DOI: 10.1002/2014GL060820
论文题名: Migration calculations for water in the exosphere of the Moon: Dusk-dawn asymmetry, heterogeneous trapping, and D/H fractionation
作者: Schorghofer N.
刊名: Geophysical Research Letters
ISSN: 0094-9907
EISSN: 1944-9638
出版年: 2014
卷: 41, 期: 14 起始页码: 4888
结束页码: 4893
语种: 英语
英文关键词: exosphere
; ice
; lunar water
; the Moon
Scopus关键词: Ice
; Ionosphere
; Molecules
; Poles
; Cold trapping
; exosphere
; Ice deposit
; Isotopic composition
; Lunar exospheres
; Lunar waters
; Spectral feature
; Water molecule
; Moon
; asymmetry
; comet
; fractionation
; ice
; isotopic composition
; Moon
; water flow
; Humulus
英文摘要: Water ice is trapped in permanently shadowed craters near the lunar poles, where it is thought to have arrived from an exogenic or endogenic source via ballistic hops. We use a model of the migration of water molecules in the lunar exosphere to investigate three problems: (1) A strong continuous source would lead to an enhanced concentration of H2O at the morning terminator but not at the evening terminator. Hence, spectral features observed at both terminators do not suggest that there is diurnal migration of volatiles. (2) Cold trapping after a comet impact leads to an unequal partitioning between the two hemispheres depending on the latitude of the impact but to nearly equal partitioning with respect to longitude. (3) The D/H fractionation as the water molecules migrate toward the poles is small. Hence, the isotopic composition of ice deposits in the cold traps can be related to that of the source. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904773875&doi=10.1002%2f2014GL060820&partnerID=40&md5=4998f8c992e0d193d3d7280fbc6b377a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7171
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Astronomy, NASA Astrobiology Institute, University of Hawaii at Ma'noa, Honolulu, HI, United States
Recommended Citation:
Schorghofer N.. Migration calculations for water in the exosphere of the Moon: Dusk-dawn asymmetry, heterogeneous trapping, and D/H fractionation[J]. Geophysical Research Letters,2014-01-01,41(14).