The magnetospheric driver of subauroral ion drifts

被引：43

作者：

De Keyser, J ^{[1
]}

Roth, M ^{[1
]}

Lemaire, J ^{[1
]}

机构：

[1] Inst Aeron Spatiale Belgique, B-1180 Brussels, Belgium

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 10期

关键词：

D O I：

10.1029/98GL01135

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Subauroral ion drifts (SAID) are narrow layers of intense westward ionospheric flow observed during substorms. We present numerical simulations showing that the combined effect of thermo-electric and convection electric fields in a magnetospheric current sheet-when mapped down to the ionosphere-can account for the westward direction of the ion drift, the width and intensity of the drift speed peak, and the lifetime of SAID. The model can also explain why SAID occur mainly in the pre-midnight sector.

引用

页码：1625 / 1628

页数：4

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