globalchange  > 气候减缓与适应
DOI: 10.1002/2013GL058578
论文题名:
Unexpected variability of Martian hydrogen escape
作者: Chaffin M.S.; Chaufray J.-Y.; Stewart I.; Montmessin F.; Schneider N.M.; Bertaux J.-L.
刊名: Geophysical Research Letters
ISSN: 0094-10435
EISSN: 1944-10166
出版年: 2014
卷: 41, 期:2
起始页码: 314
结束页码: 320
语种: 英语
英文关键词: atmospheric escape ; Jeans escape ; Mars ; Mars Express ; SPICAM
Scopus关键词: Hydrogen ; Spacecraft ; Atmospheric escape ; Jeans escape ; Mars ; MARS-EXPRESS ; SPICAM ; Storms ; atmospheric chemistry ; climate variation ; flow field ; Martian atmosphere ; ultraviolet radiation ; water availability
英文摘要: Mars today is much drier than the Earth, though they likely began with similar relative amounts of water. One potential cause for this discrepancy is hydrogen loss to space, which may have removed a large fraction of Mars' initial water. Here we demonstrate an order-of-magnitude change in the Martian hydrogen escape rate in 2007, inconsistent with established models for the source of escaping hydrogen. We analyze 121.6 nm (hydrogen Lyman-α) airglow observations made by the ultraviolet spectrometer on the Mars Express spacecraft over the second half of 2007. The enhanced escape rates we observe may be due to lower atmospheric heating and overturn during the 2007 (Mars Year 28) global dust storm, suggesting that hydrogen escape from Mars during dust storms may dominate loss of the planet's water inventory. This scenario has major implications for reconstructing the total amount of water lost to space over Martian history. ©2013. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892643047&doi=10.1002%2f2013GL058578&partnerID=40&md5=6e38abc58398b242b694e9222e2d25bc
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被引频次[WOS]:119   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7699
Appears in Collections:气候减缓与适应

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作者单位: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States

Recommended Citation:
Chaffin M.S.,Chaufray J.-Y.,Stewart I.,et al. Unexpected variability of Martian hydrogen escape[J]. Geophysical Research Letters,2014-01-01,41(2).
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