| DOI: | 10.1002/2016GL068994
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| 论文题名: | Methane in the lunar exosphere: Implications for solar wind carbon escape |
| 作者: | Hodges R.R.; Jr.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8956
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| EISSN: | 1944-8687
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| 出版年: | 2016
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| 卷: | 43, 期:13 | | 起始页码: | 6742
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| 结束页码: | 6748
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| 语种: | 英语
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| 英文关键词: | carbon
; escape
; methane
; Moon
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| Scopus关键词: | Activation energy
; Carbon
; Ionosphere
; Moon
; Apollo samples
; Dust environment
; Escape
; Lunar atmospheres
; Lunar exospheres
; Peak concentrations
; Rate of escapes
; Topographic features
; Methane
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| 英文摘要: | A positive identification of methane in the lunar exosphere has been made in data from the neutral mass spectrometer on the Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft. Like argon-40, methane is adsorbed on the lunar surface during nighttime. However, higher activation energies for methane delay its desorption at sunrise by about an hour local time, creating a postsunrise bulge with peak concentration of approximately 400–450 molecules cm−3 at a reference altitude of 12 km, which is just above the highest topographic feature on the Moon. The rate of escape of carbon as methane derived from the LADEE data is estimated to be in the range 1.5–4.5 × 1021 s−1. A lower bound for solar carbon escape derived separately from Apollo sample analyses is 3.4 × 1021 s−1. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978194465&doi=10.1002%2f2016GL068994&partnerID=40&md5=1740b0ed08220f3fd84920962f22523e
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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/9919
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States
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| Recommended Citation: | |
Hodges R.R.,Jr.. Methane in the lunar exosphere: Implications for solar wind carbon escape[J]. Geophysical Research Letters,2016-01-01,43(13).
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