The Open UniversitySkip to content
 

Greenland ice sheet surface mass balance: evaluating simulations and making projections with regional climate models

Rae, J. G. L.; Aðalgeirsdóttir, G.; Edwards, T.L.; Fettweis, X.; Gregory, J. M.; Hewitt, H. T.; Lowe, J. A.; Lucas-Picher, P.; Mottram, R. H.; Payne, A. J.; Ridley, J. K.; Shannon, S. R.; van de Berg, W. J.; van de Wal, R. S. W. and van den Broeke, M. R. (2012). Greenland ice sheet surface mass balance: evaluating simulations and making projections with regional climate models. The Cryosphere, 6 pp. 1275–1294.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (17MB) | Preview
DOI (Digital Object Identifier) Link: https://doi.org/10.5194/tc-6-1275-2012
Google Scholar: Look up in Google Scholar

Abstract

Four high-resolution regional climate models (RCMs) have been set up for the area of Greenland, with the aim of providing future projections of Greenland ice sheet surface mass balance (SMB), and its contribution to sea level rise, with greater accuracy than is possible from coarser-resolution general circulation models (GCMs). This is the first time an intercomparison has been carried out of RCM results for Greenland climate and SMB. Output from RCM simulations for the recent past with the four RCMs is evaluated against available observations. The evaluation highlights the importance of using a detailed snow physics scheme, especially regarding the representations of albedo and meltwater refreezing. Simulations with three of the RCMs for the 21st century using SRES scenario A1B from two GCMs produce trends of between −5.5 and −1.1 Gt yr−2 in SMB (equivalent to +0.015 and +0.003 mm sea level equivalent yr−2), with trends of smaller magnitude for scenario E1, in which emissions are mitigated. Results from one of the RCMs whose present-day simulation is most realistic indicate that an annual mean near-surface air temperature increase over Greenland of ~ 2°C would be required for the mass loss to increase such that it exceeds accumulation, thereby causing the SMB to become negative, which has been suggested as a threshold beyond which the ice sheet would eventually be eliminated.

Item Type: Journal Item
Copyright Holders: 2012 The Authors
ISSN: 1994-0424
Project Funding Details:
Funded Project NameProject IDFunding Body
ice2sea programme226375European Union FP7
Met Office Hadley Centre Climate ProgrammeGA01101DECC/Defra Met Office
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 48984
Depositing User: Tamsin Edwards
Date Deposited: 23 Mar 2017 11:17
Last Modified: 14 Jun 2020 18:53
URI: http://oro.open.ac.uk/id/eprint/48984
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU