Greenland ice sheet projections from IPCC AR4 global models
The atmosphere-ocean general circulation models (AOGCMs) used for the IPCC 4th Assessment Report (IPCC AR4) are evaluated for the Greenland ice sheet (GrIS) current climate modelling. The most efficient AOGCMs are chosen by comparison between the 1970-1999 outputs of the Climate of the twentieth Cen...
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ftorbi:oai:orbi.ulg.ac.be:2268/59543 2024-04-21T08:03:23+00:00 Greenland ice sheet projections from IPCC AR4 global models Franco, Bruno Fettweis, Xavier Erpicum, Michel Nicolay, Samuel Laboratoire de Climatologie et Topoclimatologie 2009-04 https://orbi.uliege.be/handle/2268/59543 en eng https://orbi.uliege.be/handle/2268/59543 info:hdl:2268/59543 European Geosciences Union General Assembly 2009, Vienna, Austria [AT], avril 2009 Greenland ice sheet SRES scenarios IPCC AR4 global models Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2009 ftorbi 2024-03-27T14:43:45Z The atmosphere-ocean general circulation models (AOGCMs) used for the IPCC 4th Assessment Report (IPCC AR4) are evaluated for the Greenland ice sheet (GrIS) current climate modelling. The most efficient AOGCMs are chosen by comparison between the 1970-1999 outputs of the Climate of the twentieth Century experiment (20C3M) and reanalyses (ECMWF, NCEP/NCAR). This comparison reveals that surface parameters such as temperature and precipitation are highly correlated to the atmospheric circulation (500 hPa geopotential height) and its interannual variability (North Atlantic oscillation). The outputs of the three most efficient AOGCMs are then used to assess the changes planned by three IPCC greenhouse gas emissions scenarios (SRES) for the 2070-2099 period. Future atmospheric circulation changes should dampen the west-to-east circulation (zonal flow) and should enhance the Meridional Overturning Circulation (MOC). As a consequence, this provides more heat and moisture to the GrIS, increasing temperature on the whole ice sheet and precipitation on the north-eastern region. It is also shown that the GrIS surface mass balance (SMB) anomalies from the SRES A1B scenario are about -300 km³/yr with respect to the 1970-1999 period, leading to 5 cm of global sea-level rise (SLR) for the end of the 21st century. This work helps to choose the boundaries conditions for AOGCMs downscaled future projections. Conference Object Greenland Ice Sheet North Atlantic North Atlantic oscillation 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 |
Greenland ice sheet SRES scenarios IPCC AR4 global models Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Greenland ice sheet SRES scenarios IPCC AR4 global models Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Franco, Bruno Fettweis, Xavier Erpicum, Michel Nicolay, Samuel Greenland ice sheet projections from IPCC AR4 global models |
topic_facet |
Greenland ice sheet SRES scenarios IPCC AR4 global models Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
The atmosphere-ocean general circulation models (AOGCMs) used for the IPCC 4th Assessment Report (IPCC AR4) are evaluated for the Greenland ice sheet (GrIS) current climate modelling. The most efficient AOGCMs are chosen by comparison between the 1970-1999 outputs of the Climate of the twentieth Century experiment (20C3M) and reanalyses (ECMWF, NCEP/NCAR). This comparison reveals that surface parameters such as temperature and precipitation are highly correlated to the atmospheric circulation (500 hPa geopotential height) and its interannual variability (North Atlantic oscillation). The outputs of the three most efficient AOGCMs are then used to assess the changes planned by three IPCC greenhouse gas emissions scenarios (SRES) for the 2070-2099 period. Future atmospheric circulation changes should dampen the west-to-east circulation (zonal flow) and should enhance the Meridional Overturning Circulation (MOC). As a consequence, this provides more heat and moisture to the GrIS, increasing temperature on the whole ice sheet and precipitation on the north-eastern region. It is also shown that the GrIS surface mass balance (SMB) anomalies from the SRES A1B scenario are about -300 km³/yr with respect to the 1970-1999 period, leading to 5 cm of global sea-level rise (SLR) for the end of the 21st century. This work helps to choose the boundaries conditions for AOGCMs downscaled future projections. |
author2 |
Laboratoire de Climatologie et Topoclimatologie |
format |
Conference Object |
author |
Franco, Bruno Fettweis, Xavier Erpicum, Michel Nicolay, Samuel |
author_facet |
Franco, Bruno Fettweis, Xavier Erpicum, Michel Nicolay, Samuel |
author_sort |
Franco, Bruno |
title |
Greenland ice sheet projections from IPCC AR4 global models |
title_short |
Greenland ice sheet projections from IPCC AR4 global models |
title_full |
Greenland ice sheet projections from IPCC AR4 global models |
title_fullStr |
Greenland ice sheet projections from IPCC AR4 global models |
title_full_unstemmed |
Greenland ice sheet projections from IPCC AR4 global models |
title_sort |
greenland ice sheet projections from ipcc ar4 global models |
publishDate |
2009 |
url |
https://orbi.uliege.be/handle/2268/59543 |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation |
op_source |
European Geosciences Union General Assembly 2009, Vienna, Austria [AT], avril 2009 |
op_relation |
https://orbi.uliege.be/handle/2268/59543 info:hdl:2268/59543 |
_version_ |
1796943251970719744 |