Skip to main content
Article thumbnail
Location of Repository

Large sensitivity of a Greenland ice sheet model to atmospheric forcing fields

By A. Quiquet, H. J. Punge, C. Ritz, X. Fettweis, M. Kageyama, G. Krinner, D. Salas y Mélia and J. Sjolte

Abstract

The prediction of future climate and ice sheet evolution requires coupling of ice sheet and climate models. Before proceeding to a coupled setup, we propose to analyze the impact of model simulated climate on an ice sheet. Here, we undertake this exercise for a set of regional and global climate models. Modelled near surface air temperature and precipitation are provided as upper boundary condition to the GRISLI (GRenoble Ice Shelf and Land Ice model) hybrid ice sheet model (ISM) in its Greenland configuration. <br><br> After 20 kyr of simulation, the resulting ice sheets highlight the differences between the climate models. While modelled ice sheet sizes are generally comparable to the observed ones, there are considerable deviations among the ice sheets on regional scales. These can be explained by difficulties in modelling local temperature and precipitation near the coast. This is especially true in the case of global models. But the deviations of each climate model are also due to the differences in the atmospheric general circulation. In the context of coupling ice sheet and climate models, we conclude that appropriate downscaling methods will be needed and systematic corrections of the climatic variables at the interface may be required in some cases to obtain realistic results for the Greenland ice sheet (GIS)

Topics: LCC:Environmental sciences, LCC:GE1-350, LCC:Geography. Anthropology. Recreation, LCC:G, DOAJ:Environmental Sciences, DOAJ:Earth and Environmental Sciences, LCC:Meteorology. Climatology, LCC:QC851-999, LCC:Physics, LCC:QC1-999, LCC:Science, LCC:Q, DOAJ:Meteorology and Climatology, DOAJ:Earth and Environmental Sciences
Publisher: Copernicus GmbH
Year: 2012
DOI identifier: 10.5194/tcd-6-1037-2012
OAI identifier: oai:doaj.org/article:9050a494f9e74376a3b0990c9b99fd66
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://doaj.org/search?source=... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.