Dependence of thermospheric zonal winds on solar flux, geomagnetic activity, and hemisphere as measured by CHAMP

doi:10.1002/2016JA023715

CORC > 地质与地球物理研究所 > 中国科学院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

	Dependence of thermospheric zonal winds on solar flux, geomagnetic activity, and hemisphere as measured by CHAMP
	Zhang, Xiaofang 1; Liu, Libo 1,2; Liu, Songtao 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2017-08-01
卷号	122 期号:8 页码:8893-8914
关键词	thermospheric zonal wind ionosphere-thermosphere coupling solar activity geomagnetic storms north-south asymmetries subauroral polarization streams
ISSN号	2169-9380
DOI	10.1002/2016JA023715
文献子类	Article
英文摘要	The thermospheric zonal winds measured by the CHAllenging Minisatellite Payload (CHAMP) satellite are used to statistically determine the climatology under quiet and active geomagnetic conditions. By collectively analyzing the bin-averaged wind trend with F-10.7 and the solar-induced difference in wind structures, the solar flux dependence of global thermosphere zonal wind is determined. The increase of solar flux enhances the eastward winds at low latitudes from dusk to midnight. The increased ion drag reduces the nighttime eastward wind in the subauroral latitudes, and the daytime westward winds from 06 to 08 MLT at all latitudes decrease with increasing solar flux. Zonal winds show coupled seasonal/extreme ultraviolet (EUV) dependency. The equatorial zonal winds from 18 to 04 magnetic local time (MLT) indicate weaker eastward winds during the June solstice at high solar flux levels. Quiet time eastward winds at subauroral latitudes from 16 to 20 MLT are further decreased in the winter hemisphere. Influenced by asymmetries in solar illumination and the magnetic field, zonal winds show hemispheric asymmetries. Quiet daytime winds are additionally influenced by solar illumination effects, and the westward winds at the middle and subauroral latitudes are always stronger in the summer. The nighttime eastward winds are higher in the winter hemisphere during the solstices, as in the Southern Hemisphere during equinoxes, with the winter-summer asymmetry lessened or receding at the solar maxima. Storm-induced subauroral westward disturbance winds are higher in the summer hemisphere and in the Northern Hemisphere during equinoxes. At a high level of solar flux, the westward disturbance winds are comparable in the two hemispheres during December solstice. Geomagnetic disturbance wind observations from CHAMP agree well with the empirical geomagnetic disturbance wind model, except for stronger subauroral westward jets. Westward winds during the afternoon may be enhanced in the auroral latitudes before the initial time of a storm main phase.
WOS关键词	PEROT-INTERFEROMETER MEASUREMENTS ; F-REGION DISTURBANCE ; NEUTRAL WINDS ; UPPER-ATMOSPHERE ; MILLSTONE HILL ; MAGNETIC STORMS ; ELECTRIC-FIELDS ; PLASMA DRIFTS ; MASS DENSITY ; ION DRIFTS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000411788800070
资助机构	National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; National Key Basic Research Program of China(2012CB825604) ; National Key Basic Research Program of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; National Key Basic Research Program of China(2012CB825604) ; National Key Basic Research Program of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; National Key Basic Research Program of China(2012CB825604) ; National Key Basic Research Program of China(2012CB825604) ; 41621063) ; 41621063) ; National Natural Science Foundation of China(41231065 ; National Natural Science Foundation of China(41231065 ; National Key Basic Research Program of China(2012CB825604) ; National Key Basic Research Program of China(2012CB825604) ; 41621063) ; 41621063)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61937]
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, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaofang,Liu, Libo,Liu, Songtao. Dependence of thermospheric zonal winds on solar flux, geomagnetic activity, and hemisphere as measured by CHAMP[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(8):8893-8914.
APA	Zhang, Xiaofang,Liu, Libo,&Liu, Songtao.(2017).Dependence of thermospheric zonal winds on solar flux, geomagnetic activity, and hemisphere as measured by CHAMP.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(8),8893-8914.
MLA	Zhang, Xiaofang,et al."Dependence of thermospheric zonal winds on solar flux, geomagnetic activity, and hemisphere as measured by CHAMP".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.8(2017):8893-8914.