Planetary Magnetic Dynamo Effect on Atmospheric Protection of Early Earth and Mars

被引：0

作者：

Dehant, V. ^{[1
]}

Lammer, H. ^{[2
]}

Kulikov, Y. N. ^{[3
]}

Griessmeier, J. -M. ^{[4
]}

Breuer, D. ^{[5
]}

Verhoeven, O. ^{[1
]}

Karatekin, O. ^{[1
]}

Van Hoolst, T. ^{[1
]}

Korablev, O. ^{[6
]}

Lognonne, P. ^{[7
]}

机构：

[1] Royal Observ Belgium, Brussels, Belgium

[2] Austrian Acad Sci, Space Res Inst, Graz, Austria

[3] Russian Acad Sci, Polar Geophys Inst, Apatity, Russia

[4] Observ Paris, Paris, France

[5] DLR, Berlin, Germany

[6] Space Res Inst, Moscow, Russia

[7] Inst Phys Globe Paris, Paris, France

来源：

GEOLOGY AND HABITABILITY OF TERRESTRIAL PLANETS | 2007年 / 24卷

关键词：

Habitability; Rotation; Magnetic field; Atmospheric escape;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In light of assessing the habitability of Mars, we examine the impact of the magnetic field on the atmosphere. When there is a magnetic field, the atmosphere is protected from erosion by solar wind. The magnetic field ensures the maintenance of a dense atmosphere, necessary for liquid water to exist on the surface of Mars. We also examine the impact of the rotation of Mars on the magnetic field. When the magnetic field of Mars ceased to exist (about 4 Gyr ago), atmospheric escape induced by solar wind began. We consider scenarios which could ultimately lead to a decrease of atmospheric pressure to the presently observed value of 7 mbar: a much weaker early martian magnetic field, a late onset of the dynamo, and high erosion rates of a denser early atmosphere.

引用

页码：279 / 300

页数：22

共 138 条

[51] A global solution for the Mars static and seasonal gravity, Mars orientation, Phobos and Deimos masses, and Mars ephemeris [J].