气候变化领域集成服务门户(CCPortal): The Two-Dimensional Evolution of Thermospheric ∑O/N2 Response to Weak Geomagnetic Activity During Solar-Minimum Observed by GOLD

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DOI	10.1029/2020GL088838
	The Two-Dimensional Evolution of Thermospheric ∑O/N2 Response to Weak Geomagnetic Activity During Solar-Minimum Observed by GOLD
	Cai X.; Burns A.G.; Wang W.; Qian L.; Solomon S.C.; Eastes R.W.; Pedatella N.; Daniell R.E.; McClintock W.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	We conduct observational and modeling studies of thermospheric composition responses to weak geomagnetic activity (nongeomagnetic storms). We found that the thermospheric O and N2 column density ratio (∑O/N2) in part of the Northern Hemisphere measured by Global-scale Observations of the Limb and Disk (GOLD) exhibited large and long-lived depletions during weak geomagnetic activity in May and June 2019. The depletions reached 30% of quiet time values, extended equatorward to 10°N and lasted more than 10 hr. Furthermore, numerical simulation results are similar to these observations and indicate that the ∑O/N2 depletions were pushed westward by zonal winds. The ∑O/N2 evolution during weak geomagnetic activity suggests that the formation mechanism of the ∑O/N2 depletions is similar to that during a geomagnetic storm. The effects of weak geomagnetic activity are often ignored but, in fact, are important for understanding thermosphere neutral composition variability and hence the state of the thermosphere-ionosphere system. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Gold; Ionosphere; Storms; Column density; Formation mechanism; Geomagnetic activities; Geomagnetic storm; Global scale; Northern Hemispheres; Thermosphere-ionosphere; Thermospheric composition; Geomagnetism; formation mechanism; geomagnetic field; ionosphere; Northern Hemisphere; solar activity; storm; thermosphere; two-dimensional modeling; zonal wind
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169735
作者单位	High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Ionospheric Physics, Stoughton, MA, United States
推荐引用方式 GB/T 7714	Cai X.,Burns A.G.,Wang W.,et al. The Two-Dimensional Evolution of Thermospheric ∑O/N2 Response to Weak Geomagnetic Activity During Solar-Minimum Observed by GOLD[J],2020,47(18).
APA	Cai X..,Burns A.G..,Wang W..,Qian L..,Solomon S.C..,...&McClintock W.E..(2020).The Two-Dimensional Evolution of Thermospheric ∑O/N2 Response to Weak Geomagnetic Activity During Solar-Minimum Observed by GOLD.Geophysical Research Letters,47(18).
MLA	Cai X.,et al."The Two-Dimensional Evolution of Thermospheric ∑O/N2 Response to Weak Geomagnetic Activity During Solar-Minimum Observed by GOLD".Geophysical Research Letters 47.18(2020).