A numerical study using the Canadian Regional Climate Model for the PIDCAP period
Simulations of summertime conditions over the BALTEX region using the Canadian Regional Climate Model (CRCM) are compared with observations for the PIDCAP period. A systematic cold bias of the surface temperature was found in a reference simulation made with a version of the CRCM which uses the phys...
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2024
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Online Access: | http://hdl.handle.net/10138/578149 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/578149 2024-09-09T19:34:21+00:00 A numerical study using the Canadian Regional Climate Model for the PIDCAP period Lorant, V. McFarlane, N. Laprise, R. 2024-06-27T13:44:43Z 203-210 application/pdf http://hdl.handle.net/10138/578149 eng eng Boreal Environment Research Publishing Board Boreal Environment Research 1239-6095 1797-2469 3 7 http://hdl.handle.net/10138/578149 Suomen ympäristökeskus CC BY 4.0 openAccess Artikkeli lehdessä 2024 ftunivhelsihelda 2024-08-21T23:48:04Z Simulations of summertime conditions over the BALTEX region using the Canadian Regional Climate Model (CRCM) are compared with observations for the PIDCAP period. A systematic cold bias of the surface temperature was found in a reference simulation made with a version of the CRCM which uses the physical processes package of the third generation global climate model of the Canadian Centre for Climate Modeling and Analysis. This cold bias is found to be due to excessive cloud near the surface. Revision of the cloud scheme, which was originally designed for use in conjunction with relatively coarse resolution of the AGCM, results in a reduction of the cloud cover, improved net radiative flux at the surface and substantial reduction of the cold bias. An associated result is that the lower atmosphere becomes more conditionally unstable which increases the number of convective events. Nevertheless the incidence of convective precipitation events remains unrealistically low. Article in Journal/Newspaper Boreal Environment Research HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
description |
Simulations of summertime conditions over the BALTEX region using the Canadian Regional Climate Model (CRCM) are compared with observations for the PIDCAP period. A systematic cold bias of the surface temperature was found in a reference simulation made with a version of the CRCM which uses the physical processes package of the third generation global climate model of the Canadian Centre for Climate Modeling and Analysis. This cold bias is found to be due to excessive cloud near the surface. Revision of the cloud scheme, which was originally designed for use in conjunction with relatively coarse resolution of the AGCM, results in a reduction of the cloud cover, improved net radiative flux at the surface and substantial reduction of the cold bias. An associated result is that the lower atmosphere becomes more conditionally unstable which increases the number of convective events. Nevertheless the incidence of convective precipitation events remains unrealistically low. |
format |
Article in Journal/Newspaper |
author |
Lorant, V. McFarlane, N. Laprise, R. |
spellingShingle |
Lorant, V. McFarlane, N. Laprise, R. A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
author_facet |
Lorant, V. McFarlane, N. Laprise, R. |
author_sort |
Lorant, V. |
title |
A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
title_short |
A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
title_full |
A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
title_fullStr |
A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
title_full_unstemmed |
A numerical study using the Canadian Regional Climate Model for the PIDCAP period |
title_sort |
numerical study using the canadian regional climate model for the pidcap period |
publisher |
Boreal Environment Research Publishing Board |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/578149 |
genre |
Boreal Environment Research |
genre_facet |
Boreal Environment Research |
op_relation |
Boreal Environment Research 1239-6095 1797-2469 3 7 http://hdl.handle.net/10138/578149 Suomen ympäristökeskus |
op_rights |
CC BY 4.0 openAccess |
_version_ |
1809903845717835776 |