DOI: 10.1002/2017JE005383
Scopus记录号: 2-s2.0-85042376774
论文题名: Dependence of the Onset of the Runaway Greenhouse Effect on the Latitudinal Surface Water Distribution of Earth-Like Planets
作者: Kodama T. ; Nitta A. ; Genda H. ; Takao Y. ; O'ishi R. ; Abe-Ouchi A. ; Abe Y.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 2 起始页码: 559
结束页码: 574
语种: 英语
英文关键词: atmospheric circulation
; habitable planets
; runaway greenhouse effect
Scopus关键词: greenhouse effect
; Hadley cell
; latitude
; planet
; surface water
; topography
英文摘要: Liquid water is one of the most important materials affecting the climate and habitability of a terrestrial planet. Liquid water vaporizes entirely when planets receive insolation above a certain critical value, which is called the runaway greenhouse threshold. This threshold forms the inner most limit of the habitable zone. Here we investigate the effects of the distribution of surface water on the runaway greenhouse threshold for Earth-sized planets using a three-dimensional dynamic atmosphere model. We considered a 1 bar atmosphere whose composition is similar to the current Earth's atmosphere with a zonally uniform distribution of surface water. As previous studies have already showed, we also recognized two climate regimes: the land planet regime, which has dry low-latitude and wet high-latitude regions, and the aqua planet regime, which is globally wet. We showed that each regime is controlled by the width of the Hadley circulation, the amount of surface water, and the planetary topography. We found that the runaway greenhouse threshold varies continuously with the surface water distribution from about 130% (an aqua planet) to 180% (the extreme case of a land planet) of the present insolation at Earth's orbit. Our results indicate that the inner edge of the habitable zone is not a single sharp boundary, but a border whose location varies depending on planetary surface condition, such as the amount of surface water. Since land planets have wider habitable zones and less cloud cover, land planets would be good targets for future observations investigating planetary habitability. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114494
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan; Center for Earth Surface System Dynamics, Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan; Now at Tokyo Marine and Nichido Fire Insurance Co., Ltd., Tokyo, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Japan; Now at International Affairs Department, Tokyo Institute of Technology, Tokyo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Recommended Citation:
Kodama T.,Nitta A.,Genda H.,et al. Dependence of the Onset of the Runaway Greenhouse Effect on the Latitudinal Surface Water Distribution of Earth-Like Planets[J]. Journal of Geophysical Research: Planets,2018-01-01,123(2)