Equatorial spread F-related currents: Three-dimensional simulations and observations

被引：22

作者：

Aveiro, H. C. ^{[1
]}

Hysell, D. L. ^{[1
]}

Park, J. ^{[2
]}

Luehr, H. ^{[2
]}

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

[2] GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, D-14473 Potsdam, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2011年 / 38卷

关键词：

CHAMP SATELLITE; PLASMA BUBBLES; REGION; RADAR;

D O I：

10.1029/2011GL049586

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A three-dimensional numerical simulation of plasma density irregularities in the postsunset equatorial F region ionosphere leading to equatorial spread F (ESF) is described. Simulated satellite passes are compared with CHAMP magnetometer observations. The comparisons imply that magnetic perturbations parallel to the main field are mainly due to diamagnetic currents flowing on the external walls of the plasma depletions. The divergence of the transverse currents generate field-aligned currents flowing poleward (equatorward) on the external edges of the western (eastern) walls of the depletions which are furthermore detectable in the transverse magnetic field components. That the simulation is electrostatic argues against an Alfvenic interpretation of all of the CHAMP magnetic field observations in ESF. Citation: Aveiro, H. C., D. L. Hysell, J. Park, and H. Luhr (2011), Equatorial spread F-related currents: Three-dimensional simulations and observations, Geophys. Res. Lett., 38, L21103, doi: 10.1029/2011GL049586.

引用

页数：5

共 14 条

[1] EQUATORIAL BUBBLES UPDRAFTING AT SUPERSONIC SPEEDS [J].