Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model
This paper describes a sectorially averaged seasonal model developed for simulating the long-term response of the climate system to the astronomical forcing. The model domain covers the northern hemisphere. The atmospheric dynamics is represented by an improved zonally averaged quasi-geostrophic mod...
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Online Access: | http://hdl.handle.net/2078.1/50995 https://doi.org/10.1029/91JD00874 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:50995 2024-05-12T08:05:21+00:00 Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model Gallee, H. van Ypersele de Strihou, Jean-Pascal Fichefet, Thierry Tricot, C. Berger, André UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate 1991 http://hdl.handle.net/2078.1/50995 https://doi.org/10.1029/91JD00874 eng eng Amer Geophysical Union boreal:50995 http://hdl.handle.net/2078.1/50995 doi:10.1029/91JD00874 urn:ISSN:0148-0227 Journal of Geophysical Research, Vol. 96, no. D7, p. 13139-13161 (1991) info:eu-repo/semantics/article 1991 ftunivlouvain https://doi.org/10.1029/91JD00874 2024-04-17T17:30:22Z This paper describes a sectorially averaged seasonal model developed for simulating the long-term response of the climate system to the astronomical forcing. The model domain covers the northern hemisphere. The atmospheric dynamics is represented by an improved zonally averaged quasi-geostrophic model. It includes a new parameterization of the meridional transport of quasi-geostrophic potential vorticity and a parameterization of the Hadley sensible heat transport. The atmosphere 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 water vapor. The model explicity incorporates detailed radiative transfer, surface energy balances, and snow and sea ice budgets. The vertical profile of the upper ocean temperature is computed by an integral mixed-layer model which takes into account meridional convergence of heat. Sea ice is represented by a thermodynamic model including leads and a new parameterization for lateral accretion. This paper presents the model climate for present conditions and results of sensitivity experiments obtained by modifying some internal parameters or by deactivating certain parameterizations in the model. Simulation of the present climate shows that the model is able to reproduce the main characteristics of the general circulation and, in particular, the surface wind field. The seasonal cycles of oceanic mixed layer, sea ice, and snow cover are also well reproduced. Sensitivity experiments show the importance of the meridional sensible heat transport by the Hadley circulation in the tropics, the seasonal cycle of the oceanic mixed-layer depth and sea ice formation in latitude bands where the average water temperature is above the freezing point. In a forthcoming paper, this model will be coupled to an ice sheet model and applied to the simulation of the last glacial cycle in the northern hemisphere. Article in Journal/Newspaper Ice Sheet Sea ice DIAL@UCLouvain (Université catholique de Louvain) Journal of Geophysical Research 96 D7 13139 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
description |
This paper describes a sectorially averaged seasonal model developed for simulating the long-term response of the climate system to the astronomical forcing. The model domain covers the northern hemisphere. The atmospheric dynamics is represented by an improved zonally averaged quasi-geostrophic model. It includes a new parameterization of the meridional transport of quasi-geostrophic potential vorticity and a parameterization of the Hadley sensible heat transport. The atmosphere 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 water vapor. The model explicity incorporates detailed radiative transfer, surface energy balances, and snow and sea ice budgets. The vertical profile of the upper ocean temperature is computed by an integral mixed-layer model which takes into account meridional convergence of heat. Sea ice is represented by a thermodynamic model including leads and a new parameterization for lateral accretion. This paper presents the model climate for present conditions and results of sensitivity experiments obtained by modifying some internal parameters or by deactivating certain parameterizations in the model. Simulation of the present climate shows that the model is able to reproduce the main characteristics of the general circulation and, in particular, the surface wind field. The seasonal cycles of oceanic mixed layer, sea ice, and snow cover are also well reproduced. Sensitivity experiments show the importance of the meridional sensible heat transport by the Hadley circulation in the tropics, the seasonal cycle of the oceanic mixed-layer depth and sea ice formation in latitude bands where the average water temperature is above the freezing point. In a forthcoming paper, this model will be coupled to an ice sheet model and applied to the simulation of the last glacial cycle in the northern hemisphere. |
author2 |
UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Gallee, H. van Ypersele de Strihou, Jean-Pascal Fichefet, Thierry Tricot, C. Berger, André |
spellingShingle |
Gallee, H. van Ypersele de Strihou, Jean-Pascal Fichefet, Thierry Tricot, C. Berger, André Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
author_facet |
Gallee, H. van Ypersele de Strihou, Jean-Pascal Fichefet, Thierry Tricot, C. Berger, André |
author_sort |
Gallee, H. |
title |
Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
title_short |
Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
title_full |
Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
title_fullStr |
Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
title_full_unstemmed |
Simulation of the Last Glacial Cycle By a Coupled, Sectorially Averaged Climate-ice Sheet Model .1. the Climate Model |
title_sort |
simulation of the last glacial cycle by a coupled, sectorially averaged climate-ice sheet model .1. the climate model |
publisher |
Amer Geophysical Union |
publishDate |
1991 |
url |
http://hdl.handle.net/2078.1/50995 https://doi.org/10.1029/91JD00874 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_source |
Journal of Geophysical Research, Vol. 96, no. D7, p. 13139-13161 (1991) |
op_relation |
boreal:50995 http://hdl.handle.net/2078.1/50995 doi:10.1029/91JD00874 urn:ISSN:0148-0227 |
op_doi |
https://doi.org/10.1029/91JD00874 |
container_title |
Journal of Geophysical Research |
container_volume |
96 |
container_issue |
D7 |
container_start_page |
13139 |
_version_ |
1798847630327939072 |