The role of enhanced thermal pressure in the earthward motion of the Earth's magnetopause

J. H. Shue, J. K. Chao

研究成果: 雜誌貢獻期刊論文同行評審

31 引文 斯高帕斯(Scopus)

摘要

The magnetopause is the thin boundary between the solar wind and the Earth's magnetic field. The magnetopause moves earthward as the total pressure just inside the magnetopause is reduced or the total pressure just outside the magnetopause is enhanced. It has been suggested for more than four decades that field-aligned currents, created by magnetic reconnection for southward interplanetary magnetic field, reduce the magnetic pressure just inside the magnetopause. Under the assumption of a constant total pressure just outside the magnetopause, the magnetopause consequently moves earthward. Here we show that the reduced magnetic pressure just inside the magnetopause is insufficient to account for its earthward motion to its real location. For this to happen, an enhancement in the total pressure just outside the magnetopause is required. Our observations also reveal that the enhanced thermal pressure is the major contributor to the total pressure enhancement. Key Points Total pressure just outside the magnetopause is enhanced for southward IMF. Enhanced thermal pressure is the main contributor to total pressure enhancement. A larger dynamic pressure contributes more thermal pressure on the magnetopause.

原文???core.languages.en_GB???
頁(從 - 到)3017-3026
頁數10
期刊Journal of Geophysical Research: Space Physics
118
發行號6
DOIs
出版狀態已出版 - 6月 2013

指紋

深入研究「The role of enhanced thermal pressure in the earthward motion of the Earth's magnetopause」主題。共同形成了獨特的指紋。

引用此