| DOI: | 10.1002/2015GL065465
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| 论文题名: | Water and water ions in the Martian thermosphere/ionosphere |
| 作者: | Fox J.L.; Benna M.; Mahaffy P.R.; Jakosky B.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8515
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| EISSN: | 1944-8246
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| 出版年: | 2015
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| 卷: | 42, 期:21 | | 起始页码: | 8977
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| 结束页码: | 8985
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| 语种: | 英语
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| 英文关键词: | atmosphere
; ionosphere
; Mars
; structure
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| Scopus关键词: | Earth atmosphere
; Ionospheric measurement
; Ions
; Structure (composition)
; Density profile
; Ion mass spectrometer
; Mars
; Mars atmosphere
; Measured values
; Photochemical modeling
; Protonated species
; Volatile evolution
; Ionosphere
; atmospheric structure
; density
; electron density
; hydroxyl radical
; instrumentation
; ion exchange
; ionosphere
; Martian atmosphere
; photochemistry
; prediction
; spacecraft
; thermosphere
; water
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| 英文摘要: | First results from the Neutral Gas and Ion Mass Spectrometer instrument on the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft reveal density profiles of protonated species that are mostly in good qualitative agreement with recent models of the Martian thermosphere/ionosphere. We present here the first photochemical model in which the density profiles of water and water ions in the ionosphere/thermosphere are predicted. We find that the computed peak densities of OH+, H2O+, and H3O+ are in fairly good agreement with the measured values. The computed column density of water is predicted to be about 1010 cm-2, and the mixing ratio at 80 km is 0.4 ppb. The actual water densities must be small enough so that HCO+ is not destroyed by proton transfer to water during the daytime and large enough so that H3O+ dominates the ionosphere at low altitudes just beyond the terminator. The calculations also show that the mass-2 ion is almost certainly H 2+. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955177407&doi=10.1002%2f2015GL065465&partnerID=40&md5=1fc23bd3958c8c8e5dbe75755b44d1f3
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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/8131
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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: | Department of Physics, Wright State University, Dayton, OH, United States
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| Recommended Citation: | |
Fox J.L.,Benna M.,Mahaffy P.R.,et al. Water and water ions in the Martian thermosphere/ionosphere[J]. Geophysical Research Letters,2015-01-01,42(21).
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