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26 results on '"Mizielinski, Matthew S."'

2. Corrigendum

Author

Schiemann, Reinhard, Demory, Marie-Estelle, Shaffrey, Len C, Strachan, Jane, Vidale, Pier Luigi, Mizielinski, Matthew S, Roberts, Malcolm J, Matsueda, Mio, Wehner, Michael F, and Jung, Thomas

Subjects
Atmospheric Sciences, Oceanography, Geomatic Engineering, Meteorology & Atmospheric Sciences
Published
2017

3. The resolution sensitivity of Northern Hemisphere blocking in four 25-km atmospheric global circulation models

Author

Schiemann, Reinhard, Demory, Marie-Estelle, Shaffrey, Len C, Strachan, Jane, Vidale, Pier Luigi, Mizielinski, Matthew S, Roberts, Malcolm J, Matsueda, Mio, Wehner, Michael F, and Jung, Thomas

Subjects
Atmospheric Sciences, Oceanography, Geomatic Engineering, Meteorology & Atmospheric Sciences
Abstract

The aim of this study is to investigate if the representation of Northern Hemisphere blocking is sensitive to resolution in current-generation atmospheric global circulation models (AGCMs). An evaluation is conducted of how well atmospheric blocking is represented in four AGCMs whose horizontal resolution is increased from a grid spacing of more than 100 km to about 25 km. It is shown that Euro-Atlantic blocking is simulated overall more credibly at higher resolution (i.e., in better agreement with a 50-yr reference blocking climatology created from the reanalyses ERA-40 and ERA-Interim). The improvement seen with resolution depends on the season and to some extent on the model considered. Euro-Atlantic blocking is simulated more realistically at higher resolution in winter, spring, and autumn, and robustly so across the model ensemble. The improvement in spring is larger than that in winter and autumn. Summer blocking is found to be better simulated at higher resolution by one model only, with little change seen in the other three models. The representation of Pacific blocking is not found to systematically depend on resolution. Despite the improvements seen with resolution, the 25-km models still exhibit large biases in Euro-Atlantic blocking. For example, three of the four 25-km models underestimate winter northern European blocking frequency by about one-third. The resolution sensitivity and biases in the simulated blocking are shown to be in part associated with the mean-state biases in the models' midlatitude circulation.

Published
2017

8. The analysis of large-volume multi-institute climate model output at a Central Analysis Facility (PRIMAVERA Data Management Tool V2.10).

Author

Seddon, Jon, Stephens, Ag, Mizielinski, Matthew S., Vidale, Pier Luigi, and Roberts, Malcolm J.

Subjects
CLIMATE change models, ATMOSPHERIC models, DATA management, COMPUTER performance
Abstract

The PRIMAVERA project aimed to develop a new generation of advanced and well-evaluated high-resolution global climate models. As part of PRIMAVERA, seven different climate models were run in both standard and higher resolution configurations, with common initial conditions and forcings to form a multi-model ensemble. The ensemble simulations were run on high performance computers across Europe and generated approximately 1.6 pebibytes of output. To allow the data from all models to be analysed at this scale, PRIMAVERA scientists were encouraged to bring their analysis to the data. All data was transferred to a Central Analysis Facility (CAF), in this case the JASMIN super-data-cluster, where it was catalogued and details made available to users using the PRIMAVERA Data Management Tool's (DMT's) web interface. Users from across the project were able to query the available data using the DMT and then access it at the CAF. Here we describe how the PRIMAVERA project used the CAF's facilities to enable users to analyse this multi-model data set. We believe that PRIMAVERA's experience using a CAF demonstrates how similar, multi institute, big-data projects can efficiently share, organise and analyse large volumes of data. [ABSTRACT FROM AUTHOR]

Published
2023
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10. Deliverable D9.6 Review of DMP and lessons learnt for future projects

Author

Seddon, Jon, Mizielinski, Matthew S., Roberts, Malcolm, Stephens, Ag, Hegewald, Jan, Semmler, Tido, Bretonnière, Pierre-Antoine, Caron, Louis-Philippe, D'Anca, Alessandro, Fiore, Sandro, Moine, Marie-Pierre, Roberts, Chris, Senan, Retish, and Fladrich, Uwe

Abstract

Review of outcomes of the DMP and document lessons for future EU and international big data projects.

Published
2020
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11. Historical Simulations With HadGEM3‐GC3.1 for CMIP6

Author

Andrews, Martin B., primary, Ridley, Jeff K., additional, Wood, Richard A., additional, Andrews, Timothy, additional, Blockley, Edward W., additional, Booth, Ben, additional, Burke, Eleanor, additional, Dittus, Andrea J., additional, Florek, Piotr, additional, Gray, Lesley J., additional, Haddad, Stephen, additional, Hardiman, Steven C., additional, Hermanson, Leon, additional, Hodson, Dan, additional, Hogan, Emma, additional, Jones, Gareth S., additional, Knight, Jeff R., additional, Kuhlbrodt, Till, additional, Misios, Stergios, additional, Mizielinski, Matthew S., additional, Ringer, Mark A., additional, Robson, Jon, additional, and Sutton, Rowan T., additional

Published
2020
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12. Implementation of U.K. Earth System Models for CMIP6

Author

Sellar, Alistair A., primary, Walton, Jeremy, additional, Jones, Colin G., additional, Wood, Richard, additional, Abraham, Nathan Luke, additional, Andrejczuk, Miroslaw, additional, Andrews, Martin B., additional, Andrews, Timothy, additional, Archibald, Alex T., additional, de Mora, Lee, additional, Dyson, Harold, additional, Elkington, Mark, additional, Ellis, Richard, additional, Florek, Piotr, additional, Good, Peter, additional, Gohar, Laila, additional, Haddad, Stephen, additional, Hardiman, Steven C., additional, Hogan, Emma, additional, Iwi, Alan, additional, Jones, Christopher D., additional, Johnson, Ben, additional, Kelley, Douglas I., additional, Kettleborough, Jamie, additional, Knight, Jeff R., additional, Köhler, Marcus O., additional, Kuhlbrodt, Till, additional, Liddicoat, Spencer, additional, Linova‐Pavlova, Irina, additional, Mizielinski, Matthew S., additional, Morgenstern, Olaf, additional, Mulcahy, Jane, additional, Neininger, Erica, additional, O'Connor, Fiona M., additional, Petrie, Ruth, additional, Ridley, Jeff, additional, Rioual, Jean‐Christophe, additional, Roberts, Malcolm, additional, Robertson, Eddy, additional, Rumbold, Steven, additional, Seddon, Jon, additional, Shepherd, Harry, additional, Shim, Sungbo, additional, Stephens, Ag, additional, Teixiera, Joao C., additional, Tang, Yongming, additional, Williams, Jonny, additional, Wiltshire, Andy, additional, and Griffiths, Paul T., additional

Published
2020
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13. The CMIP6 Data Request (DREQ, version 01.00.31)

Author

Juckes, Martin, primary, Taylor, Karl E., additional, Durack, Paul J., additional, Lawrence, Bryan, additional, Mizielinski, Matthew S., additional, Pamment, Alison, additional, Peterschmitt, Jean-Yves, additional, Rixen, Michel, additional, and Sénési, Stéphane, additional

Published
2020
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17. PRIMAVERA Deliverable D9.1 Data Management Plan

Author

Mizielinski, Matthew S., Stephens, Ag, van der Linden, Paul, Bretonniere, Pierre Antoine, Fiore, Sandro, von Hardenberg, Jost, Kolax, Michael, Lohmann, Katja, Moine, Marie-Pierre, Le Sager, Philippe, Semmler, Tido, and Senan, Retish

Abstract

Specification of the Inputs and Outputs, data format standards, means of exploitation and data curation policy. This specification will be based on CMIP5 standard diagnostic lists and will include details of file-naming and metadata conventions.

Published
2016
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18. Milestone 22 HPC Plan for Stream 1

Author

Mizielinski, Matthew S., Stephens, Ag, van der Linden, Paul, Bretonniere, Pierre Antoine, Fiore, Sandro, von Hardenberg, Jost, Kolax, Michael, Lohmann, Katja, Moine, Marie-Pierre, Le Sager, Philippe, Semmler, Tido, and Senan, Retish

Abstract

Confirm that all centres have required HPC resources and models that can perform the core integrations

Published
2016
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19. The resolution sensitivity of the South Asian monsoon and Indo-Pacific in a global 0.35◦ AGCM

Author

Johnson, Stephanie J., Levine, Richard C., Turner, Andrew G., Martin, Gill M., Woolnough, Steven J., Schiemann, Reinhard, Mizielinski, Matthew S., Roberts, Malcolm J., Vidale, Pier Luigi, Demory, Marie-Estelle, and Strachan, Jane

Subjects
Atmospheric Science
Abstract

The South Asian monsoon is one of the most significant manifestations of the seasonal cycle. It directly impacts nearly one third of the world’s population and also has substantial global influence. Using 27-year integrations of a high-resolution atmospheric general circulation model (Met Office Unified Model), we study changes in South Asian monsoon precipitation and circulation when horizontal resolution is increased from approximately 200 to 40 km at the equator (N96 to N512, 1.9 to 0.35◦). The high resolution, integration length and ensemble size of the dataset make this the most extensive dataset used to evaluate the resolution sensitivity of the South Asian monsoon to date. We find a consistent pattern of JJAS precipitation and circulation changes as resolution increases, which include a slight increase in precipitation over peninsular India, changes in Indian and Indochinese orographic rain bands, increasing wind speeds in the Somali Jet, increasing precipitation over the Maritime Continent islands and decreasing precipitation over the northern Maritime Continent seas. To diagnose which resolution related processes cause these changes we compare them to published sensitivity experiments that change regional orography and coastlines. Our analysis indicates that improved resolution of the East African Highlands results in the improved representation of the Somali Jet and further suggests that improved resolution of orography over Indochina and the Maritime Continent results in more precipitation over the Maritime Continent islands at the expense of reduced precipitation further north. We also evaluate the resolution sensitivity of monsoon depressions and lows, which contribute more precipitation over northeast India at higher resolution. We conclude that while increasing resolution at these scales does not solve the many monsoon biases that exist in GCMs, it has a number of small, beneficial impacts.

Published
2016

20. High Resolution Model Intercomparison Project (HighResMIP v1.0) for CMIP6

Author

Haarsma, Reindert J., primary, Roberts, Malcolm J., additional, Vidale, Pier Luigi, additional, Senior, Catherine A., additional, Bellucci, Alessio, additional, Bao, Qing, additional, Chang, Ping, additional, Corti, Susanna, additional, Fučkar, Neven S., additional, Guemas, Virginie, additional, von Hardenberg, Jost, additional, Hazeleger, Wilco, additional, Kodama, Chihiro, additional, Koenigk, Torben, additional, Leung, L. Ruby, additional, Lu, Jian, additional, Luo, Jing-Jia, additional, Mao, Jiafu, additional, Mizielinski, Matthew S., additional, Mizuta, Ryo, additional, Nobre, Paulo, additional, Satoh, Masaki, additional, Scoccimarro, Enrico, additional, Semmler, Tido, additional, Small, Justin, additional, and von Storch, Jin-Song, additional

Published
2016
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21. The impact of resolving the Rossby radius at mid-latitudes in the ocean: results from a high-resolution version of the Met Office GC2 coupled model

Author

Hewitt, Helene T., primary, Roberts, Malcolm J., additional, Hyder, Pat, additional, Graham, Tim, additional, Rae, Jamie, additional, Belcher, Stephen E., additional, Bourdallé-Badie, Romain, additional, Copsey, Dan, additional, Coward, Andrew, additional, Guiavarch, Catherine, additional, Harris, Chris, additional, Hill, Richard, additional, Hirschi, Joël J.-M., additional, Madec, Gurvan, additional, Mizielinski, Matthew S., additional, Neininger, Erica, additional, New, Adrian L., additional, Rioual, Jean-Christophe, additional, Sinha, Bablu, additional, Storkey, David, additional, Shelly, Ann, additional, Thorpe, Livia, additional, and Wood, Richard A., additional

Published
2016
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23. Mean and extreme precipitation over European river basins better simulated in a 25km AGCM.

Author

Schiemann, Reinhard, Vidale, Pier Luigi, Shaffrey, Len C., Johnson, Stephanie J., Roberts, Malcolm J., Demory, Marie-Estelle, Mizielinski, Matthew S., and Strachan, Jane

Subjects
PRECIPITATION (Chemistry), WATERSHEDS, MOUNTAINS, STANDARD deviations, COASTAL mapping
Abstract

Limited spatial resolution is one of the factors that may hamper applications of global climate models (GCMs), in particular over Europe with its complex coastline and orography. In this study, the representation of European mean and extreme precipitation is evaluated in simulations with an atmospheric GCM (AGCM) at different resolutions between about 135 and 25 km grid spacing in the mid-latitudes. The continent-wide root-mean-square error in mean precipitation in the 25 km model is about 25 % smaller than in the 135 km model in winter. Clear improvements are also seen in autumn and spring, whereas the model's sensitivity to resolution is very small in summer. Extreme precipitation is evaluated by estimating generalised extreme value distributions (GEVs) of daily precipitation aggregated over river basins whose surface area is greater than 50 000 km². GEV location and scale parameters are measures of the typical magnitude and of the interannual variability of extremes, respectively. Median model biases in both these parameters are around 10% in summer and around 20% in the other seasons. For some river basins, however, these biases can be much larger and take values between 50% and 100 %. Extreme precipitation is better simulated in the 25 km model, especially during autumn when the median GEV parameter biases are more than halved, and in the North European Plains, from the Loire in the west to the Vistula in the east. A sensitivity experiment is conducted showing that these resolution sensitivities in both mean and extreme precipitation are in many areas primarily due to the increase in resolution of the model orography. The findings of this study illustrate the improved capability of a global high-resolution model in simulating European mean and extreme precipitation. [ABSTRACT FROM AUTHOR]

Published
2018
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24. The resolution sensitivity of the South Asian monsoon and Indo-Pacific in a global 0.35° AGCM

Author

Johnson, Stephanie J., primary, Levine, Richard C., additional, Turner, Andrew G., additional, Martin, Gill M., additional, Woolnough, Steven J., additional, Schiemann, Reinhard, additional, Mizielinski, Matthew S., additional, Roberts, Malcolm J., additional, Vidale, Pier Luigi, additional, Demory, Marie-Estelle, additional, and Strachan, Jane, additional

Published
2015
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