| DOI: | 10.1002/2014GL061803
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| 论文题名: | A rapid decrease of the hydrogen corona of Mars |
| 作者: | Clarke J.T.; Bertaux J.-L.; Chaufray J.-Y.; Gladstone G.R.; Quemerais E.; Wilson J.K.; Bhattacharyya D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9581
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| EISSN: | 1944-9312
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| 出版年: | 2014
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| 卷: | 41, 期:22 | | 起始页码: | 8013
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| 结束页码: | 8020
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| 语种: | 英语
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| 英文关键词: | atmosphere
; escape
; Mars
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| Scopus关键词: | Atoms
; Earth atmosphere
; Hydrogen
; Molecules
; Storms
; Surface waters
; Atmospheric water
; escape
; Hubble space telescopes
; Lower atmosphere
; Mars
; Martian atmospheres
; Seasonal changes
; Solar UV radiation
; Solar power generation
; corona
; crust
; hydrogen
; Mars
; Martian atmosphere
; ultraviolet radiation
; water content
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| 英文摘要: | Mars is believed to have lost much of its surface water 3.5 billion years ago, but the amounts that escaped into space and remain frozen in the crust today are not well known. Hydrogen atoms in the extended martian atmosphere, some of which escape the planet's gravity, can be imaged through scattered solar UV radiation. Hubble Space Telescope (HST) images of the ultraviolet H Ly α emission now indicate that the coronal H density steadily decreased by a factor of roughly 40% over 4 weeks, a far greater variation than had been expected. The leading candidate cause is a decrease in the source rate of water molecules from the lower atmosphere, consistent with seasonal changes and a recent global dust storm. This implies that the rate of escape of martian hydrogen (and thereby water) into space is strongly dependent on the lower atmospheric water content and distribution. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923381565&doi=10.1002%2f2014GL061803&partnerID=40&md5=1fd35f1b379e74add2391578220321a8
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6845
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Center for Space Physics, Boston University, Boston, MA, United States
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| Recommended Citation: | |
Clarke J.T.,Bertaux J.-L.,Chaufray J.-Y.,et al. A rapid decrease of the hydrogen corona of Mars[J]. Geophysical Research Letters,2014-01-01,41(22).
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