Topside ionosphere He+ density depletions: Seasonal/longitudinal occurrence probability

被引：13
|
作者：
Sidorova, L. N. [1 ]
Filippov, S. V. [1 ]
机构：
[1] Pushkov Inst Terr Magnetism Ionosphere & Radiowav, Troitsk 142190, Moscow Region, Russia
来源：
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2012年 / 86卷
基金：
俄罗斯基础研究基金会;
关键词：
He+ density depletions (HDDs); Topside ionosphere; Plasma bubbles; Equatorial F-region irregularities (EFIs); EQUATORIAL SPREAD-F; MAGNETIC-DECLINATION CONTROL; LIGHT-ION TROUGH; PLASMA BUBBLES; IRREGULARITIES; SCINTILLATIONS; SUBTROUGH; RELEVANT; MODEL;
D O I：
10.1016/j.jastp.2012.06.013
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The idea of an equatorial origin of the He+ density depletions (HDDs) was validated once again. For this purpose. detailed comparative analysis of their longitudinal occurrence distributions (for all seasons and different hemispheres) was made. The distributions during the equinox periods were found to be very similar to the distributions of the equatorial F-region irregularities (EFIs), equatorial spread F (EFS) and equatorial plasma bubbles (EPBs). However, the similarity was not so good for the solstice periods due to complex influence of the seasonal factor, "magnetic declination effect" and thermospheric meridional winds. The results obtained may be considered as new evidence supporting the idea of the plasma bubble origin of the HDDs. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：83 / 91
页数：9
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