Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet
With the aim of evaluating the added value of a regional climate model in downscaled future projections over the Greenland Ice Sheet, we have compared the surface fields (snowfall and summer near-surface temperature) coming from the “best” CMIP5 and CMIP6 global models (GCMs) with these fields simul...
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ftorbi:oai:orbi.ulg.ac.be:2268/227667 2024-04-21T08:03:17+00:00 Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet Fettweis, Xavier Delhasse, Alison Agosta, Cécile Amory, Charles Lang, Charlotte Kittel, Christoph 2018-06-22 https://orbi.uliege.be/handle/2268/227667 https://orbi.uliege.be/bitstream/2268/227667/1/fettweis_polar2018.pdf en eng http://www.professionalabstracts.com/POLAR2018/iPlanner/#/grid/1529712000 https://orbi.uliege.be/handle/2268/227667 info:hdl:2268/227667 https://orbi.uliege.be/bitstream/2268/227667/1/fettweis_polar2018.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Polar 2018, Switzerland [CH], from 16-06-2018 to 22-06-2018 Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper 2018 ftorbi 2024-03-27T14:50:04Z With the aim of evaluating the added value of a regional climate model in downscaled future projections over the Greenland Ice Sheet, we have compared the surface fields (snowfall and summer near-surface temperature) coming from the “best” CMIP5 and CMIP6 global models (GCMs) with these fields simulated by the MAR model forced by the same GCMs. These "best" GCMS were selected according to their ability to simulate the summer temperature at 700 hPa and the general circulation at 500 hPa over Greenland with respect to ERA-Interim over 1980-1999. However, despite their ability to correctly represent the free atmosphere, the selected GCMs present significant biases at the surface of the ice sheet. The comparison shows that MAR is however able to strongly reduce these GCM surface biases. We then forced the lateral boundaries of MAR with ERA-Interim to which we applied temperature corrections of +1°C and +2°C. The outputs were compared to MAR forced by GCM future projections corresponding to a climate about 1 and 2°C warmer than the current climate. The results of the different GCM-forced runs and sensitivity experiments are very similar to each other as the GCMs do not project general circulation changes. Moreover, the sensitivity experiments forced by modified ERA-Interim reveal that the projected SMB decrease is exponentially amplified if the increased occurrence of blocking events over Greenland in summer that has been observed since the 2000´s continues in the future. Conference Object Greenland Ice Sheet University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Fettweis, Xavier Delhasse, Alison Agosta, Cécile Amory, Charles Lang, Charlotte Kittel, Christoph Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
With the aim of evaluating the added value of a regional climate model in downscaled future projections over the Greenland Ice Sheet, we have compared the surface fields (snowfall and summer near-surface temperature) coming from the “best” CMIP5 and CMIP6 global models (GCMs) with these fields simulated by the MAR model forced by the same GCMs. These "best" GCMS were selected according to their ability to simulate the summer temperature at 700 hPa and the general circulation at 500 hPa over Greenland with respect to ERA-Interim over 1980-1999. However, despite their ability to correctly represent the free atmosphere, the selected GCMs present significant biases at the surface of the ice sheet. The comparison shows that MAR is however able to strongly reduce these GCM surface biases. We then forced the lateral boundaries of MAR with ERA-Interim to which we applied temperature corrections of +1°C and +2°C. The outputs were compared to MAR forced by GCM future projections corresponding to a climate about 1 and 2°C warmer than the current climate. The results of the different GCM-forced runs and sensitivity experiments are very similar to each other as the GCMs do not project general circulation changes. Moreover, the sensitivity experiments forced by modified ERA-Interim reveal that the projected SMB decrease is exponentially amplified if the increased occurrence of blocking events over Greenland in summer that has been observed since the 2000´s continues in the future. |
format |
Conference Object |
author |
Fettweis, Xavier Delhasse, Alison Agosta, Cécile Amory, Charles Lang, Charlotte Kittel, Christoph |
author_facet |
Fettweis, Xavier Delhasse, Alison Agosta, Cécile Amory, Charles Lang, Charlotte Kittel, Christoph |
author_sort |
Fettweis, Xavier |
title |
Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
title_short |
Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
title_full |
Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
title_fullStr |
Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
title_full_unstemmed |
Interest of a Regional Climate Model for doing future projections over the Greenland Ice Sheet |
title_sort |
interest of a regional climate model for doing future projections over the greenland ice sheet |
publishDate |
2018 |
url |
https://orbi.uliege.be/handle/2268/227667 https://orbi.uliege.be/bitstream/2268/227667/1/fettweis_polar2018.pdf |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Polar 2018, Switzerland [CH], from 16-06-2018 to 22-06-2018 |
op_relation |
http://www.professionalabstracts.com/POLAR2018/iPlanner/#/grid/1529712000 https://orbi.uliege.be/handle/2268/227667 info:hdl:2268/227667 https://orbi.uliege.be/bitstream/2268/227667/1/fettweis_polar2018.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796943202267168768 |