Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity
The near-surface climate, including the atmosphere, ocean, sea ice, and land state and fluxes, in the initial version of the Regional Arctic System Model (RASM) are presented. The sensitivity of the RASM near-surface climate to changes in atmosphere, ocean, and sea ice parameters and physics is eval...
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Language: | English |
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Online Access: | https://doi.org/10.1175/JCLI-D-15-0775.1 |
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ftncar:oai:drupal-site.org:articles_21997 2023-09-05T13:16:53+02:00 Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity Cassano, John J. (author) DuVivier, Alice (author) Roberts, Andrew (author) Hughes, Mimi (author) Seefeldt, Mark (author) Brunke, Michael (author) Craig, Anthony (author) Fisel, Brandon (author) Gutowski, William (author) Hamman, Joseph (author) Higgins, Matthew (author) Maslowski, Wieslaw (author) Nijssen, Bart (author) Osinski, Robert (author) Zeng, Xubin (author) 2017-08 https://doi.org/10.1175/JCLI-D-15-0775.1 en eng Journal of Climate--J. Climate--0894-8755--1520-0442 ERA-Interim Project--10.5065/D6CR5RD9 articles:21997 ark:/85065/d7086865 doi:10.1175/JCLI-D-15-0775.1 Copyright 2017 American Meteorological Society. article Text 2017 ftncar https://doi.org/10.1175/JCLI-D-15-0775.1 2023-08-14T18:49:57Z The near-surface climate, including the atmosphere, ocean, sea ice, and land state and fluxes, in the initial version of the Regional Arctic System Model (RASM) are presented. The sensitivity of the RASM near-surface climate to changes in atmosphere, ocean, and sea ice parameters and physics is evaluated in four simulations. The near-surface atmospheric circulation is well simulated in all four RASM simulations but biases in surface temperature are caused by biases in downward surface radiative fluxes. Errors in radiative fluxes are due to biases in simulated clouds with different versions of RASM simulating either too much or too little cloud radiative impact over open ocean regions and all versions simulating too little cloud radiative impact over land areas. Cold surface temperature biases in the central Arctic in winter are likely due to too few or too radiatively thin clouds. The precipitation simulated by RASM is sensitive to changes in evaporation that were linked to sea surface temperature biases. Future work will explore changes in model microphysics aimed at minimizing the cloud and radiation biases identified in this work. Article in Journal/Newspaper Arctic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Journal of Climate 30 15 5729 5753 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The near-surface climate, including the atmosphere, ocean, sea ice, and land state and fluxes, in the initial version of the Regional Arctic System Model (RASM) are presented. The sensitivity of the RASM near-surface climate to changes in atmosphere, ocean, and sea ice parameters and physics is evaluated in four simulations. The near-surface atmospheric circulation is well simulated in all four RASM simulations but biases in surface temperature are caused by biases in downward surface radiative fluxes. Errors in radiative fluxes are due to biases in simulated clouds with different versions of RASM simulating either too much or too little cloud radiative impact over open ocean regions and all versions simulating too little cloud radiative impact over land areas. Cold surface temperature biases in the central Arctic in winter are likely due to too few or too radiatively thin clouds. The precipitation simulated by RASM is sensitive to changes in evaporation that were linked to sea surface temperature biases. Future work will explore changes in model microphysics aimed at minimizing the cloud and radiation biases identified in this work. |
author2 |
Cassano, John J. (author) DuVivier, Alice (author) Roberts, Andrew (author) Hughes, Mimi (author) Seefeldt, Mark (author) Brunke, Michael (author) Craig, Anthony (author) Fisel, Brandon (author) Gutowski, William (author) Hamman, Joseph (author) Higgins, Matthew (author) Maslowski, Wieslaw (author) Nijssen, Bart (author) Osinski, Robert (author) Zeng, Xubin (author) |
format |
Article in Journal/Newspaper |
title |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
spellingShingle |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
title_short |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
title_full |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
title_fullStr |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
title_full_unstemmed |
Development of the Regional Arctic System Model (RASM): Near-surface atmospheric climate sensitivity |
title_sort |
development of the regional arctic system model (rasm): near-surface atmospheric climate sensitivity |
publishDate |
2017 |
url |
https://doi.org/10.1175/JCLI-D-15-0775.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Journal of Climate--J. Climate--0894-8755--1520-0442 ERA-Interim Project--10.5065/D6CR5RD9 articles:21997 ark:/85065/d7086865 doi:10.1175/JCLI-D-15-0775.1 |
op_rights |
Copyright 2017 American Meteorological Society. |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0775.1 |
container_title |
Journal of Climate |
container_volume |
30 |
container_issue |
15 |
container_start_page |
5729 |
op_container_end_page |
5753 |
_version_ |
1776198301725491200 |