Numerical simulation of Martian historical dynamo: Impact of the Rayleigh number on the dynamo state

被引：3

作者：

Wang TianYuan ^{[1
]}

Kuang WeiJia ^{[2
]}

Ma ShiZhuang ^{[1
]}

机构：

[1] Chinese Acad Sci, Grad Univ, Lab Computat Geodynam, Beijing 100049, Peoples R China

[2] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Greenbelt, MD 20771 USA

来源：

SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2009年 / 52卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Mars; magnetic field; Rayleigh number; dynamo; MAGNETIC-FIELD; SNC METEORITES; CORE FORMATION; MARS; MANTLE; CONVECTION; MODEL; FLUID; MAP;

D O I：

10.1007/s11430-009-0034-y

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The observed Mars remnant magnetism suggests that there was an active dynamo in the Martian core. We use the MoSST core dynamics model to simulate the Martian historical dynamo, focusing on the variation of the dynamo states with the Rayleigh number Ra (a non-dimensional parameter describing the buoyancy force in the core). Our numerical results show that the mean field length scale does not vary monotonically with the Rayleigh number, and the field morphology at the core mantle boundary changes with Rayleigh number. In particular, it drifts westward with a speed decreasing with Rayleigh number.

引用

页码：402 / 410

页数：9

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