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  4. 中国科学院地球与行星物理重点实验室
Westward Electric Fields in the Afternoon Equatorial Ionosphere During Geomagnetically Quiet Times

文献类型：期刊论文

作者Zhang, Ruilong3,4,5; Liu, Libo2,3,4,5; Yu, You2,3,4,5; Le, Huijun2,3,4,5; Chen, Yiding1,3,4,5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2020-12-01
卷号125期号:12页码:12
ISSN号2169-9380
DOI10.1029/2020JA028532
英文摘要The daytime average zonal electric field is well known to be eastward in the equatorial ionosphere. Geomagnetic observations have revealed that the equatorial electrojet or zonal electric field occasionally becomes westward in the afternoon sector during quiet times. We present the first analysis of the dependence of the afternoon downward plasma drifts on the season, longitude, solar activity, and lunar phase using the ROCSAT-1 satellite observations during 1999-2004. The results show that there are similar to 20% of downward plasma drifts at 13-17 LT. The occurrence rate of the downward plasma drift shows a peak around January and a secondary peak in July. The occurrence rate presents a slight decrease trend with the solar activity. Especially, the occurrence rate can attain similar to 40-50% around 60 degrees E in June solstice and 145-245 degrees E in December solstice, which is nearly comparable with the occurrence rate of the upward plasma drifts in these longitudes. The downward plasma drift occurs most frequently around the full moon in the afternoon sector. The geomagnetic declination induces the hemispheric differences in the dynamo current in the conjugate regions and controls the occurrence of the westward electric fields. A wavenumber-4 longitudinal structure also appears to be present in the occurrence rate in June-September, and the wavenumber-4 peak coincides with the diurnal eastward tidal wind, which drives the generation of the westward electric fields.
WOS关键词LATENT-HEAT RELEASE ; F-REGION ; COUNTER-ELECTROJET ; PLASMA DRIFTS ; WIND MODEL ; MIDDLE ; TIDES ; HEIGHT
资助项目B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Key Research and Development Program[2018YFC1503504] ; National Key Research and Development Program[2017YFE0131400] ; National Natural Science Foundation of China[42030202] ; National Natural Science Foundation of China[41904140] ; National Natural Science Foundation of China[41822403] ; National Natural Science Foundation of China[41774161] ; National Postdoctoral Program for Innovative Talents[BX20180301] ; China Postdoctoral Science Foundation[2018M640175] ; Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000603639900017
出版者AMER GEOPHYSICAL UNION
资助机构B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/99927]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Liu, Libo
作者单位1.Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Mohe Observ Geophys, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Ruilong,Liu, Libo,Yu, You,et al. Westward Electric Fields in the Afternoon Equatorial Ionosphere During Geomagnetically Quiet Times[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(12):12.
APA Zhang, Ruilong,Liu, Libo,Yu, You,Le, Huijun,&Chen, Yiding.(2020).Westward Electric Fields in the Afternoon Equatorial Ionosphere During Geomagnetically Quiet Times.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(12),12.
MLA Zhang, Ruilong,et al."Westward Electric Fields in the Afternoon Equatorial Ionosphere During Geomagnetically Quiet Times".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.12(2020):12.

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来源：地质与地球物理研究所

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