DOI: 10.1002/2016GL071071
论文题名: A cold-pole enhancement in Mercury's sodium exosphere
作者: Cassidy T.A. ; McClintock W.E. ; Killen R.M. ; Sarantos M. ; Merkel A.W. ; Vervack R.J. ; Jr. ; Burger M.H.
刊名: Geophysical Research Letters
ISSN: 0094-8431
EISSN: 1944-8162
出版年: 2016
卷: 43, 期: 21 起始页码: 11121
结束页码: 11128
语种: 英语
英文关键词: dynamics
; exosphere
; Mercury
Scopus关键词: Dynamics
; Ionosphere
; Mercury (metal)
; Orbits
; Poles
; Spectrometers
; Tracking (position)
; Bulk concentration
; Exosphere
; MErcury Surface
; Orbital missions
; Sodium atom
; Sodium exosphere
; Space environment
; Visible spectrometers
; Sodium
英文摘要: The ultraviolet and visible spectrometer component of the Mercury Atmospheric and Surface Composition Spectrometer on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging spacecraft characterized the local-time distribution of the sodium exosphere over the course of its orbital mission. The observations show that the sodium exosphere is enhanced above Mercury's cold-pole longitudes. Based on previously published sodium exosphere models, we infer that these regions act as night side surface reservoirs, temporary sinks to the exosphere that collect sodium atoms transported antisunward. The reservoirs are revealed as exospheric enhancements when they are exposed to sunlight. As in the models the reservoir is depleted as the cold poles rotate from dawn to dusk, but unlike the models the depletion is only partial. The persistence of the reservoir means that it could, over the course of geologically long periods of time, contribute to an increase in the bulk concentration of sodium near the cold-pole longitudes. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84997610663&doi=10.1002%2f2016GL071071&partnerID=40&md5=b84ede7d24ef1d4f5277f3ebf6996328
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9394
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
Recommended Citation:
Cassidy T.A.,McClintock W.E.,Killen R.M.,et al. A cold-pole enhancement in Mercury's sodium exosphere[J]. Geophysical Research Letters,2016-01-01,43(21).