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Ion Energization and Escape on Mars and Venus
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2011 (English)In: Space Science Reviews, ISSN 0038-6308, E-ISSN 1572-9672, Vol. 162, no 1-4, 173-211 p.Article, review/survey (Refereed) Published
Abstract [en]

Mars and Venus do not have a global magnetic field and as a result solar wind interacts directly with their ionospheres and upper atmospheres. Neutral atoms ionized by solar UV, charge exchange and electron impact, are extracted and scavenged by solar wind providing a significant loss of planetary volatiles. There are different channels and routes through which the ionized planetary matter escapes from the planets. Processes of ion energization driven by direct solar wind forcing and their escape are intimately related. Forces responsible for ion energization in different channels are different and, correspondingly, the effectiveness of escape is also different. Classification of the energization processes and escape channels on Mars and Venus and also their variability with solar wind parameters is the main topic of our review. We will distinguish between classical pickup and 'mass-loaded' pickup processes, energization in boundary layer and plasma sheet, polar winds on unmagnetized planets with magnetized ionospheres and enhanced escape flows from localized auroral regions in the regions filled by strong crustal magnetic fields.

Place, publisher, year, edition, pages
2011. Vol. 162, no 1-4, 173-211 p.
Keyword [en]
Mars: magnetosphere, Mars: ionosphere, Venus: magnetosphere, Venus: ionosphere, Sun: solar wind
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-168011DOI: 10.1007/s11214-011-9831-7ISI: 000297846700006OAI: oai:DiVA.org:uu-168011DiVA: diva2:489842
Available from: 2012-02-03 Created: 2012-02-03 Last updated: 2012-02-03Bibliographically approved

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Edberg, Niklas
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Swedish Institute of Space Physics, Uppsala Division
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