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A study of the energy balance climate model with CO 2 ‐dependent outgoing radiation: Implication for the glaciation during the Cenozoic
Author(s) -
Ikeda Takashi,
Tajika Eiichi
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900298
Subject(s) - glacial period , cenozoic , northern hemisphere , atmospheric sciences , geology , earth's energy budget , climatology , environmental science , climate state , southern hemisphere , energy balance , climate change , radiation , physics , global warming , thermodynamics , paleontology , effects of global warming , structural basin , oceanography , quantum mechanics
We analyze the energy balance climate model with CO 2 ‐dependent outgoing radiation, and obtain the steady‐state solution for very wide range of the atmospheric CO 2 partial pressure and the thermal diffusion coefficient. We propose a phase diagram of the climate on the parameter space of the atmospheric CO 2 and the thermal diffusion coefficient for the latitudinal heat transport, which may be useful to understand the climate change through the history of the Earth. It is shown that the formation of polar ice caps can be caused by decrease in the atmospheric CO 2 and the latitudinal heat transport. The different history of glaciation in each hemisphere through the Cenozoic might be the result of difference in the heat transport in each hemisphere. Understanding of the small ice cap instability might be important to interpret the oxygen isotope record at the Eocene‐Oligocene boundary.