Climate sensitivity study with energy balance models
In this thesis, the sensitivity of the Earth's climate is studied by modeling past climatic variations with two-dimensional seasonal energy balance model. This thesis consists of two parts. The first part is a study of the interaction between the seasonal cycle and the small ice cap instability...
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fttriple:oai:gotriple.eu:http://hdl.handle.net/2142/21016 2023-05-15T16:38:09+02:00 Climate sensitivity study with energy balance models Huang, Jin Bowman, Kenneth P. 2011-05-07 http://hdl.handle.net/2142/21016 en eng (UMI)AAI9210843 AAI9210843 http://hdl.handle.net/2142/21016 IDEALS geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2011 fttriple 2023-01-22T17:09:15Z In this thesis, the sensitivity of the Earth's climate is studied by modeling past climatic variations with two-dimensional seasonal energy balance model. This thesis consists of two parts. The first part is a study of the interaction between the seasonal cycle and the small ice cap instability, which is a possible mechanism for the initiation of glaciation in the northern hemisphere and southern hemisphere. Results from a two-dimensional energy balance model with a realistic land-ocean distribution show that the small ice cap instability exists in the southern hemisphere, but not in the northern hemisphere. A series of experiments with a one-dimensional energy balance model with idealized geography is used to study the roles of the seasonal cycle and the land-ocean distribution. The results indicate that the seasonal cycle and land-ocean distribution can influence the strength of the albedo feedback, which is responsible for the small ice cap instability, through two factors: the temperature gradient and the amplitude of the seasonal cycle. The second part of this thesis is a study of the CO$\sb2$-climate feedback and its possible role in the 41 kyr sea surface temperature oscillation during the Matuyama chron (2.4 to 0.7 Myr BP). The CO$\sb2$-climate feedback is parameterized as an internal longwave radiation-polar temperature feedback in the energy balance model. Other physical processes are treated as boundary conditions. It is found that the CO$\sb2$-climate feedback can increase climate sensitivity to orbital parameters, especially to the obliquity changes, which have a 41 kyr cycle. The model results indicate that the CO$\sb2$-climate feedback is one of possible mechanisms for the dominant 41 kyr climate change during the Matuyama. (Abstract shortened with permission of author.) U of I Only ETDs are only available to UIUC Users without author permission Text Ice cap Unknown |
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geo envir Huang, Jin Climate sensitivity study with energy balance models |
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In this thesis, the sensitivity of the Earth's climate is studied by modeling past climatic variations with two-dimensional seasonal energy balance model. This thesis consists of two parts. The first part is a study of the interaction between the seasonal cycle and the small ice cap instability, which is a possible mechanism for the initiation of glaciation in the northern hemisphere and southern hemisphere. Results from a two-dimensional energy balance model with a realistic land-ocean distribution show that the small ice cap instability exists in the southern hemisphere, but not in the northern hemisphere. A series of experiments with a one-dimensional energy balance model with idealized geography is used to study the roles of the seasonal cycle and the land-ocean distribution. The results indicate that the seasonal cycle and land-ocean distribution can influence the strength of the albedo feedback, which is responsible for the small ice cap instability, through two factors: the temperature gradient and the amplitude of the seasonal cycle. The second part of this thesis is a study of the CO$\sb2$-climate feedback and its possible role in the 41 kyr sea surface temperature oscillation during the Matuyama chron (2.4 to 0.7 Myr BP). The CO$\sb2$-climate feedback is parameterized as an internal longwave radiation-polar temperature feedback in the energy balance model. Other physical processes are treated as boundary conditions. It is found that the CO$\sb2$-climate feedback can increase climate sensitivity to orbital parameters, especially to the obliquity changes, which have a 41 kyr cycle. The model results indicate that the CO$\sb2$-climate feedback is one of possible mechanisms for the dominant 41 kyr climate change during the Matuyama. (Abstract shortened with permission of author.) U of I Only ETDs are only available to UIUC Users without author permission |
author2 |
Bowman, Kenneth P. |
format |
Text |
author |
Huang, Jin |
author_facet |
Huang, Jin |
author_sort |
Huang, Jin |
title |
Climate sensitivity study with energy balance models |
title_short |
Climate sensitivity study with energy balance models |
title_full |
Climate sensitivity study with energy balance models |
title_fullStr |
Climate sensitivity study with energy balance models |
title_full_unstemmed |
Climate sensitivity study with energy balance models |
title_sort |
climate sensitivity study with energy balance models |
publishDate |
2011 |
url |
http://hdl.handle.net/2142/21016 |
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Ice cap |
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Ice cap |
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IDEALS |
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(UMI)AAI9210843 AAI9210843 http://hdl.handle.net/2142/21016 |
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1766028446884954112 |