DOI: 10.1002/2014GL062748
论文题名: North-south asymmetry of the high-latitude thermospheric density: IMF BY effect
作者: Yamazaki Y. ; Kosch M.J. ; Sutton E.K.
刊名: Geophysical Research Letters
ISSN: 0094-9053
EISSN: 1944-8784
出版年: 2015
卷: 42, 期: 2 起始页码: 225
结束页码: 232
语种: 英语
英文关键词: atmospheric density
; CHAMP satellite
; high latitudes
; IMF By effect
; north-south asymmetry
; thermosphere
Scopus关键词: Atmospheric density
; Ionosphere
; Challenging minisatellite payloads
; Geomagnetic activities
; Hemi-spheric asymmetries
; High Latitudes
; IMF B<sub>y</sub> effect
; Interplanetary magnetic fields
; North-south asymmetry
; Thermosphere
; Geomagnetism
; airflow
; asymmetry
; atmospheric modeling
; geomagnetic field
; latitude
; plasma
; thermosphere
英文摘要: Previous studies have established that the y component of the interplanetary magnetic field (IMF By) plays a role in the north-south asymmetry of the high-latitude plasma convection and wind. The effect of the positive/negative IMF By in the Northern Hemisphere resembles the effect that the negative/positive IMF By would have in the Southern Hemisphere. In this study, we demonstrate that the IMF By effect can also contribute to the hemispheric asymmetry of the thermospheric density. We use high-accuracy air drag measurements from the CHAllenging Minisatellite Payload (CHAMP) satellite and SuperMAG AE index during the period 2001-2006 to examine the response of the high-latitude thermospheric density to geomagnetic activity. Our statistical analysis reveals that the density response at 400 km is greater in the Southern Hemisphere under positive IMF By conditions, and greater in the Northern Hemisphere under negative IMF By conditions. The results suggest that the IMF By effect needs to be taken into account in upper atmospheric modeling for an accurate description of high-latitude densities during periods of enhanced geomagnetic activity. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923583822&doi=10.1002%2f2014GL062748&partnerID=40&md5=c839892291f6071592e138f75509419d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8669
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics, Lancaster University, Lancaster, United Kingdom
Recommended Citation:
Yamazaki Y.,Kosch M.J.,Sutton E.K.. North-south asymmetry of the high-latitude thermospheric density: IMF BY effect[J]. Geophysical Research Letters,2015-01-01,42(2).