DOI: 10.1002/grl.50149
论文题名: Phobos 2/ASPERA data revisited: Planetary ion escape rate from Mars near the 1989 solar maximum
作者: Ramstad R. ; Futaana Y. ; Barabash S. ; Nilsson H. ; Martin Del Campo B S. ; Lundin R. ; Schwingenschuh K.
刊名: Geophysical Research Letters
ISSN: 0094-9342
EISSN: 1944-9073
出版年: 2013
卷: 40, 期: 3 起始页码: 477
结束页码: 481
语种: 英语
英文关键词: Mars
; Phobos 2
; Planetary ion escape
; Solar maximum
Scopus关键词: Electric fields
; Heavy ions
; Solar wind
; Equatorial orbits
; Frame of reference
; Mars
; Measurement results
; Phobos 2
; Planetary ion escape
; Solar maxima
; Space environment
; Planets
; Earth
; ion
; Mars
; Martian atmosphere
英文摘要: Insights about the near-Mars space environment from Mars Express observations have motivated a revisit of the Phobos 2/ASPERA ion data from 1989. We have expanded the analysis to now include all usable heavy ion (O +, O2+, CO2+) measurements from the circular orbits of Phobos 2. Phobos 2/ASPERA ion fluxes in the Martian tail are compared with previous results obtained by the instruments on Phobos 2. Further validation of the measurement results is obtained by comparing IMP-8 and Phobos 2/ASPERA solar wind ion fluxes, taking into account the time lag between Earth and Mars. Heavy ion flux measurements from 18 circular equatorial orbits around Mars are bin-averaged to a grid, using the MSE (electric field) frame of reference. The binned data are subsequently integrated to determine the total escape rate of planetary ions. From this we derive a total planetary heavy ion escape rate of (2-3) × 1025 s-1 from Mars for the 1989 solar maximum. Key Points The heavy ion escape rate in 1989 was ~10 times higher than at solar minimum Use of Mars Express data for physically correct Phobos-2 counts-flux conversion First Phobos-2 escape rate analysis not based on old erroneous assumptions ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878168074&doi=10.1002%2fgrl.50149&partnerID=40&md5=46bdfee752f143f0bcca7a7423dc0860
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6606
Appears in Collections: 气候减缓与适应
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作者单位: Swedish Institute of Space Physics, Kiruna, Sweden
Recommended Citation:
Ramstad R.,Futaana Y.,Barabash S.,et al. Phobos 2/ASPERA data revisited: Planetary ion escape rate from Mars near the 1989 solar maximum[J]. Geophysical Research Letters,2013-01-01,40(3).