272 results on '"Bian, Huisheng"'
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2. Abrupt reduction in shipping emission as an inadvertent geoengineering termination shock produces substantial radiative warming
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Yuan, Tianle, Song, Hua, Oreopoulos, Lazaros, Wood, Robert, Bian, Huisheng, Breen, Katherine, Chin, Mian, Yu, Hongbin, Barahona, Donifan, Meyer, Kerry, and Platnick, Steven
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- 2024
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3. Improved simulations of biomass burning aerosol optical properties and lifetimes in the NASA GEOS Model during the ORACLES-I campaign
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Das, Sampa, primary, Colarco, Peter R., additional, Bian, Huisheng, additional, and Gassó, Santiago, additional
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- 2024
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4. Dominant role of mineral dust in cirrus cloud formation revealed by global-scale measurements
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Froyd, Karl D., Yu, Pengfei, Schill, Gregory P., Brock, Charles A., Kupc, Agnieszka, Williamson, Christina J., Jensen, Eric J., Ray, Eric, Rosenlof, Karen H., Bian, Huisheng, Darmenov, Anton S., Colarco, Peter R., Diskin, Glenn S., Bui, ThaoPaul, and Murphy, Daniel M.
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- 2022
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5. Using modelled relationships and satellite observations to attribute modelled aerosol biases over biomass burning regions
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Zhong, Qirui, Schutgens, Nick, van der Werf, Guido R., van Noije, Twan, Bauer, Susanne E., Tsigaridis, Kostas, Mielonen, Tero, Checa-Garcia, Ramiro, Neubauer, David, Kipling, Zak, Kirkevåg, Alf, Olivié, Dirk J. L., Kokkola, Harri, Matsui, Hitoshi, Ginoux, Paul, Takemura, Toshihiko, Le Sager, Philippe, Rémy, Samuel, Bian, Huisheng, and Chin, Mian
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- 2022
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6. Observationally constrained analysis of sulfur cycle in the marine atmosphere with NASA ATom measurements and AeroCom model simulations
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Bian, Huisheng, primary, Chin, Mian, additional, Colarco, Peter R., additional, Apel, Eric C., additional, Blake, Donald R., additional, Froyd, Karl, additional, Hornbrook, Rebecca S., additional, Jimenez, Jose, additional, Jost, Pedro Campuzano, additional, Lawler, Michael, additional, Liu, Mingxu, additional, Lund, Marianne Tronstad, additional, Matsui, Hitoshi, additional, Nault, Benjamin A., additional, Penner, Joyce E., additional, Rollins, Andrew W., additional, Schill, Gregory, additional, Skeie, Ragnhild B., additional, Wang, Hailong, additional, Xu, Lu, additional, Zhang, Kai, additional, and Zhu, Jialei, additional
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- 2024
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7. Reply to Comment on egusphere-2023-1966
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Bian, Huisheng, primary
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- 2023
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8. The Emissions Model Intercomparison Project (Emissions-MIP): quantifying model sensitivity to emission characteristics
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Ahsan, Hamza, primary, Wang, Hailong, additional, Wu, Jingbo, additional, Wu, Mingxuan, additional, Smith, Steven J., additional, Bauer, Susanne, additional, Suchyta, Harrison, additional, Olivié, Dirk, additional, Myhre, Gunnar, additional, Matsui, Hitoshi, additional, Bian, Huisheng, additional, Lamarque, Jean-François, additional, Carslaw, Ken, additional, Horowitz, Larry, additional, Regayre, Leighton, additional, Chin, Mian, additional, Schulz, Michael, additional, Skeie, Ragnhild Bieltvedt, additional, Takemura, Toshihiko, additional, and Naik, Vaishali, additional
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- 2023
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9. Substantial Radiative Warming by an Inadvertent Geoengineering Experiment from 2020 Fuel Regulations
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Yuan, Tianle, primary, Song, Hua, additional, Oreopoulos, Lazaros, additional, Wood, Robert, additional, Bian, Huisheng, additional, Breen, Katherine, additional, Chin, Mian, additional, Yu, Hongbin, additional, Barahona, Donifan, additional, Meyer, Kerry, additional, and Platnick, Steven, additional
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- 2023
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10. Estimate of carbonyl sulfide tropical oceanic surface fluxes using Aura Tropospheric Emission Spectrometer observations
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Kuai, Le, Worden, John R, Campbell, J Elliott, Kulawik, Susan S, Li, King‐Fai, Lee, Meemong, Weidner, Richard J, Montzka, Stephen A, Moore, Fred L, Berry, Joe A, Baker, Ian, Denning, A Scott, Bian, Huisheng, Bowman, Kevin W, Liu, Junjie, and Yung, Yuk L
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Life Below Water ,Atmospheric Sciences ,Physical Geography and Environmental Geoscience - Abstract
Quantifying the carbonyl sulfide (OCS) land/ocean fluxes contributes to the understanding of both the sulfur and carbon cycles. The primary sources and sinks of OCS are very likely in a steady state because there is no significant observed trend or interannual variability in atmospheric OCS measurements. However, the magnitude and spatial distribution of the dominant ocean source are highly uncertain due to the lack of observations. In particular, estimates of the oceanic fluxes range from approximately 280 Gg S yr-1 to greater than 800 Gg S yr-1, with the larger flux needed to balance a similarly sized terrestrial sink that is inferred from NOAA continental sites. Here we estimate summer tropical oceanic fluxes of OCS in 2006 using a linear flux inversion algorithm and new OCS data acquired by the Aura Tropospheric Emissions Spectrometer (TES). Modeled OCS concentrations based on these updated fluxes are consistent with HIAPER Pole-to-Pole Observations during 4th airborne campaign and improve significantly over the a priori model concentrations. The TES tropical ocean estimate of 70±16GgS in June,when extrapolated over the whole year (about 840 ± 192 Gg S yr-1), supports the hypothesis proposed by Berry et al. (2013) that the ocean flux is in the higher range of approximately 800 Gg S yr-1.
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- 2015
11. Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere
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Nault, Benjamin A., Campuzano-Jost, Pedro, Day, Douglas A., Jo, Duseong S., Schroder, Jason C., Allen, Hannah M., Bahreini, Roya, Bian, Huisheng, Blake, Donald R., Chin, Mian, Clegg, Simon L., Colarco, Peter R., Crounse, John D., Cubison, Michael J., DeCarlo, Peter F., Dibb, Jack E., Diskin, Glenn S., Hodzic, Alma, Hu, Weiwei, Katich, Joseph M., Kim, Michelle J., Kodros, John K., Kupc, Agnieszka, Lopez-Hilfiker, Felipe D., Marais, Eloise A., Middlebrook, Ann M., Andrew Neuman, J., Nowak, John B., Palm, Brett B., Paulot, Fabien, Pierce, Jeffrey R., Schill, Gregory P., Scheuer, Eric, Thornton, Joel A., Tsigaridis, Kostas, Wennberg, Paul O., Williamson, Christina J., and Jimenez, Jose L.
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- 2021
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12. Benchmarking GOCART-2G in the Goddard Earth Observing System (GEOS).
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Collow, Allison B., Colarco, Peter R., da Silva, Arlindo M., Buchard, Virginie, Bian, Huisheng, Chin, Mian, Das, Sampa, Govindaraju, Ravi, Kim, Dongchul, and Aquila, Valentina
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AUTUMN ,TROPOSPHERIC aerosols ,BIOMASS burning ,RADIATION chemistry ,TAIGAS ,SPRING - Abstract
The Goddard Chemistry Aerosol Radiation and Transport (GOCART) model, which controls the sources, sinks, and chemistry of aerosols within the Goddard Earth Observing System (GEOS), recently underwent a major refactoring and update, including a revision of the emissions datasets and the addition of brown carbon. A 4-year benchmark simulation utilizing the new version of the model code, termed GOCART Second Generation (GOCART-2G) and coupled to the Goddard Earth Observing System (GEOS) model, was evaluated using in situ and spaceborne measurements to develop a baseline and prioritize future development. A comparison of simulated aerosol optical depth between GOCART-2G and MODIS retrievals indicates the model captures the overall spatial pattern and seasonal cycle of aerosol optical depth but overestimates aerosol extinction over dusty regions and underestimates aerosol extinction over Northern Hemisphere boreal forests, requiring further investigation and tuning of emissions. This MODIS-based analysis is corroborated by comparisons to MISR and selected AERONET stations; however, discrepancies between the Aqua and Terra satellites indicate there is a diurnal component to biases in aerosol optical depth over southern Asia and northern Africa. Despite the underestimate of aerosol optical depth in biomass burning regions in GEOS, there is an overestimate in the surface mass of organic carbon in the United States, especially during the summer months. Over Europe, GOCART-2G is unable to match the summertime peak in aerosol optical depth, opposing the observed late fall and early spring peaks in surface mass concentration. A comparison of the vertical profile of attenuated backscatter to observations from CALIPSO indicates the GEOS model is capable of capturing the vertical profile of aerosol; however, the mid-troposphere plumes of dust in the North Atlantic and smoke in the southeastern Atlantic are perhaps too low in altitude. The results presented highlight priorities for future development with GOCART-2G, including improvements for dust, biomass burning aerosols, and anthropogenic aerosols. [ABSTRACT FROM AUTHOR]
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- 2024
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13. Supplementary material to "Benchmarking GOCART-2G in the Goddard Earth Observing System (GEOS)"
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Collow, Allison B., primary, Colarco, Peter R., additional, da Silva, Arlindo M., additional, Buchard, Virginie, additional, Bian, Huisheng, additional, Chin, Mian, additional, Das, Sampa, additional, Govidaraju, Ravi, additional, Kim, Dongchul, additional, and Aquila, Valentina, additional
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- 2023
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14. Benchmarking GOCART-2G in the Goddard Earth Observing System (GEOS)
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Collow, Allison B., primary, Colarco, Peter R., additional, da Silva, Arlindo M., additional, Buchard, Virginie, additional, Bian, Huisheng, additional, Chin, Mian, additional, Das, Sampa, additional, Govidaraju, Ravi, additional, Kim, Dongchul, additional, and Aquila, Valentina, additional
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- 2023
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15. Connection Between East Asian Air Pollution and Monsoon System
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Chin, Mian, Bian, Huisheng, Kucsera, Tom, Diehl, Thomas, Tao, Zhining, Kim, Dongchul, Pan, Xiaohua, International Space Science Institu, Editor, Bouarar, Idir, editor, Wang, Xuemei, editor, and Brasseur, Guy P., editor
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- 2017
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16. Interannual Variability of Aerosols and Co in The Upper Troposphere/Lower Stratosphere (Utls): Connection to the Climate Variability, Asian Summer Monsoon Strengths, and Emissions
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Taha, Ghassan, Santee, Michelle, Pan, Xiaohua, Tan, Qian, Bian, Huisheng, and Chin, Mian
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- 2021
17. Interannual Variability of Aerosols and Co in The Upper Troposphere/Lower Stratosphere (Utls): Connection to the Climate Variability, Asian Summer Monsoon Strengths, and Emissions
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Chin, Mian, Bian, Huisheng, Tan, Qian, Pan, Xiaohua, Santee, Michelle, and Taha, Ghassan
- Published
- 2021
18. Improved Simulations of Biomass Burning Aerosol Optical Properties and Lifetimes in the NASA GEOS Model during the ORACLES-I Campaign
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Das, Sampa, primary, Colarco, Peter, additional, Bian, Huisheng, additional, and Gasso, Santiago, additional
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- 2023
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19. Sub-seasonal variability of Asian summer monsoon transport of aerosols and CO to the UTLS in the context of recent aircraft observations in the Asia
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Chin, Mian, primary, Bian, Huisheng, additional, Colarco, Peter, additional, Lait, Leslie, additional, and Chen, Gao, additional
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- 2023
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20. Supplementary material to "The Emissions Model Intercomparison Project (Emissions-MIP): quantifying model sensitivity to emission characteristics"
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Ahsan, Hamza, primary, Wang, Hailong, additional, Wu, Jingbo, additional, Wu, Mingxuan, additional, Smith, Steven J., additional, Bauer, Susanne, additional, Suchyta, Harrison, additional, Olivié, Dirk, additional, Myhre, Gunnar, additional, Matsui, Hitoshi, additional, Bian, Huisheng, additional, Lamarque, Jean-François, additional, Carslaw, Ken, additional, Horowitz, Larry, additional, Regayre, Leighton, additional, Chin, Mian, additional, Schulz, Michael, additional, Skeie, Ragnhild Bieltvedt, additional, Takemura, Toshihiko, additional, and Naik, Vaishali, additional
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- 2023
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21. Aerosols in the Atmosphere: Sources, Transport, and Multi-decadal Trends
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Chin, Mian, Diehl, Thomas, Bian, Huisheng, Kucsera, Tom, Abarbanel, Henry, Series editor, Braha, Dan, Series editor, Érdi, Péter, Series editor, Friston, Karl, Series editor, Haken, Hermann, Series editor, Jirsa, Viktor, Series editor, Kacprzyk, Janusz, Series editor, Kaneko, Kunihiko, Series editor, Kelso, Scott, Series editor, Kirkilionis, Markus, Series editor, Kurths, Jürgen, Series editor, Nowak, Andrzej, Series editor, Qudrat-Ullah, Hassan, Series editor, Reichl, Linda, Series editor, Schuster, Peter, Series editor, Schweitzer, Frank, Series editor, Sornette, Didier, Series editor, Thurner, Stefan, Series editor, Steyn, Douw G., editor, and Chaumerliac, Nadine, editor
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- 2016
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22. Role of surface wind and vegetation cover in multi-decadal variations of dust emission in the Sahara and Sahel
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Kim, Dongchul, Chin, Mian, Remer, Lorraine A., Diehl, Thomas, Bian, Huisheng, Yu, Hongbin, Brown, Molly E., and Stockwell, William R.
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- 2017
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23. Role of ammonia chemistry and coarse mode aerosols in global climatological inorganic aerosol distributions
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Luo, Chao, Zender, Charles S, Bian, Huisheng, and Metzger, Swen
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aerosol thermodynamics ,gas/aerosol partitioning ,ammonia chemistry ,global chemical transport model ,inorganic aerosol compositions - Abstract
We use an inorganic aerosol thermodynamic equilibrium model in a three-dimensional chemical transport model to understand the roles of ammonia chemistry and natural aerosols on the global distribution of aerosols. The thermodynamic equilibrium model partitions gas-phase precursors among modeled aerosol species self-consistently with ambient relative humidity and natural and anthropogenic aerosol emissions during the 1990s.Model simulations show that accounting for aerosol inorganic thermodynamic equilibrium, ammonia chemistry and dust and sea-salt aerosols improve agreement with observed SO4, NO3, and NH4 aerosols especially at North American sites. This study shows that the presence of sea salt, dust aerosol and ammonia chemistry significantly increases sulfate over polluted continental regions. In all regions and seasons, representation of ammonia chemistry is required to obtain reasonable agreement between modeled and observed sulfate and nitrate concentrations. Observed and modeled correlations of sulfate and nitrate with ammonium confirm that the sulfate and nitrate are strongly coupled with ammonium. SO4concentrations over East China peak in winter, while North American SO4 peaks in summer. Seasonal variations of NO3 and SO4 are the same in East China. In North America, the seasonal variation is much stronger for NO3 than SO4 and peaks in winter.Natural sea salt and dust aerosol significantly alter the regional distributions of other aerosols in three main ways. First, they increase sulfate formation by 10–70% in polluted areas. Second, they increase modeled nitrate over oceans and reduce nitrate over Northern hemisphere continents. Third, they reduce ammonium formation over oceans and increase ammonium over Northern Hemisphere continents. Comparisons of SO4, NO3 and NH4 deposition between pre-industrial, present, and year 2100 scenarios show that the present NO3and NH4 deposition are twice pre-industrial deposition and present SO4 deposition is almost five times pre-industrial deposition.
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- 2007
24. Improved Simulations of Biomass Burning Aerosol Optical Properties and Lifetimes in the NASA GEOS Model during the ORACLES-I Campaign
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Das, Sampa, Colarco, Peter, Bian, Huisheng, and Gasso, Santiago
- Abstract
In order to improve aerosol representation in the NASA Goddard Earth Observing System (GEOS) model, we evaluated simulations of the aerosol properties and transport over the southern African biomass burning source and outflow region using observations made during the first deployment of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) field campaign in September 2016. An example case study of September 24 was analyzed in detail, during which aircraft-based in-situ and remote sensing observations showed the presence of a multi-layered smoke plume structure with significant vertical variation in single scattering albedo (SSA). Our baseline GEOS simulations were not able to represent the observed SSA variation, nor the observed organic aerosol-to-black carbon ratio (OA : BC). Analyzing the simulated smoke age suggests that the higher altitude, less absorbing smoke plume was younger (~4 days), while the lower altitude and more absorbing smoke plume was older (~7 days). We hypothesize a chemical or microphysical loss process exists to explain the change in aerosol absorption as the smoke plume ages, and we apply a simple 6-day e-folding loss rate to the model hydrophilic biomass burning OA to mimic this process. Adding this loss process required some adjustment to the model assumed scaling factors of aerosol emissions to conserve the regional aerosol loading and further improve the simulated OA : BC ratio. Accordingly, we have increased our biomass burning emissions of OA by 60 % and biomass burning BC by 15 %. We also utilized the ORACLES airborne observations to better constrain the simulation of aerosol optical properties, adjusting the assumed particle size, hygroscopic growth, and absorption. Our final GEOS model simulation with additional OA loss and updated optics showed a better performance in simulating AOD and SSA compared to independent ground and space-based retrievals for the entire month of September 2016, including the OMI Aerosol Index. In terms of radiative implications of our model adjustments, the final GEOS simulation suggested a decreased atmospheric warming of about 10 % (~2 W m-2) over the south-east Atlantic region and above the stratocumulus cloud decks compared to the model baseline simulations. These results improve the representation of the smoke age, transport, and optical properties in Earth system models.
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- 2023
25. Mineral dust and global tropospheric chemistry: Relative roles of photolysis and heterogeneous uptake
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Bian, Huisheng and Zender, C. S.
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tropospheric chemistry ,mineral dust ,photolysis impact ,heterogeneous reaction - Abstract
We investigate the influence of mineral dust on tropospheric chemistry in the present climate at the global scale. The analysis examines the effects of dust on photolysis and heterogeneous uptake, operating independently and together. In numerical experiments the size-resolved, time-varying mineral dust distribution predicted by the global Dust Entrainment and Deposition (DEAD) model perturbs the gas phase species in a global chemical transport model (University of California at Irvine (UCI) CTM). We find that the photolysis perturbation dominates limited regions in the low to middle troposphere, while heterogeneous uptake dominates the rest of atmosphere. Coupling of the photochemical and heterogeneous effects of dust is weak in the global mean but moderate in dusty regions, where coupling is sometimes responsible for more than 20% of local O3 changes. Ozone and odd-nitrogen concentrations are perturbed in opposite directions by photolysis and heterogeneous chemistry, resulting in a weak net change. However, both processes decrease the concentrations of OH and HO2. The global mean change due to dust is −0.7% for tropospheric O3, −11.1% for OH, −5.2% for HO2, and −3.5% for HNO3. Large seasonal signals are present near dust source regions. Over the North African region and tropical Atlantic Ocean downwind, OH decreases by −66.8%, six times more than the global mean reduction. Interestingly, net photolysis-induced annual mean O3 changes are greater in the Southern Hemisphere than in the Northern Hemisphere, where significantly more dust and O3 precursors reside. In polar regions, O3 change is dominated by transported O3 and is not sensitive to local dust concentration. O3 change due to photolysis depends not only on dust vertical structure but also on the availability of O3 precursors. O3 change due to heterogeneous reactions on dust is sensitive to dust vertical structure, mainly through the influence of temperature on uptake rates.
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- 2003
26. Tropospheric aerosol impacts on trace gas budgets through photolysis
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Bian, Huisheng, Prather, M J, and Takemura, T
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aerosol ,chemical transport model ,indirect forcing ,photolysis ,tropospheric chemistry - Abstract
Aerosols affect the global budgets of O3, OH, and CH4 in part through their alteration of photolysis rates and in part through their direct chemical interactions with gases (i.e., “heterogeneous chemistry”). The first effect is evaluated here with a global tropospheric chemistry transport model using recently developed global climatologies of tropospheric aerosols: a satellite-derived aerosol climatology over the oceans by advanced very high resolution radiometer and a model-generated climatology for land plus oceans by the Center for Climate System Research. Globally averaged, the impact of aerosols on photolysis alone is to increase tropospheric O3 by 0.63 Dobson units and increase tropospheric CH4 by 130 ppb (via tropospheric OH decreases of 8%). These greenhouse gas increases lead to an aerosol indirect effect (counting both natural and anthropogenic aerosols) of +0.08 W/m2. Although the CH4 increases are, of course, global, the changes in tropospheric OH and O3 are mainly regional, with the largest impacts in northwest Africa for January and in India and southern Africa for July. The influence of aerosols is greater in July than in January and greater in the Northern Hemisphere than in the Southern Hemisphere, as expected given the pollution sources in the Northern Hemisphere. The predominant impact is due to the aerosols over land; aerosols over the ocean contribute less than a third to globally integrated changes.
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- 2003
27. Fast-J2: Accurate Simulation of Stratospheric Photolysis in Global Chemical Models
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Bian, Huisheng and Prather, Michael J
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chemical transport modeling ,photolysis rates ,stratospheric chemistry - Abstract
Modeling photochemistry in the stratosphere requires solution of the equationof radiative transfer over an extreme range of wavelengths and atmosphericconditions, from transmission through the Schumann–Runge bands ofO2 in the mesosphere, to multiple scattering from troposphericclouds and aerosols. The complexity and range of conditions makes photolysiscalculations in 3-D chemical transport models computationally expensive. Thisstudy pesents a fast and accurate numerical method, Fast-J2, for calculatingphotolysis rates (J-values) and the deposition of solar flux in stratosphere.Fast-J2 develops an optimized, super-wide 11-bin quadrature for wavelengthsfrom 177 to 291 nm that concatenates with the 7-bin quadrature (291–850nm) already developed for the troposphere as Fast-J. Below 291 nm the effectsof Rayleigh scattering are implemented as a pseudo-absorption, and above 291nm the full multiple-scattering code of Fast-J is used. Fast-J2 calculates themean ultraviolet-visible radiation field for these 18 wavelength binsthroughout the stratosphere, and thus new species and new cross sections canbe readily implemented. In comparison with a standard, high-resolution,multiple-scattering photolysis model, worst-case errors in Fast-J2 do notexceed 5% over a wide range of solar zenith angles, altitudes(0–60 km), latitudes, and seasons where the rates are important inphotochemistry.
- Published
- 2002
28. Observationally constrained analysis of sulfur species in the marine troposphere
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Bian, Huisheng, primary, Chin, Mian, additional, Colarco, Peter, additional, Liu, Mingxu, additional, Tronstad Lund, Marianne, additional, Matshi, Hitoshi, additional, Penner, Joyce, additional, Wang, Hailong, additional, Zhang, Kai, additional, and Zhu, Jialei, additional
- Published
- 2023
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29. The 2022 Asian Summer Monsoon Transport and its Connection to the 2005-2021 Climatology as Illustrated by Carbon Monoxide
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Liang, Qing, primary, Bian, Huisheng, additional, Chin, Mian, additional, Pan, Laura, additional, Newman, Paul, additional, Kinnison, Doug, additional, and Liang, Qing, additional
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- 2023
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30. Monthly stable isotope records in an Australian coral and their correspondence with environmental variables
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Bian, Huisheng and Druffel, Ellen R. M
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Monthly skeletal stable isotope measurements of a Porites australiensis coral from Abraham Reef, Australia, spanning the period from 1981 to 1991, are compared with monthly averaged SST (sea surface temperature) from satellite collected AVHRR (Advanced Very High Resolution Radiometer) and monthly downward surface short-wave insolation (SSI) measurements. We found that the δ18O values varied as a function of the change in seawater temperature. There were anomalously high δ18O values in coral that grew during the summer season of the three El Niño events 1982–83, 1987, and 1991. Advection of seawater with higher salinity (and higher δ18O values) to our site or discrepancies between ocean skin temperature and mixed layer SST are likely reasons for the reduced resolution of δ18O-based SST. Increased coral δ13C values occurred simultaneously with increases in SSI. During most El Niño events the maximum and minimum δ13C values were lower than during normal years.
- Published
- 1999
31. Observationally constrained analysis of sulfur cycle in the marine atmosphere with NASA ATom measurements and AeroCom model simulations.
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Bian, Huisheng, Chin, Mian, Colarco, Peter R., Apel, Eric C., Blake, Donald R., Froyd, Karl, Hornbrook, Rebecca S., Jimenez, Jose, Jost, Pedro Campuzano, Lawler, Michael, Liu, Mingxu, Lund, Marianne Tronstad, Matsui, Hitoshi, Nault, Benjamin A., Penner, Joyce E., Rollins, Andrew W., Schill, Gregory, Skeie, Ragnhild B., Wang, Hailong, and Xu, Lu
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SULFUR cycle ,ARTIFICIAL satellite tracking ,DIMETHYL sulfide ,ATOMS ,ATMOSPHERE ,SULFUR dioxide - Abstract
The sulfur cycle plays a key role in atmospheric air quality, climate, and ecosystems. In this study, we compare the spatial and temporal distribution of four sulfur-containing species, dimethyl sulfide (DMS), sulfur dioxide (SO
2 ), particulate methanesulfonate (MSA), and particulate sulfate (SO4 ), that were measured during the airborne NASA Atmospheric Tomography (ATom) mission and simulated by five AeroCom-III models to analyze the budget of sulfur cycle from the models. This study focuses on remote regions over the Pacific, Atlantic, and Southern Oceans from near the ocean surface to ~12-km altitude range, and covers all four seasons. These regions provide us with highly heterogeneous natural and anthropogenic source environments, which is not usually the case for traditional continental studies. We examine the vertical and seasonal variations of these sulfur species over tropical, mid-, and high-latitude regions in both hemispheres. We identify their origins from land versus ocean and from anthropogenic versus natural sources with sensitivity studies by applying tagged tracers linking to emission types and regions. In general, the differences among model results can be greater than one-order of magnitude. Comparing with observations, simulated SO2 is generally low while SO4 is high, and the model-observation agreement is much better in ATom-4 (April–May, 2018). There are much larger DMS concentrations simulated close to the sea surface than observed, indicating that the DMS emissions may be too high from all models. Anthropogenic emissions are the dominant source (40–60 % of the total amount) for atmospheric sulfate simulated at locations and times along the ATom flight tracks at almost every altitude, followed by volcanic emissions (18–32 %) and oceanic sources (16–32 %). Similar source contributions can also be derived at broad ocean basin and monthly scales, indicating that any reductions of anthropogenic sulfur emissions would have global impacts in modern times. [ABSTRACT FROM AUTHOR]- Published
- 2023
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32. Quantification of trans-Atlantic dust transport from seven-year (2007–2013) record of CALIPSO lidar measurements
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Yu, Hongbin, Chin, Mian, Bian, Huisheng, Yuan, Tianle, Prospero, Joseph M., Omar, Ali H., Remer, Lorraine A., Winker, David M., Yang, Yuekui, Zhang, Yan, and Zhang, Zhibo
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- 2015
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33. NASA GEOS Aerosol Modeling and Assimilation Activities
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Castellanos, Patricia, Da Silva, Arlindo, Anton Darmenov, Buchard, Virginie, Govindaraju, Ravi, Bian, Huisheng, Colarco, Peter, Das, Sampa, Nowottnick, Ed, Rocha Lima, Adrianna, Levy, Robert, Mattoo, Shana, Aquila, Valentina, and Case, Parker
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Geosciences (General) - Abstract
The current assimilation of Aerosol Optical Depth (AOD) in GEOS involves very careful cloud screening and homogenization of the observing system by means of a neural network that translates satellite reflectances from MODIS into AERONET calibrated AOD. In this talk we will present an update of the GEOS aerosol assimilation system, with emphasis on the improved treatment of MODIS observations. We will then proceed to assess the impact of geostationary aerosol observations from the ABI and AHI sensors on the GOES-16 and Himawari-8 satellites. The GEOS assimilated aerosol fields will be validated by comparison to independent in-situ and remotely-sensed measurements (PM2.5 concentrations, surface dust concentrations, Maritime Aerosol Network, airborne and ground based lidars, UV based measurements, etc.).
- Published
- 2019
34. How Well Does NASA GEOS Model Perform in Simulating Dust Deposition into the Tropical Atlantic Ocean?
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Yu, Hongbin, Bian, Huisheng, Tan, Qian, Chin, Mian, Kim, Dongchul, and Ginoux, Paul
- Subjects
Geosciences (General) - Abstract
Massive dust emitted from North Africa can transport long distances across the tropical Atlantic Ocean, reaching the Americas. Dust deposition along the transit adds microorganisms and essential nutrients to marine ecosystem, which has important implications for biogeochemical cycle and climate. However, assessing the dust-ecosystemclimate interactions has been hindered in part by the paucity of dust deposition measurements and large uncertainties associated with oversimplified representations of dust processes in current models. We have recently produced a unique dataset of seasonal dust deposition flux and dust loss frequency into the tropical Atlantic Ocean at a nominal resolution of 200 km x 500 km by using the decade-long (2007-2016) record of aerosol three-dimensional distribution from four satellite sensors, namely CALIOP, MODIS, MISR, and IASI. On the basis of the ten-year average, the yearly dust deposition into the tropical Atlantic Ocean is estimated at 98-153 Tg. The dust deposition shows large spatial and temporal (on seasonal and interannual scale) variability. The satellite observations also yield an estimate of annual mean dust loss frequency of 0.052 ~ 0.078 d-1, a useful diagnostic that makes it possible to disentangle the dust transport and removal processes from the dust emissions when identifying the major factors contributing to the uncertainties and biases in the model simulated dust deposition. In this study, we use the dataset along with in situ and remote sensing observations to assess how well NASA GEOS model performs in simulating trans-Atlantic dust transport and deposition. We found that the GEOS modeling of dust deposition falls within the range of satellite-based estimates. However, this reasonable agreement in dust deposition is a compensation of the model's underestimate of dust emissions and overestimate of dust removal efficiency. Further, the overestimate of dust removal efficiency results largely from the model's overestimate of rainfall rate. Our results provide insights into the model's deficiencies at process level, which could better guide model improvements.
- Published
- 2019
35. A New Global Anthropogenic SO2 Emission Inventory for the Last Decade: A Mosaic of Satellite-Derived and Bottom-Up Emissions
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Liu, Fei, Choi, Sungyeon, Li, Can, Fioletov, Vitali E, McLinden, Chris A, Joiner, Joanna, Krotkov, Nickolay A, Bian, Huisheng, Janssens-Maenhout, Greet, Darmenov, Anton S, and da Silva, Arlindo M
- Subjects
Earth Resources And Remote Sensing ,Environment Pollution - Abstract
Sulfur dioxide (SO2) measurements from the Ozone Monitoring Instrument (OMI) satellite sensor have been used to detect emissions from large point sources. Emissions from over 400 sources have been quantified individually based on OMI observations, accounting for about a half of total reported anthropogenic SO2 emissions. Here we report a newly developed emission inventory, OMI-HTAP, by combining these OMI-based emission estimates and the conventional bottom-up inventory, HTAP, for smaller sources that OMI is not able to detect. OMI-HTAP includes emissions from OMI-detected sources that are not captured in previous leading bottom-up inventories, enabling more accurate emission estimates for regions with such missing sources. In addition, our approach offers the possibility of rapid updates to emissions from large point sources that can be detected by satellites. Our methodology applied to OMI-HTAP can also be used to merge improved satellite-derived estimates with other multi-year bottom-up inventories, which may further improve the accuracy of the emission trends. OMI-HTAP SO2 emissions estimates for Persian Gulf, Mexico, and Russia are 59%, 65%, and 56% larger than HTAP estimates, respectively, in year 2010. We have evaluated the OMI-HTAP inventory by performing simulations with the Goddard Earth Observing System version 5 (GEOS-5) model. The GEOS-5 simulated SO2 concentrations driven by both HTAP and OMI-HTAP were compared against in situ measurements. We focus for the validation on year 2010 for which HTAP is most valid and for which a relatively large number of in situ measurements are available. Results show that the OMI-HTAP inventory improves the agreement between the model and observations, in particular over the US, with the normalized mean bias decreasing from 0.41 (HTAP) to -0.03 (OMI-HTAP) for year 2010. Simulations with the OMI-HTAP inventory capture the worldwide major trends of large anthropogenic SO2 emissions that are observed with OMI. Correlation coefficients of the observed and modelled surface SO2 in 2014 increase from 0.16 (HTAP) to 0.59 (OMI-HTAP) and the normalized mean bias dropped from 0.29 (HTAP) to 0.05 (OMI-HTAP), when we updated 2010 HTAP emissions with 2014 OMI-HTAP emissions in the model.
- Published
- 2018
- Full Text
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36. Representativeness of CO and O3 Along ATom Transects Derived from GEOS-5 and GMI-CTM Simulations
- Author
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Liu, Junhua, Strode, Sarah A, Prather, Michael J, Lait, Leslie R, Conaty, Austin, Damon, Megan, Steenrod, Stephen, Newman, Paul A, Commane, Roisin, Daube, Bruce, Wofsy, Steven, Ryerson, Tom, Thompson, Chelsea, Peischl, Jeff, Olsen, Mark, Manney, Gloria, Bian, Huisheng, and Strahan, Susan
- Subjects
Geophysics - Abstract
One major goal for the NASA Atmospheric Tomography Mission (ATom) is producing an observation-based chemical climatology to represent the atmospheric heterogeneity. In this study, we use CO and O3 observations and global atmospheric model simulations to examine the spatial representativeness of the ATom-1 and -2 transects within a 4D framework provided by the NASA GEOS-5 and GMI-CTM models. Based on the probability density functions, we find that the variability of CO and O3 along the flight tracks is well hindcast by the model when sampled per ATom flights. The CO variations along the ATom-transect are likely representative of the typical CO variations over the whole Pacific basin during both the ATom-1 and -2 periods, the northern Atlantic during the ATom-1 period, and the tropical Atlantic in the ATom-2 period. Over southern Atlantic, CO along the ATom-1 transects is likely less well mixed than that of the broader region, but is still representative of the median CO concentration. CO along the ATom-2 transect is likely higher than the median CO concentration over this region. For O3, the agreements between PDFs of O3 sampled along the ATom transects and over the broader regions are fair to good over all six regions (Scores > 0.65) with notable discrepancies over some regions. For example, in ATom-1 over the northern Pacific and Atlantic, the transect samples air masses with higher O3 levels. During ATom-2, the transect over-represents the occurrence of O3 plumes over tropical Pacific. Over the southern Pacific and Atlantic for both ATom-1 and -2, the transects have a less uniform distribution compared to the surrounding basins, but still represent the median O3 abundance. Overall, we conclude in most cases that ATom measurements represent the statistical variations of these two species over the ocean basins at the time of measurement. Higher-order statistics, including covariance of species, has not been tested in this study.
- Published
- 2018
37. Satellite-based evaluation of AeroCom model bias in biomass burning regions
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Zhong, Qirui, primary, Schutgens, Nick, additional, van der Werf, Guido, additional, van Noije, Twan, additional, Tsigaridis, Kostas, additional, Bauer, Susanne E., additional, Mielonen, Tero, additional, Kirkevåg, Alf, additional, Seland, Øyvind, additional, Kokkola, Harri, additional, Checa-Garcia, Ramiro, additional, Neubauer, David, additional, Kipling, Zak, additional, Matsui, Hitoshi, additional, Ginoux, Paul, additional, Takemura, Toshihiko, additional, Le Sager, Philippe, additional, Rémy, Samuel, additional, Bian, Huisheng, additional, Chin, Mian, additional, Zhang, Kai, additional, Zhu, Jialei, additional, Tsyro, Svetlana G., additional, Curci, Gabriele, additional, Protonotariou, Anna, additional, Johnson, Ben, additional, Penner, Joyce E., additional, Bellouin, Nicolas, additional, Skeie, Ragnhild B., additional, and Myhre, Gunnar, additional
- Published
- 2022
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38. The Emissions Model Intercomparison Project (Emissions-MIP): quantifying model sensitivity to emission characteristics.
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Ahsan, Hamza, Wang, Hailong, Wu, Jingbo, Wu, Mingxuan, Smith, Steven J., Bauer, Susanne, Suchyta, Harrison, Olivié, Dirk, Myhre, Gunnar, Matsui, Hitoshi, Bian, Huisheng, Lamarque, Jean-François, Carslaw, Ken, Horowitz, Larry, Regayre, Leighton, Chin, Mian, Schulz, Michael, Skeie, Ragnhild Bieltvedt, Takemura, Toshihiko, and Naik, Vaishali
- Subjects
ATMOSPHERIC chemistry ,ATMOSPHERIC models ,CHEMICAL models ,ATMOSPHERIC transport ,HUMAN ecology ,TROPOSPHERIC aerosols ,CARBONACEOUS aerosols - Abstract
Anthropogenic emissions of aerosols and precursor compounds are known to significantly affect the energy balance of the Earth-atmosphere system, alter the formation of clouds and precipitation, and have substantial impact on human health and the environment. Global models are an essential tool for examining the impacts of these emissions. In this study, we examine the sensitivity of model results to the assumed height of SO
2 injection, seasonality of SO2 and BC emissions, and the assumed fraction of SO2 emissions that is injected into the atmosphere as SO4 in 11 climate and chemistry models, including both chemical transport models and the atmospheric component of Earth system models. We find a large variation in atmospheric lifetime across models for SO2 , SO4 , and BC, with a particularly large relative variation for SO2 , which indicates that fundamental aspects of atmospheric sulfur chemistry remain uncertain. Of the perturbations examined in this study, the assumed height of SO2 injection had the largest overall impacts, particularly on global mean net radiative flux (maximum difference of -0.35 W m-2 ), SO2 lifetime over northern hemisphere land (maximum difference of 0.8 days), surface SO2 concentration (up to 59 % decrease), and surface sulfate concentration (up to 23 % increase). Emitting SO2 at height consistently increased SO2 and SO4 column burdens and shortwave cooling, with varying magnitudes, but had inconsistent effects across models on the sign of the change in implied cloud forcing. The assumed SO4 emission fraction also had a significant impact on net radiative flux and surface sulfate concentration. Because these properties are not standardized across models this is a source of inter-model diversity typically neglected in model intercomparisons. These results imply a need to assure that anthropogenic emission injection height and SO4 emission fraction are accurately and consistently represented in global models. [ABSTRACT FROM AUTHOR]- Published
- 2023
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39. Interactions Between Asian Air Pollution and Monsoon System: South Asia (ROSES-2014 ACMAP)
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Pan, Xiaohua, Chin, Mian, Tao, Zhining, Kim, Dongchul, Bian, Huisheng, and Kucsera, Tom
- Subjects
Geosciences (General) - Abstract
Asia's rapid economic growth over the past several decades has brought a remarkable increase in air pollution levels in that region. High concentrations of aerosols (also known as particulate matter or PM) from pollution sources pose major health hazards to half of the world population in Asia including South Asia. How do pollution and dust aerosols regulate the monsoon circulation and rainfall via scattering and absorbing solar radiation, changing the atmospheric heating rates, and modifying the cloud properties? We conducted a series of regional model experiments with NASA-Unified Weather Research and Forecast (NUWRF) regional model with coupled aerosol-chemistry-radiation-microphysics processes over South Asia for winter, pre-monsoon, and monsoon seasons to address this question. This study investigates the worsening air quality problem in South Asia by focusing on the interactions between pollution and South Asian monsoon, not merely focusing on the increase of pollutant emissions.
- Published
- 2018
40. Investigation of Global Particulate Nitrate from the AeroCom Phase III Experiment
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Bian, Huisheng, Chin, Mian, Hauglustaine, Didier A, Schulz, Michael, Myhre, Gunnar, Bauer, Susanne E, Lund, Marianne T, Karydis, Vlassis A, Kucsera, Tom L, Pan, Xiaohua, Pozzer, Andrea, Skeie, Ragnhild B, Steenrod, Stephen D, Sudo, Kengo, Tsigaridis, Kostas, Tsimpidi, Alexandra P, and Tsyro, Svetlana G
- Subjects
Geophysics - Abstract
An assessment of global particulate nitrate and ammonium aerosol based on simulations from nine models participating in the Aerosol Comparisons between Observations and Models (AeroCom) phase III study is presented. A budget analysis was conducted to understand the typical magnitude, distribution, and diversity of the aerosols and their precursors among the models. To gain confidence regarding model performance, the model results were evaluated with various observations globally, including ground station measurements over North America, Europe, and east Asia for tracer concentrations and dry and wet depositions, as well as with aircraft measurements in the Northern Hemisphere mid-to-high latitudes for tracer vertical distributions. Given the unique chemical and physical features of the nitrate occurrence, we further investigated the similarity and differentiation among the models by examining (1) the pH-dependent NH3 wet deposition; (2) the nitrate formation via heterogeneous chemistry on the surface of dust and sea salt particles or thermodynamic equilibrium calculation including dust and sea salt ions; and (3) the nitrate coarse-mode fraction (i.e., coarse/total). It is found that HNO3, which is simulated explicitly based on full O3-HOx-NOx-aerosol chemistry by all models, differs by up to a factor of 9 among the models in its global tropospheric burden. This partially contributes to a large difference in NO3(-), whose atmospheric burden differs by up to a factor of 13. The atmospheric burdens of NH3 and NHC 4 differ by 17 and 4, respectively. Analyses at the process level show that the large diversity in atmospheric burdens of NO3(-), NH3, and NHC4(+) is also related to deposition processes. Wet deposition seems to be the dominant process in determining the diversity in NH3 and NHC 4 lifetimes. It is critical to correctly account for contributions of heterogeneous chemical production of nitrate on dust and sea salt, because this process overwhelmingly controls atmospheric nitrate production (typically greater than 80 %) and determines the coarse- and fine-mode distribution of nitrate aerosol.
- Published
- 2017
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41. Aerosols at the Poles: An Aerocom Phase II Multi-Model Evaluation
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Sand, Maria, Bauer, Susanne E, Samset, Bjorn H, Balkanski, Yves, Bellouin, Nicolas, Berntsen, Terje K, Bian, Huisheng, Chin, Mian, Diehl, Thomas, Easter, Richard, Ghan, Steven J, Iversen, Trond, Kirkevag, Alf, Lamarque, Jean-Francois, Lin, Guangxing, Liu, Xiaohong, Luo, Gan, Myhre, Gunnar, van Noije, Twan, Penner, Joyce E, Schulz, Michael, Seland, Oyvind, Skeie, Ragnhild B, Stier, Philip, Takemura, Toshihiko, Tsigaridis, Kostas, Yu, Fangqun, Zhang, Kai, and Zhang, Hua
- Subjects
Meteorology And Climatology ,Earth Resources And Remote Sensing - Abstract
Atmospheric aerosols from anthropogenic and natural sources reach the polar regions through long-range transport and affect the local radiation balance. Such transport is, however, poorly constrained in present-day global climate models, and few multi-model evaluations of polar anthropogenic aerosol radiative forcing exist. Here we compare the aerosol optical depth (AOD) at 550 nm from simulations with 16 global aerosol models from the AeroCom Phase II model intercomparison project with available observations at both poles. We show that the annual mean multi-model median is representative of the observations in Arctic, but that the intermodel spread is large. We also document the geographical distribution and seasonal cycle of the AOD for the individual aerosol species: black carbon (BC) from fossil fuel and biomass burning, sulfate, organic aerosols (OAs), dust, and sea-salt. For a subset of models that represent nitrate and secondary organic aerosols (SOAs), we document the role of these aerosols at high latitudes. The seasonal dependence of natural and anthropogenic aerosols differs with natural aerosols peaking in winter (seasalt) and spring (dust), whereas AOD from anthropogenic aerosols peaks in late spring and summer. The models produce a median annual mean AOD of 0.07 in the Arctic (defined here as north of 60 degrees N). The models also predict a noteworthy aerosol transport to the Antarctic (south of 70 degrees S) with a resulting AOD varying between 0.01 and 0.02. The models have estimated the shortwave anthropogenic radiative forcing contributions to the direct aerosol effect (DAE) associated with BC and OA from fossil fuel and biofuel (FF), sulfate, SOAs, nitrate, and biomass burning from BC and OA emissions combined. The Arctic modelled annual mean DAE is slightly negative (-0.12 W m(exp. -2), dominated by a positive BC FF DAE in spring and a negative sulfate DAE in summer. The Antarctic DAE is governed by BC FF. We perform sensitivity experiments with one of the AeroCom models (GISS modelE) to investigate how regional emissions of BC and sulfate and the lifetime of BC influence the Arctic and Antarctic AOD. A doubling of emissions in eastern Asia results in a 33 percent increase in Arctic AOD of BC. A doubling of the BC lifetime results in a 39 percent increase in Arctic AOD of BC. However, these radical changes still fall within the AeroCom model range.
- Published
- 2017
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42. Satellite-based Estimates of Dust Deposition Into Tropical Atlantic Ocean
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Yu, Hongbin, Chin, Mian, Tan, Qian, Zhang, Zhibo, Song, Qianqian, Kim, Dongchul, Bian, Huisheng, and Yuan, Tianle
- Subjects
Earth Resources And Remote Sensing - Published
- 2017
43. Aerosol‐Radiation Interactions in China in Winter: Competing Effects of Reduced Shortwave Radiation and Cloud‐Snowfall‐Albedo Feedbacks Under Rapidly Changing Emissions
- Author
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Moch, Jonathan M., primary, Mickley, Loretta J., additional, Keller, Christoph A., additional, Bian, Huisheng, additional, Lundgren, Elizabeth W., additional, Zhai, Shixian, additional, and Jacob, Daniel J., additional
- Published
- 2022
- Full Text
- View/download PDF
44. THE NASA ATMOSPHERIC TOMOGRAPHY (ATom) MISSION: Imaging the Chemistry of the Global Atmosphere
- Author
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Thompson, Chelsea R., Wofsy, Steven C., Prather, Michael J., Newman, Paul A., Bian, Huisheng, Hannun, Reem, Clair, Jason St., and Et Al
- Abstract
Authors: Chelsea R. Thompson, Steven C. Wofsy, Michael J. Prather, Paul A. Newman, Thomas F. Hanisco, Thomas B. Ryerson, David W. Fahey, Eric C. Apel, Charles A. Brock, William H. Brune, Karl Froyd, Joseph M. Katich, Julie M. Nicely, Jeff Peischl, Eric Ray, Patrick R. Veres, Siyuan Wang, Hannah M. Allen, Elizabeth Asher, Huisheng Bian, Donald Blake, Ilann Bourgeois, John Budney, T. Paul Bui, Amy Butler, Pedro Campuzano-Jost, Cecilia Chang, Mian Chin, Róisín Commane, Gus Correa, John D. Crounse, Bruce Daube, Jack E. Dibb, Joshua P. DiGangi, Glenn S. Diskin, Maximilian Dollner, James W. Elkins, Arlene M. Fiore, Clare M. Flynn, Hao Guo, Samuel R. Hall, Reem A. Hannun, Alan Hills, Eric J. Hintsa, Alma Hodzic, Rebecca S. Hornbrook, L. Greg Huey, Jose L. Jimenez, Ralph F. Keeling, Michelle J. Kim, Agnieszka Kupc, Forrest Lacey, Leslie R. Lait, Jean-Francois Lamarque, Junhua Liu, Kathryn McKain, Simone Meinardi, David O. Miller, Stephen A. Montzka, Fred L. Moore, Eric J. Morgan, Daniel M. Murphy, Lee T. Murray, Benjamin A. Nault, J. Andrew Neuman, Louis Nguyen, Yenny Gonzalez, Andrew Rollins, Karen Rosenlof, Maryann Sargent, Gregory Schill, Joshua P. Schwarz, Jason M. St. Clair, Stephen D. Steenrod, Britton B. Stephens, Susan E. Strahan, Sarah A. Strode, Colm Sweeney, Alexander B. Thames, Kirk Ullmann, Nicholas Wagner, Rodney Weber, Bernadett Weinzierl, Paul O. Wennberg, Christina J. Williamson, Glenn M. Wolfe, and Linghan Zeng, This article provides an overview of the NASA Atmospheric Tomography (ATom) mission and a summary of selected scientific findings to date. ATom was an airborne measurements and modeling campaign aimed at characterizing the composition and chemistry of the troposphere over the most remote regions of the Pacific, Southern, Atlantic, and Arctic Oceans, and examining the impact of anthropogenic and natural emissions on a global scale. These remote regions dominate global chemical reactivity and are exceptionally important for global air quality and climate. ATom data provide the in situ measurements needed to understand the range of chemical species and their reactions, and to test satellite remote sensing observations and global models over large regions of the remote atmosphere. Lack of data in these regions, particularly over the oceans, has limited our understanding of how atmospheric composition is changing in response to shifting anthropogenic emissions and physical climate change. ATom was designed as a global-scale tomographic sampling mission with extensive geographic and seasonal coverage, tropospheric vertical profiling, and detailed speciation of reactive compounds and pollution tracers. ATom flew the NASA DC-8 research aircraft over four seasons to collect a comprehensive suite of measurements of gases, aerosols, and radical species from the remote troposphere and lower stratosphere on four global circuits from 2016 to 2018. Flights maintained near-continuous vertical profiling of 0.15–13-km altitudes on long meridional transects of the Pacific and Atlantic Ocean basins. Analysis and modeling of ATom data have led to the significant early findings highlighted here.
- Published
- 2022
- Full Text
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45. Aerosols from Overseas Rival Domestic Emissions over North America
- Author
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Yu, Hongbin, Remer, Lorraine A., Chin, Mian, Bian, Huisheng, Tan, Qian, Yuan, Tianle, and Zhang, Yan
- Published
- 2012
- Full Text
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46. Update on the NASA GEOS-5 Aerosol Forecasting and Data Assimilation System
- Author
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Colarco, Peter, da Silva, Arlindo, Aquila, Valentina, Bian, Huisheng, Buchard, Virginie, Castellanos, Patricia, Darmenov, Anton, Follette-Cook, Melanie, Govindaraju, Ravi, Keller, Christoph, Knowland, Emma, Nowottnick, Ed, and Rocha-Lima, Adriana
- Subjects
Geophysics ,Meteorology And Climatology - Abstract
GEOS-5 is the Goddard Earth Observing System model. GEOS-5 is maintained by the NASA Global Modeling and Assimilation Office. Core development is within GMAO,Goddard Atmospheric Chemistry and Dynamics Laboratory, and with external partners. Primary GEOS-5 functions: Earth system model for studying climate variability and change, provide research quality reanalyses for supporting NASA instrument teams and scientific community, provide near-real time forecasts of meteorology,aerosols, and other atmospheric constituents to support NASA airborne campaigns.
- Published
- 2017
47. The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere
- Author
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Thompson, Chelsea R., primary, Wofsy, Steven C., additional, Prather, Michael J., additional, Newman, Paul A., additional, Hanisco, Thomas F., additional, Ryerson, Thomas B., additional, Fahey, David W., additional, Apel, Eric C., additional, Brock, Charles A., additional, Brune, William H., additional, Froyd, Karl, additional, Katich, Joseph M., additional, Nicely, Julie M., additional, Peischl, Jeff, additional, Ray, Eric, additional, Veres, Patrick R., additional, Wang, Siyuan, additional, Allen, Hannah M., additional, Asher, Elizabeth, additional, Bian, Huisheng, additional, Blake, Donald, additional, Bourgeois, Ilann, additional, Budney, John, additional, Bui, T. Paul, additional, Butler, Amy, additional, Campuzano-Jost, Pedro, additional, Chang, Cecilia, additional, Chin, Mian, additional, Commane, Róisín, additional, Correa, Gus, additional, Crounse, John D., additional, Daube, Bruce, additional, Dibb, Jack E., additional, DiGangi, Joshua P., additional, Diskin, Glenn S., additional, Dollner, Maximilian, additional, Elkins, James W., additional, Fiore, Arlene M., additional, Flynn, Clare M., additional, Guo, Hao, additional, Hall, Samuel R., additional, Hannun, Reem A., additional, Hills, Alan, additional, Hintsa, Eric J., additional, Hodzic, Alma, additional, Hornbrook, Rebecca S., additional, Huey, L. Greg, additional, Jimenez, Jose L., additional, Keeling, Ralph F., additional, Kim, Michelle J., additional, Kupc, Agnieszka, additional, Lacey, Forrest, additional, Lait, Leslie R., additional, Lamarque, Jean-Francois, additional, Liu, Junhua, additional, McKain, Kathryn, additional, Meinardi, Simone, additional, Miller, David O., additional, Montzka, Stephen A., additional, Moore, Fred L., additional, Morgan, Eric J., additional, Murphy, Daniel M., additional, Murray, Lee T., additional, Nault, Benjamin A., additional, Neuman, J. Andrew, additional, Nguyen, Louis, additional, Gonzalez, Yenny, additional, Rollins, Andrew, additional, Rosenlof, Karen, additional, Sargent, Maryann, additional, Schill, Gregory, additional, Schwarz, Joshua P., additional, Clair, Jason M. St., additional, Steenrod, Stephen D., additional, Stephens, Britton B., additional, Strahan, Susan E., additional, Strode, Sarah A., additional, Sweeney, Colm, additional, Thames, Alexander B., additional, Ullmann, Kirk, additional, Wagner, Nicholas, additional, Weber, Rodney, additional, Weinzierl, Bernadett, additional, Wennberg, Paul O., additional, Williamson, Christina J., additional, Wolfe, Glenn M., additional, and Zeng, Linghan, additional
- Published
- 2022
- Full Text
- View/download PDF
48. Supplementary material to "Satellite-based evaluation of AeroCom model bias in biomass burning regions"
- Author
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Zhong, Qirui, primary, Schutgens, Nick, additional, van der Werf, Guido, additional, van Noije, Twan, additional, Tsigaridis, Kostas, additional, Bauer, Susanne E., additional, Mielonen, Tero, additional, Kirkevåg, Alf, additional, Seland, Øyvind, additional, Kokkola, Harri, additional, Checa-Garcia, Ramiro, additional, Neubauer, David, additional, Kipling, Zak, additional, Matsui, Hitoshi, additional, Ginoux, Paul, additional, Takemura, Toshihiko, additional, Le Sager, Philippe, additional, Rémy, Samuel, additional, Bian, Huisheng, additional, Chin, Mian, additional, Zhang, Kai, additional, Zhu, Jialei, additional, Tsyro, Svetlana G., additional, Curci, Gabriele, additional, Protonotariou, Anna, additional, Johnson, Ben, additional, Penner, Joyce E., additional, Bellouin, Nicolas, additional, Skeie, Ragnhild B., additional, and Myhre, Gunnar, additional
- Published
- 2022
- Full Text
- View/download PDF
49. Global and Regional Radiative Forcing from 20 Reductions in BC, OC and SO4 an HTAP2 Multi-Model Study
- Author
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Stjern, Camilla Weum, Samset, Bjorn Hallvard, Myhre, Gunnar, Bian, Huisheng, Chin, Mian, Davila, Yanko, Dentener, Frank, Emmons, Louisa, Flemming, Johannes, Haslerud, Amund Sovde, Henze, Daven, Jonson, Jan Eiof, Kucsera, Tom, Lund, Marianne Tronstad, Schulz, Michael, Sudo, Kengo, Takemura, Toshihiko, and Tilmes, Simone
- Subjects
Geosciences (General) ,Environment Pollution - Abstract
In the Hemispheric Transport of Air Pollution Phase 2 (HTAP2) exercise, a range of global atmospheric general circulation and chemical transport models performed coordinated perturbation experiments with 20% reductions in emissions of anthropogenic aerosols, or aerosol precursors, in a number of source regions. Here, we compare the resulting changes in the atmospheric load and vertically resolved profiles of black carbon (BC), organic aerosols (OA) and sulfate (SO4/ from 10 models that include treatment of aerosols. We use a set of temporally, horizontally and vertically resolved profiles of aerosol forcing efficiency (AFE) to estimate the impact of emission changes in six major source regions on global radiative forcing (RF) pertaining to the direct aerosol effect, finding values between. 51.9 and 210.8mW/sq m/Tg for BC, between -2.4 and -17.9mW/sq m/Tg for OA and between -3.6 and -10.3W/sq m/Tg for SO4. In most cases, the local influence dominates, but results show that mitigations in south and east Asia have substantial impacts on the radiative budget in all investigated receptor regions, especially for BC. In Russia and the Middle East, more than 80 % of the forcing for BC and OA is due to extra-regional emission reductions. Similarly, for North America, BC emissions control in east Asia is found to be more important than domestic mitigations, which is consistent with previous findings. Comparing fully resolved RF calculations to RF estimates based on vertically averaged AFE profiles allows us to quantify the importance of vertical resolution to RF estimates. We find that locally in the source regions, a 20% emission reduction strengthens the radiative forcing associated with SO4 by 25% when including the vertical dimension, as the AFE for SO4 is strongest near the surface. Conversely, the local RF from BC weakens by 37% since BC AFE is low close to the ground. The fraction of BC direct effect forcing attributable to intercontinental transport, on the other hand, is enhanced by one-third when accounting for the vertical aspect, because long-range transport primarily leads to aerosol changes at high altitudes, where the BC AFE is strong. While the surface temperature response may vary with the altitude of aerosol change, the analysis in the present study is not extended to estimates of temperature or precipitation changes.
- Published
- 2016
- Full Text
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50. Role of Surface Wind and Vegetation Cover in Multi-decadal Variations of Dust Emission in the Sahara and Sahel
- Author
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Kim, Dong, Chin, Mian, Remer, Lorraine A, Diehl, Thomas L, Bian, Huisheng, Yu, Hongbin, Brown, Molly E, and Stockwell, William R
- Subjects
Geosciences (General) - Abstract
North Africa, the world's largest dust source, is non-uniform, consisting of a permanently arid region (Sahara), a semi-arid region (Sahel), and a relatively moist vegetated region (Savanna), each with very different rainfall patterns and surface conditions. This study aims to better understand the controlling factors that determine the variation of dust emission in North Africa over a 27-year period from 1982 to 2008, using observational data and model simulations. The results show that the model-derived Saharan dust emission is only correlated with the 10-m winds (W10m) obtained from reanalysis data, but the model-derived Sahel dust emission is correlated with both W10m and the Normalized Difference Vegetation Index (NDVI) that is obtained from satellite. While the Saharan dust accounts for 82 of the continental North Africa dust emission (1340-1570 Tg year(exp -1) in the 27-year average, the Sahel accounts for 17 with a larger seasonal and inter-annual variation (230-380 Tg year(exp -1), contributing about a quarter of the transatlantic dust transported to the northern part of South America. The decreasing dust emission trend over the 27-year period is highly correlated with W10m over the Sahara (R equals 0.92). Over the Sahel, the dust emission is correlated with W10m (R 0.69) but is also anti-correlated with the trend of NDVI (R equals 0.65). W10m is decreasing over both the Sahara and the Sahel between 1982 and 2008, and the trends are correlated (R equals 0.53), suggesting that Saharan Sahelian surface winds are a coupled system, driving the inter-annual variation of dust emission.
- Published
- 2016
- Full Text
- View/download PDF
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