenneth S., Jones, Philip D., Jumaux, Guillaume, Kabidi, Khadija, Kaiser, J. W., Kass, David, Kato, Seiji, Kazemi, A., Kelem, G., Keller, Linda M., Kelly, B. P., Kendon, Mike, Kennedy, John, Kerr, Kenneth, Kholodov, A. L., Khoshkam, Mahbobeh, Killick, Rachel, Kim, Hyungjun, Kim, S. -j., Kimberlain, Todd B., Klotzbach, Philip J., Knaff, John A., Kochtubajda, Bob, Kohler, J., Korhonen, Johanna, Korshunova, Natalia N., Kramarova, Natalya, Kratz, D. P., Kruger, Andries, Kruk, Michael C., Krumpen, T., Lakatos, M., Lakkala, K., Lanckmann, J. -p., Lander, Mark A., Landschuetzer, Peter, Landsea, Chris W., Lankhorst, Matthias, Lantz, Kathleen, Lazzara, Matthew A., Leuliette, Eric, Lewis, Stephen R., L'Heureux, Michelle, Lieser, Jan L., Lin, I-i, Liu, Hongxing, Liu, Yinghui, Locarnini, Ricardo, Loeb, Norman G., Long, Craig S., Loranty, M., Lorrey, Andrew M., Loyola, Diego, Lu, Mong-ming, Lumpkin, Rick, Luo, Jing-jia, Luojus, K., Lyman, John M., Macara, Gregor, Macdonald, Alison M., Macias-fauria, M., Malkova, G. V., Manney, G., Marchenko, S. S., Marengo, Jose A., Marra, John J., Marszelewski, Wlodzimierz, Martens, B., Martinez-gueingla, Rodney, Massom, Robert A., Mathis, Jeremy T., May, Linda, Mayer, Michael, Mazloff, Matthew, Mcbride, Charlotte, Mccabe, M. F., Mccarthy, Gerard, Mccarthy, M., Mcdonagh, Elaine L., Mcgree, Simon, Mcvicar, Tim R., Mears, Carl A., Meier, W., Mekonnen, A., Menezes, V. V., Mengistu Tsidu, G., Menzel, W. Paul, Merchant, Christopher J., Meredith, Michael P., Merrifield, Mark A., Minnis, Patrick, Miralles, Diego G., Mistelbauer, T., Mitchum, Gary T., Mitro, Srkani, Monselesan, Didier, Montzka, Stephen A., Mora, Natalie, Morice, Colin, Morrow, Blair, Mote, T., Mudryk, L., Muehle, Jens, Mullan, A. Brett, Mueller, R., Nash, Eric R., Nerem, R. Steven, Newman, Louise, Newman, Paul A., Nieto, Juan Jose, Noetzli, Jeannette, O'Neel, S., Osborn, Tim J., Overland, J., Oyunjargal, Lamjav, Parinussa, Robert M., Park, E-hyung, Pasch, Richard J., Pascual-ramirez, Reynaldo, Paterson, Andrew M., Pearce, Petra R., Pellichero, Violaine, Pelto, Mauri S., Peng, Liang, Perkins-kirkpatrick, Sarah E., Perovich, D., Petropavlovskikh, Irina, Pezza, Alexandre B., Phillips, C., Phillips, David, Phoenix, G., Pinty, Bernard, Pitts, Michael C., Pons, M. R., Porter, Avalon O., Quintana, Juan, Rahimzadeh, Fatemeh, Rajeevan, Madhavan, Rayner, Darren, Raynolds, M. K., Razuvaev, Vyacheslav N., Read, Peter, Reagan, James, Reid, Phillip, Reimer, Christoph, Remy, Samuel, Renwick, James A., Revadekar, Jayashree V., Richter-menge, J., Rimmer, Alon, Robinson, David A., Rodell, Matthew, Rollenbeck, Ruetger, Romanovsky, Vladimir E., Ronchail, Josyane, Roquet, F., Rosenlof, Karen H., Roth, Chris, Rusak, James A., Sallee, Jean-bapiste, Sanchez-lugo, Ahira, Santee, Michelle L., Sarmiento, Jorge L., Sawaengphokhai, P., Sayouri, Amal, Scambos, Ted A., Schemm, Jae, Schladow, S. Geoffrey, Schmid, Claudia, Schmid, Martin, Schoeneich, P., Schreck, Carl J., Iii, Schuur, Ted, Selkirk, H. B., Send, Uwe, Sensoy, Serhat, Sharp, M., Shi, Lei, Shiklomanov, Nikolai I., Shimaraeva, Svetlana V., Siegel, David A., Signorini, Sergio R., Silov, Eugene, Sima, Fatou, Simmons, Adrian J., Smeed, David A., Smeets, C. J. P. P., Smith, Adam, Smith, Sharon L., Soden, B., Spence, Jaqueline M., Srivastava, A. K., Stackhouse, Paul W., Jr., Stammerjohn, Sharon, Steinbrecht, Wolfgang, Stella, Jose L., Stennett-brown, Roxann, Stephenson, Tannecia S., Strahan, Susan, Streletskiy, Dimitri A., Sun-mack, Sunny, Swart, Sebastiaan, Sweet, William, Tamar, Gerard, Taylor, Michael A., Tedesco, M., Thoman, R. L., Thompson, L., Thompson, Philip R., Timmermans, M. -l., Timofeev, Maxim A., Tirnanes, Joaquin A., Tobin, Skie, Trachte, Katja, Trewin, Blair C., Trotman, Adrian R., Tschudi, M., Tweedy, Olga, Van As, D., Van De Wal, R. S. W., Van Der Schalie, Robin, Van Der Schrier, Gerard, Van Der Werf, Guido R., Van Meerbeeck, Cedric J., Velicogna, I., Verburg, Piet, Vieira, G., Vincent, Lucie A., Voemel, Holger, Vose, Russell S., Wagner, Wolfgang, Wahlin, Anna, Walker, D. A., Walsh, J., Wang, Bin, Wang, Chunzai, Wang, Junhong, Wang, Lei, Wang, M., Wang, Sheng-hung, Wanninkhof, Rik, Watanabe, Shohei, Weber, Mark, Weller, Robert A., Weyhenmeyer, Gesa A., Whitewood, Robert, Wiese, David N., Wijffels, Susan E., Wilber, Anne C., Wild, Jeanette D., Willett, Kate M., Willie, Shem, Willis, Josh K., Wolken, G., Wong, Takmeng, Wood, E. F., Woolway, R. Iestyn, Wouters, B., Xue, Yan, Yim, So-young, Yin, Xungang, Yu, Lisan, Zambrano, Eduardo, Zhang, Huai-min, Zhang, Peiqun, Zhao, Guanguo, Zhao, Lin, Ziemke, Jerry R., and Zilberman, Nathalie

Abstract

In 2016, the dominant greenhouse gases released into Earth's atmosphere-carbon dioxide, methane, and nitrous oxide-continued to increase and reach new record highs. The 3.5 +/- 0.1 ppm rise in global annual mean carbon dioxide from 2015 to 2016 was the largest annual increase observed in the 58-year measurement record. The annual global average carbon dioxide concentration at Earth's surface surpassed 400 ppm (402.9 +/- 0.1 ppm) for the first time in the modern atmospheric measurement record and in ice core records dating back as far as 800000 years. One of the strongest El Nino events since at least 1950 dissipated in spring, and a weak La Nina evolved later in the year. Owing at least in part to the combination of El Nino conditions early in the year and a long-term upward trend, Earth's surface observed record warmth for a third consecutive year, albeit by a much slimmer margin than by which that record was set in 2015. Above Earth's surface, the annual lower troposphere temperature was record high according to all datasets analyzed, while the lower stratospheric temperature was record low according to most of the in situ and satellite datasets. Several countries, including Mexico and India, reported record high annual temperatures while many others observed near-record highs. A week-long heat wave at the end of April over the northern and eastern Indian peninsula, with temperatures surpassing 44 degrees C, contributed to a water crisis for 330 million people and to 300 fatalities. In the Arctic the 2016 land surface temperature was 2.0 degrees C above the 1981-2010 average, breaking the previous record of 2007, 2011, and 2015 by 0.8 degrees C, representing a 3.5 degrees C increase since the record began in 1900. The increasing temperatures have led to decreasing Arctic sea ice extent and thickness. On 24 March, the sea ice extent at the end of the growth season saw its lowest maximum in the 37-year satellite record, tying with 2015 at 7.2% below the 1981-2010 av

Published
2017
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40. Correction to' Recent cooling of the upper ocean'

Author

Willis, Josh K., Lyman, John M., Johnson, Gregory C., and Gilson, John

Abstract

Two systematic biases have been discovered in the ocean temperature data used by Lyman et al. [2006]. These biases are both substantially larger than sampling errors estimated in Lyman et al. [2006], and appear to be the cause of the rapid cooling reported in that work. Index Terms. 4513 Decadal ocean variability; 1225 Global change from geodesy; 4215 Climate and interannual variability; 4262 Ocean observing systems; 1635 Oceans Keywords. global warming; heat content; climate change Most of the rapid decrease in globally integrated upper (0–750 m) ocean heat content anomalies (OHCA) between 2003 and 2005 reported by Lyman et al. [2006] appears to be an artifact resulting from the combination of two different instrument biases recently discovered in the in situ profile data. Although Lyman et al. [2006] carefully estimated sampling errors, they did not investigate potential biases among different instrument types. One such bias has been identified in a subset of Argo float profiles. This error will ultimately be corrected. However, until corrections have been made these data can be easily excluded from OHCA estimates (see http://www.argo.ucsd.edu/ for more details). Another bias was caused by eXpendable BathyThermograph (XBT) data that are systematically warm compared to other instruments [Gouretski and Koltermann, 2007]. Both biases appear to have contributed equally to the spurious cooling. Acknowledgments. JML and GCJ were supported by the NOAA Climate Program Office and the NOAA Office of Oceanic and Atmospheric Research. The findings and conclusions in this article are those of the authors and do not necessarily represent the views of the National Oceanic and Atmospheric Administration.

Published
2007

42. OCEANS MELTING GREENLAND.

Author

Fenty, Ian, Willis, Josh K., Khazendar, Ala, Dinardo, Steven, Forsberg, René, Fukumori, Ichiro, Holland, David, Jakobsson, Martin, Moller, Delwyn, Morison, James, Münchow, Andreas, Rignot, Eric, Schodlok, Michael, Thompson, Andrew F., Tinto, Kirsteen, Rutherford, Matthew, and Trenholm, Nicole

Subjects
*GLACIERS, *SEA level, *HYDROGRAPHY, *BATHYMETRIC maps, *OCEAN circulation
Abstract

Melting of the Greenland Ice Sheet represents a major uncertainty in projecting future rates of global sea level rise. Much of this uncertainty is related to a lack of knowledge about subsurface ocean hydrographic properties, particularly heat content, how these properties are modified across the continental shelf, and about the extent to which the ocean interacts with glaciers. Early results from NASA's five-year Oceans Melting Greenland (OMG) mission, based on extensive hydrographic and bathymetric surveys, suggest that many glaciers terminate in deep water and are hence vulnerable to increased melting due to ocean-ice interaction. OMG will track ocean conditions and ice loss at glaciers around Greenland through the year 2020, providing critical information about ocean-driven Greenland ice mass loss in a warming climate. [ABSTRACT FROM AUTHOR]

Published
2016
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46. The OSTM/Jason-2 Mission

Author

Lambin, Juliette, primary, Morrow, Rosemary, additional, Fu, Lee-Lueng, additional, Willis, Josh K., additional, Bonekamp, Hans, additional, Lillibridge, John, additional, Perbos, Jacqueline, additional, Zaouche, Gérard, additional, Vaze, Parag, additional, Bannoura, Walid, additional, Parisot, François, additional, Thouvenot, Eric, additional, Coutin-Faye, Sophie, additional, Lindstrom, Eric, additional, and Mignogno, Mike, additional

Published
2010
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