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...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1991
|
Subjects: | |
Online Access: | http://hdl.handle.net/2142/21016 |
id |
ftunivillidea:oai:www.ideals.illinois.edu:2142/21016 |
---|---|
record_format |
openpolar |
spelling |
ftunivillidea:oai:www.ideals.illinois.edu:2142/21016 2024-10-13T14:08:00+00:00 Climate sensitivity study with energy balance models Huang, Jin Bowman, Kenneth P. 1991 http://hdl.handle.net/2142/21016 eng eng AAI9210843 (UMI)AAI9210843 http://hdl.handle.net/2142/21016 Copyright 1991 Huang, Jin Physical Oceanography Paleoecology Physics Atmospheric Science text 1991 ftunivillidea 2024-10-01T12:57:43Z 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.) Made available in DSpace on 2011-05-07T12:55:52Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9210843.pdf: 4684861 bytes, checksum: 82e9af1e63c79ac052e09e5b7070d6b8 ... Text Ice cap University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) |
institution |
Open Polar |
collection |
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) |
op_collection_id |
ftunivillidea |
language |
English |
topic |
Physical Oceanography Paleoecology Physics Atmospheric Science |
spellingShingle |
Physical Oceanography Paleoecology Physics Atmospheric Science Huang, Jin Climate sensitivity study with energy balance models |
topic_facet |
Physical Oceanography Paleoecology Physics Atmospheric Science |
description |
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.) Made available in DSpace on 2011-05-07T12:55:52Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9210843.pdf: 4684861 bytes, checksum: 82e9af1e63c79ac052e09e5b7070d6b8 ... |
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 |
1991 |
url |
http://hdl.handle.net/2142/21016 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_relation |
AAI9210843 (UMI)AAI9210843 http://hdl.handle.net/2142/21016 |
op_rights |
Copyright 1991 Huang, Jin |
_version_ |
1812814589314727936 |