Pumping out the atmosphere of Mars through solar wind pressure pulses

被引：95

作者：

Edberg, N. J. T. ^{[1
,4
]}

Nilsson, H. ^{[2
]}

Williams, A. O. ^{[1
]}

Lester, M. ^{[1
]}

Milan, S. E. ^{[1
]}

Cowley, S. W. H. ^{[1
]}

Franz, M. ^{[3
]}

Barabash, S. ^{[2
]}

Futaana, Y. ^{[2
]}

机构：

[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[2] Swedish Inst Space Phys, SE-98128 Kiruna, Sweden

[3] Max Planck Inst Solar Syst Res, D-37191 Katlenburg Lindau, Germany

[4] Swedish Inst Space Phys, Uppsala, Sweden

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

GLOBAL SURVEYOR; MAGNETIC-FIELD; EXPRESS; EROSION;

D O I：

10.1029/2009GL041814

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We study atmospheric escape from Mars during solar wind pressure pulses. During the solar minimum of 2007 08 we have observed 41 high pressure events, which are predominantly identified as corotating interaction regions (CIR) while a few are coronal mass ejections (CME), in data from the Advanced Composition Explorer (ACE) upstream of the Earth. 36 of these events are also identified using Mars Express (MEX) data at Mars. We use MEX measurements at Mars to compare the antisunward fluxes of heavy planetary ions during the passage of these pulses to the fluxes during quiet solar wind conditions. The ion fluxes are observed to increase by a factor of similar to 2.5, on average. Hence, a third of the total outflow from Mars takes place during similar to 15% of the time, when a solar wind pressure pulse impacts on the planet. This can have important consequences for the total time-integrated outflow of plasma from Mars. Citation: Edberg, N. J. T., H. Nilsson, A. O. Williams, M. Lester, S. E. Milan, S. W. H. Cowley, M. Franz, S. Barabash, and Y. Futaana (2010), Pumping out the atmosphere of Mars through solar wind pressure pulses, Geophys. Res. Lett., 37, L03107, doi:10.1029/2009GL041814.

引用

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