Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing
<p>The Greenland ice sheet contributes increasingly to global sea level rise. Its history during past warm intervals is a valuable reference for future sea level projections. We present ice sheet simulations for the Eemian interglacial period (<span class="inline-formula">∼130 ...
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doaj-869cb7efbe12470bb1fa661ab118cb732020-11-25T00:41:14ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242019-08-01132133214810.5194/tc-13-2133-2019Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcingA. Plach0K. H. Nisancioglu1K. H. Nisancioglu2P. M. Langebroek3A. Born4S. Le clec'h5S. Le clec'h6Department of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, NorwayDepartment of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, NorwayCentre for Earth Evolution and Dynamics, University of Oslo, Oslo, NorwayNORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, NorwayDepartment of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, NorwayLaboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, FranceEarth System Science and Department Geografie, Vrije Universiteit Brussel, Brussels, Belgium<p>The Greenland ice sheet contributes increasingly to global sea level rise. Its history during past warm intervals is a valuable reference for future sea level projections. We present ice sheet simulations for the Eemian interglacial period (<span class="inline-formula">∼130 000</span> to 115 000 years ago), a period with warmer-than-present summer climate over Greenland. The evolution of the Eemian Greenland ice sheet is simulated with a 3-D higher-order ice sheet model, forced with a surface mass balance derived from regional climate simulations. Sensitivity experiments with various surface mass balances, basal friction, and ice flow approximations are discussed. The surface mass balance forcing is identified as the controlling factor setting the minimum in Eemian ice volume, emphasizing the importance of a reliable surface mass balance model. Furthermore, the results indicate that the surface mass balance forcing is more important than the representation of ice flow for simulating the large-scale ice sheet evolution. This implies that modeling of the future contribution of the Greenland ice sheet to sea level rise highly depends on an accurate surface mass balance.</p>https://www.the-cryosphere.net/13/2133/2019/tc-13-2133-2019.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Plach K. H. Nisancioglu K. H. Nisancioglu P. M. Langebroek A. Born S. Le clec'h S. Le clec'h |
spellingShingle |
A. Plach K. H. Nisancioglu K. H. Nisancioglu P. M. Langebroek A. Born S. Le clec'h S. Le clec'h Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing The Cryosphere |
author_facet |
A. Plach K. H. Nisancioglu K. H. Nisancioglu P. M. Langebroek A. Born S. Le clec'h S. Le clec'h |
author_sort |
A. Plach |
title |
Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
title_short |
Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
title_full |
Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
title_fullStr |
Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
title_full_unstemmed |
Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
title_sort |
eemian greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing |
publisher |
Copernicus Publications |
series |
The Cryosphere |
issn |
1994-0416 1994-0424 |
publishDate |
2019-08-01 |
description |
<p>The Greenland ice sheet contributes increasingly to global sea level
rise. Its history during past warm intervals is a valuable reference
for future sea level projections. We present ice sheet simulations for
the Eemian interglacial period (<span class="inline-formula">∼130 000</span> to 115 000 years ago), a period with warmer-than-present summer climate over Greenland. The evolution of the Eemian Greenland ice sheet is simulated with a 3-D higher-order ice sheet model, forced with a surface mass balance derived from regional climate simulations. Sensitivity experiments with various surface mass balances, basal friction, and ice flow approximations are discussed. The surface mass balance forcing is identified as the
controlling factor setting the minimum in Eemian ice volume, emphasizing the importance of a reliable surface mass balance model. Furthermore, the results indicate that the surface mass balance forcing is more important than the representation of ice flow for simulating the large-scale ice sheet evolution. This implies that modeling of the future contribution of the Greenland ice sheet to sea level rise highly depends on an accurate surface mass balance.</p> |
url |
https://www.the-cryosphere.net/13/2133/2019/tc-13-2133-2019.pdf |
work_keys_str_mv |
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