Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model
The Greenland Ice Sheet (GrIS) is losing mass in an accelerated fashion, which is for ~60% dominated by an increase in surface melting. Clouds exhibit an important control on the GrIS surface energy balance and surface melt. Therefore, to better simulate present and future GrIS climate, it is essent...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/409113 2023-11-12T04:17:52+01:00 Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model Lenaerts, Jan T.M. Gettelman, Andrew Van Tricht, Kristof van Kampenhout, Leo Miller, Nathaniel B. Sub Dynamics Meteorology Marine and Atmospheric Research 2020-04-16 application/pdf https://dspace.library.uu.nl/handle/1874/409113 en eng 2169-897X https://dspace.library.uu.nl/handle/1874/409113 info:eu-repo/semantics/OpenAccess Geophysics Forestry Oceanography Aquatic Science Ecology Water Science and Technology Soil Science Geochemistry and Petrology Earth-Surface Processes Atmospheric Science Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Palaeontology Article 2020 ftunivutrecht 2023-11-01T23:24:22Z The Greenland Ice Sheet (GrIS) is losing mass in an accelerated fashion, which is for ~60% dominated by an increase in surface melting. Clouds exhibit an important control on the GrIS surface energy balance and surface melt. Therefore, to better simulate present and future GrIS climate, it is essential to represent clouds correctly in climate models. Here we use ground (at Summit Station) and satellite remote sensing (from CloudSat-CALIPSO) observations to evaluate GrIS cloud characteristics in several versions of the Community Atmosphere Model (CAM) over the period 2007–2012. Cloud cover, phase, water path, and radiative effects over the GrIS vary widely across the atmosphere models. Thanks to the inclusion of new cloud physical parameterizations, that is, ice nucleation and prognostic precipitation, in the most recent CAM version (CAM6), this model, amongst the various CAM versions, is best able to represent GrIS clouds, summer temperatures, and surface melting. However, CAM6 shows excessive rainfall over the ice sheet, which is an important outstanding model bias. Our study demonstrates the importance of simulating realistic cloud properties to improve climate model simulations of GrIS climate and climate change. Article in Journal/Newspaper Greenland Ice Sheet Utrecht University Repository Greenland |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Geophysics Forestry Oceanography Aquatic Science Ecology Water Science and Technology Soil Science Geochemistry and Petrology Earth-Surface Processes Atmospheric Science Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Palaeontology |
spellingShingle |
Geophysics Forestry Oceanography Aquatic Science Ecology Water Science and Technology Soil Science Geochemistry and Petrology Earth-Surface Processes Atmospheric Science Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Palaeontology Lenaerts, Jan T.M. Gettelman, Andrew Van Tricht, Kristof van Kampenhout, Leo Miller, Nathaniel B. Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
topic_facet |
Geophysics Forestry Oceanography Aquatic Science Ecology Water Science and Technology Soil Science Geochemistry and Petrology Earth-Surface Processes Atmospheric Science Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Palaeontology |
description |
The Greenland Ice Sheet (GrIS) is losing mass in an accelerated fashion, which is for ~60% dominated by an increase in surface melting. Clouds exhibit an important control on the GrIS surface energy balance and surface melt. Therefore, to better simulate present and future GrIS climate, it is essential to represent clouds correctly in climate models. Here we use ground (at Summit Station) and satellite remote sensing (from CloudSat-CALIPSO) observations to evaluate GrIS cloud characteristics in several versions of the Community Atmosphere Model (CAM) over the period 2007–2012. Cloud cover, phase, water path, and radiative effects over the GrIS vary widely across the atmosphere models. Thanks to the inclusion of new cloud physical parameterizations, that is, ice nucleation and prognostic precipitation, in the most recent CAM version (CAM6), this model, amongst the various CAM versions, is best able to represent GrIS clouds, summer temperatures, and surface melting. However, CAM6 shows excessive rainfall over the ice sheet, which is an important outstanding model bias. Our study demonstrates the importance of simulating realistic cloud properties to improve climate model simulations of GrIS climate and climate change. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Lenaerts, Jan T.M. Gettelman, Andrew Van Tricht, Kristof van Kampenhout, Leo Miller, Nathaniel B. |
author_facet |
Lenaerts, Jan T.M. Gettelman, Andrew Van Tricht, Kristof van Kampenhout, Leo Miller, Nathaniel B. |
author_sort |
Lenaerts, Jan T.M. |
title |
Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
title_short |
Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
title_full |
Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
title_fullStr |
Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
title_full_unstemmed |
Impact of Cloud Physics on the Greenland Ice Sheet Near-Surface Climate: A Study With the Community Atmosphere Model |
title_sort |
impact of cloud physics on the greenland ice sheet near-surface climate: a study with the community atmosphere model |
publishDate |
2020 |
url |
https://dspace.library.uu.nl/handle/1874/409113 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
2169-897X https://dspace.library.uu.nl/handle/1874/409113 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334629325307904 |