No glacial-interglacial cycle in the ice volume simulated under a constant astronomical forcing and a variable CO2
The relative impact of the CO2 concentration on climate-over the last 200 kyr is investigated here using the Louvain-la-Neuve 2-dimension Northern Hemisphere (LLN 2-D NH) climate model forced by different constant insolations and the variable CO2 concentration reconstructed from the Vostok ice-core...
Published in: | Geophysical Research Letters |
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Main Authors: | , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2000
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Subjects: | |
Online Access: | http://hdl.handle.net/2078.1/43665 https://doi.org/10.1029/1999GL006081 |
Summary: | The relative impact of the CO2 concentration on climate-over the last 200 kyr is investigated here using the Louvain-la-Neuve 2-dimension Northern Hemisphere (LLN 2-D NH) climate model forced by different constant insolations and the variable CO2 concentration reconstructed from the Vostok ice-core record. Under such conditions the 100-kyr cycle in-the Northern Hemisphere ice volume cannot be reproduced. Either a warm orbit prevents the ice sheets from forming-or a present-day and colder orbits do not allow them tol:melt:after being formed. The global hemispheric temperature,, however, continues to respond directly to the atmospheric CO2-concentration changes. |
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