Elimination of the Greenland Ice Sheet in a High CO2 Climate
Projections of future global sea level depend on reliable estimates of changes in the size of polar ice sheets. Calculating this directly from global general circulation models (GCMs) is unreliable because the coarse resolution of 100 km or more is unable to capture narrow ablation zones, and ice dy...
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American Meteorological Society
2005
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ftunivreading:oai:centaur.reading.ac.uk:5148 2024-06-23T07:53:18+00:00 Elimination of the Greenland Ice Sheet in a High CO2 Climate Ridley, J. K. Huybrechts, P. Gregory, J. M. Lowe, J. A. 2005 https://centaur.reading.ac.uk/5148/ unknown American Meteorological Society Ridley, J. K., Huybrechts, P., Gregory, J. M. <https://centaur.reading.ac.uk/view/creators/90000874.html> orcid:0000-0003-1296-8644 and Lowe, J. A. (2005) Elimination of the Greenland Ice Sheet in a High CO2 Climate. Journal Of Climate, 18 (17). pp. 3409-3427. ISSN 1520-0442 doi: https://doi.org/10.1175/JCLI3482.1 <https://doi.org/10.1175/JCLI3482.1> 551 Geology hydrology meteorology Article NonPeerReviewed 2005 ftunivreading https://doi.org/10.1175/JCLI3482.1 2024-06-11T14:41:45Z Projections of future global sea level depend on reliable estimates of changes in the size of polar ice sheets. Calculating this directly from global general circulation models (GCMs) is unreliable because the coarse resolution of 100 km or more is unable to capture narrow ablation zones, and ice dynamics is not usually taken into account in GCMs. To overcome these problems a high-resolution (20 km) dynamic ice sheet model has been coupled to the third Hadley Centre Coupled Ocean-Atmosphere GCM (HadCM3). A novel feature is the use of two-way coupling, so that climate changes in the GCM drive ice mass changes in the ice sheet model that, in turn, can alter the future climate through changes in orography, surface albedo, and freshwater input to the model ocean. At the start of the main experiment the atmospheric carbon dioxide concentration was increased to 4 times the preindustrial level and held constant for 3000 yr. By the end of this period the Greenland ice sheet is almost completely ablated and has made a direct contribution of approximately 7 m to global average sea level, causing a peak rate of sea level rise of 5 mm yr-1 early in the simulation. The effect of ice sheet depletion on global and regional climate has been examined and it was found that apart from the sea level rise, the long-term effect on global climate is small. However, there are some significant regional climate changes that appear to have reduced the rate at which the ice sheet ablates. Article in Journal/Newspaper Greenland Ice Sheet CentAUR: Central Archive at the University of Reading Greenland Journal of Climate 18 17 3409 3427 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
op_collection_id |
ftunivreading |
language |
unknown |
topic |
551 Geology hydrology meteorology |
spellingShingle |
551 Geology hydrology meteorology Ridley, J. K. Huybrechts, P. Gregory, J. M. Lowe, J. A. Elimination of the Greenland Ice Sheet in a High CO2 Climate |
topic_facet |
551 Geology hydrology meteorology |
description |
Projections of future global sea level depend on reliable estimates of changes in the size of polar ice sheets. Calculating this directly from global general circulation models (GCMs) is unreliable because the coarse resolution of 100 km or more is unable to capture narrow ablation zones, and ice dynamics is not usually taken into account in GCMs. To overcome these problems a high-resolution (20 km) dynamic ice sheet model has been coupled to the third Hadley Centre Coupled Ocean-Atmosphere GCM (HadCM3). A novel feature is the use of two-way coupling, so that climate changes in the GCM drive ice mass changes in the ice sheet model that, in turn, can alter the future climate through changes in orography, surface albedo, and freshwater input to the model ocean. At the start of the main experiment the atmospheric carbon dioxide concentration was increased to 4 times the preindustrial level and held constant for 3000 yr. By the end of this period the Greenland ice sheet is almost completely ablated and has made a direct contribution of approximately 7 m to global average sea level, causing a peak rate of sea level rise of 5 mm yr-1 early in the simulation. The effect of ice sheet depletion on global and regional climate has been examined and it was found that apart from the sea level rise, the long-term effect on global climate is small. However, there are some significant regional climate changes that appear to have reduced the rate at which the ice sheet ablates. |
format |
Article in Journal/Newspaper |
author |
Ridley, J. K. Huybrechts, P. Gregory, J. M. Lowe, J. A. |
author_facet |
Ridley, J. K. Huybrechts, P. Gregory, J. M. Lowe, J. A. |
author_sort |
Ridley, J. K. |
title |
Elimination of the Greenland Ice Sheet in a High CO2 Climate |
title_short |
Elimination of the Greenland Ice Sheet in a High CO2 Climate |
title_full |
Elimination of the Greenland Ice Sheet in a High CO2 Climate |
title_fullStr |
Elimination of the Greenland Ice Sheet in a High CO2 Climate |
title_full_unstemmed |
Elimination of the Greenland Ice Sheet in a High CO2 Climate |
title_sort |
elimination of the greenland ice sheet in a high co2 climate |
publisher |
American Meteorological Society |
publishDate |
2005 |
url |
https://centaur.reading.ac.uk/5148/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
Ridley, J. K., Huybrechts, P., Gregory, J. M. <https://centaur.reading.ac.uk/view/creators/90000874.html> orcid:0000-0003-1296-8644 and Lowe, J. A. (2005) Elimination of the Greenland Ice Sheet in a High CO2 Climate. Journal Of Climate, 18 (17). pp. 3409-3427. ISSN 1520-0442 doi: https://doi.org/10.1175/JCLI3482.1 <https://doi.org/10.1175/JCLI3482.1> |
op_doi |
https://doi.org/10.1175/JCLI3482.1 |
container_title |
Journal of Climate |
container_volume |
18 |
container_issue |
17 |
container_start_page |
3409 |
op_container_end_page |
3427 |
_version_ |
1802644886865838080 |