Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle
A two-dimensional (2-D) seasonal model has been developed for stimulating the transient response of the climate system to the astronomical forcing. The atmosphere is represented by a zonally averaged quasi-geostrophic model which includes accurate treatment of radiative transfer. The atmospheric mod...
Published in: | Transactions of the Royal Society of Edinburgh: Earth Sciences |
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Online Access: | http://hdl.handle.net/2078.1/63723 https://doi.org/10.1017/S026359330002085X |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:63723 2024-05-12T08:04:27+00:00 Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle Berger, André Fichefet, Thierry Gallee, H. Marsiat, I. Tricot, C. van Ypersele de Strihou, Jean-Pascal Symposium on the late Cenozoic ice age UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate 1990 http://hdl.handle.net/2078.1/63723 https://doi.org/10.1017/S026359330002085X eng eng Royal Soc Edinburgh boreal:63723 http://hdl.handle.net/2078.1/63723 doi:10.1017/S026359330002085X urn:ISSN:0263-5933 Royal Society of Edinburgh. Transactions. Earth Sciences, Vol. 81, p. 357-369 (1990) Astronomical Theory Milankovitch Theory Paleoclimates Quaternary Climates Climatic Variations Modeling Climatic Variations Last Interglacial Glacial Cycle info:eu-repo/semantics/conferenceObject 1990 ftunivlouvain https://doi.org/10.1017/S026359330002085X 2024-04-17T17:29:34Z A two-dimensional (2-D) seasonal model has been developed for stimulating the transient response of the climate system to the astronomical forcing. The atmosphere is represented by a zonally averaged quasi-geostrophic model which includes accurate treatment of radiative transfer. The atmospheric model interacts with the other components of the climate system (ocean, sea-ice and land surface covered or not by snow and ice) through vertical fluxes of momentum, heat and humidity. The model explicitly incorporates surface energy balances and has snow and sea-ice mass budgets. The vertical profile of the upper-ocean temperature is computed by an interactive mixed-layer model which takes into account the meridional turbulent diffusion of heat. This model is asynchronously coupled to a model which simulates the dynamics of the Greenland, the northern American and the Eurasian ice sheets. Over the last glacial-interglacial cycle, the coupled model simulates climatic changes which are in general agreement with the low frequency part of the deep-sea, ice and sea-level records. However, after 6000 yBP, the remaining ice volume of the Greenland and northern American ice sheets is overestimated in the simulation. The simulated climate is sensitive to the initial size of the Greenland ice sheet, to the ice-albedo positive feedback, to the precipitation-altitude negative feedback over the ice sheets, to the albedo of the aging snow and to the insolation increase, particularly at the southern edge of the ice sheets, which is important for their collapse or surge. Conference Object Greenland Ice Sheet Sea ice DIAL@UCLouvain (Université catholique de Louvain) Greenland Transactions of the Royal Society of Edinburgh: Earth Sciences 81 4 357 369 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
Astronomical Theory Milankovitch Theory Paleoclimates Quaternary Climates Climatic Variations Modeling Climatic Variations Last Interglacial Glacial Cycle |
spellingShingle |
Astronomical Theory Milankovitch Theory Paleoclimates Quaternary Climates Climatic Variations Modeling Climatic Variations Last Interglacial Glacial Cycle Berger, André Fichefet, Thierry Gallee, H. Marsiat, I. Tricot, C. van Ypersele de Strihou, Jean-Pascal Symposium on the late Cenozoic ice age Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
topic_facet |
Astronomical Theory Milankovitch Theory Paleoclimates Quaternary Climates Climatic Variations Modeling Climatic Variations Last Interglacial Glacial Cycle |
description |
A two-dimensional (2-D) seasonal model has been developed for stimulating the transient response of the climate system to the astronomical forcing. The atmosphere is represented by a zonally averaged quasi-geostrophic model which includes accurate treatment of radiative transfer. The atmospheric model interacts with the other components of the climate system (ocean, sea-ice and land surface covered or not by snow and ice) through vertical fluxes of momentum, heat and humidity. The model explicitly incorporates surface energy balances and has snow and sea-ice mass budgets. The vertical profile of the upper-ocean temperature is computed by an interactive mixed-layer model which takes into account the meridional turbulent diffusion of heat. This model is asynchronously coupled to a model which simulates the dynamics of the Greenland, the northern American and the Eurasian ice sheets. Over the last glacial-interglacial cycle, the coupled model simulates climatic changes which are in general agreement with the low frequency part of the deep-sea, ice and sea-level records. However, after 6000 yBP, the remaining ice volume of the Greenland and northern American ice sheets is overestimated in the simulation. The simulated climate is sensitive to the initial size of the Greenland ice sheet, to the ice-albedo positive feedback, to the precipitation-altitude negative feedback over the ice sheets, to the albedo of the aging snow and to the insolation increase, particularly at the southern edge of the ice sheets, which is important for their collapse or surge. |
author2 |
UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate |
format |
Conference Object |
author |
Berger, André Fichefet, Thierry Gallee, H. Marsiat, I. Tricot, C. van Ypersele de Strihou, Jean-Pascal Symposium on the late Cenozoic ice age |
author_facet |
Berger, André Fichefet, Thierry Gallee, H. Marsiat, I. Tricot, C. van Ypersele de Strihou, Jean-Pascal Symposium on the late Cenozoic ice age |
author_sort |
Berger, André |
title |
Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
title_short |
Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
title_full |
Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
title_fullStr |
Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
title_full_unstemmed |
Physical Interactions Within a Coupled Climate Model Over the Last Glacial Interglacial Cycle |
title_sort |
physical interactions within a coupled climate model over the last glacial interglacial cycle |
publisher |
Royal Soc Edinburgh |
publishDate |
1990 |
url |
http://hdl.handle.net/2078.1/63723 https://doi.org/10.1017/S026359330002085X |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Sea ice |
genre_facet |
Greenland Ice Sheet Sea ice |
op_source |
Royal Society of Edinburgh. Transactions. Earth Sciences, Vol. 81, p. 357-369 (1990) |
op_relation |
boreal:63723 http://hdl.handle.net/2078.1/63723 doi:10.1017/S026359330002085X urn:ISSN:0263-5933 |
op_doi |
https://doi.org/10.1017/S026359330002085X |
container_title |
Transactions of the Royal Society of Edinburgh: Earth Sciences |
container_volume |
81 |
container_issue |
4 |
container_start_page |
357 |
op_container_end_page |
369 |
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1798846656394821632 |