Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic
The performance of the Rossby Centre regional climate model RCA4 is investigated for the Arctic CORDEX (COordinated Regional climate Downscaling EXperiment) region, with an emphasis on its suitability to be coupled to a regional ocean and sea ice model. Large biases in mean sea level pressure (MSLP)...
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ftdoajarticles:oai:doaj.org/article:9dcb6c61547641f482e6ce82baea2003 2023-05-15T14:56:15+02:00 Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic P. Berg R. Döscher T. Koenigk 2013-06-01T00:00:00Z https://doi.org/10.5194/gmd-6-849-2013 https://doaj.org/article/9dcb6c61547641f482e6ce82baea2003 EN eng Copernicus Publications http://www.geosci-model-dev.net/6/849/2013/gmd-6-849-2013.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-6-849-2013 1991-959X 1991-9603 https://doaj.org/article/9dcb6c61547641f482e6ce82baea2003 Geoscientific Model Development, Vol 6, Iss 3, Pp 849-859 (2013) Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/gmd-6-849-2013 2022-12-31T14:59:14Z The performance of the Rossby Centre regional climate model RCA4 is investigated for the Arctic CORDEX (COordinated Regional climate Downscaling EXperiment) region, with an emphasis on its suitability to be coupled to a regional ocean and sea ice model. Large biases in mean sea level pressure (MSLP) are identified, with pronounced too-high pressure centred over the North Pole in summer of over 5 hPa, and too-low pressure in winter of a similar magnitude. These lead to biases in the surface winds, which will potentially lead to strong sea ice biases in a future coupled system. The large-scale circulation is believed to be the major reason for the biases, and an implementation of spectral nudging is applied to remedy the problems by constraining the large-scale components of the driving fields within the interior domain. It is found that the spectral nudging generally corrects for the MSLP and wind biases, while not significantly affecting other variables, such as surface radiative components, two-metre temperature and precipitation. Article in Journal/Newspaper Arctic North Pole Sea ice Directory of Open Access Journals: DOAJ Articles Arctic North Pole Geoscientific Model Development 6 3 849 859 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 P. Berg R. Döscher T. Koenigk Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
topic_facet |
Geology QE1-996.5 |
description |
The performance of the Rossby Centre regional climate model RCA4 is investigated for the Arctic CORDEX (COordinated Regional climate Downscaling EXperiment) region, with an emphasis on its suitability to be coupled to a regional ocean and sea ice model. Large biases in mean sea level pressure (MSLP) are identified, with pronounced too-high pressure centred over the North Pole in summer of over 5 hPa, and too-low pressure in winter of a similar magnitude. These lead to biases in the surface winds, which will potentially lead to strong sea ice biases in a future coupled system. The large-scale circulation is believed to be the major reason for the biases, and an implementation of spectral nudging is applied to remedy the problems by constraining the large-scale components of the driving fields within the interior domain. It is found that the spectral nudging generally corrects for the MSLP and wind biases, while not significantly affecting other variables, such as surface radiative components, two-metre temperature and precipitation. |
format |
Article in Journal/Newspaper |
author |
P. Berg R. Döscher T. Koenigk |
author_facet |
P. Berg R. Döscher T. Koenigk |
author_sort |
P. Berg |
title |
Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
title_short |
Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
title_full |
Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
title_fullStr |
Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
title_full_unstemmed |
Impacts of using spectral nudging on regional climate model RCA4 simulations of the Arctic |
title_sort |
impacts of using spectral nudging on regional climate model rca4 simulations of the arctic |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/gmd-6-849-2013 https://doaj.org/article/9dcb6c61547641f482e6ce82baea2003 |
geographic |
Arctic North Pole |
geographic_facet |
Arctic North Pole |
genre |
Arctic North Pole Sea ice |
genre_facet |
Arctic North Pole Sea ice |
op_source |
Geoscientific Model Development, Vol 6, Iss 3, Pp 849-859 (2013) |
op_relation |
http://www.geosci-model-dev.net/6/849/2013/gmd-6-849-2013.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-6-849-2013 1991-959X 1991-9603 https://doaj.org/article/9dcb6c61547641f482e6ce82baea2003 |
op_doi |
https://doi.org/10.5194/gmd-6-849-2013 |
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Geoscientific Model Development |
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6 |
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3 |
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849 |
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859 |
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