Global sounding of F region irregularities by COSMIC during a geomagnetic storm

doi:10.5194/angeo-37-235-2019

CORC > 国家天文台 > 中国科学院国家天文台

	Global sounding of F region irregularities by COSMIC during a geomagnetic storm
	Hocke, Klemens 2,3; Liu, Huixin 4; Pedatella, Nicholas 1; Ma, Guanyi 5
刊名	ANNALES GEOPHYSICAE
	2019-04-16
卷号	37 期号:2 页码:235-242
ISSN号	0992-7689
DOI	10.5194/angeo-37-235-2019
英文摘要	We analyse reprocessed electron density profiles and total electron content (TEC) profiles of the ionosphere in September 2008 (around solar minimum) and September 2013 (around solar maximum) obtained by the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC/FORMOSAT-3). The TEC profiles describe the total electron content along the ray path from the GPS satellite to the low Earth orbit as function of the tangent point of the ray. Some of the profiles in the magnetic polar regions show small-scale fluctuations on spatial scales < 50 km. Possibly the trajectory of the tangent point intersects spatial electron density irregularities in the magnetic polar region. For derivation of the morphology of the electron density and TEC fluctuations, a 50 km high-pass filter is applied in the s domain, where s is the distance between a reference point (bottom tangent point) and the tangent point. For each profile, the mean of the fluctuations is calculated for tangent point altitudes between 400 and 500 km. At first glance, the global maps of Delta N-e and Delta TEC are quite similar. However, Delta TEC might be more reliable since it is based on fewer retrieval assumptions. We find a significant difference if the arithmetic mean or the median is applied to the global map of September 2013. In agreement with literature, Delta TEC is enhanced during the post-sunset rise of the equatorial ionosphere in September 2013, which is associated with spread F and equatorial plasma bubbles. The global map of Delta TEC at solar maximum (September 2013) has stronger fluctuations than those at solar minimum (September 2008). We obtained new results when we compare the global maps of the quiet phase and the storm phase of the geomagnetic storm of 15 July 2012. It is evident that the TEC fluctuations are increased and extended over the southern magnetic polar region at the day of the geomagnetic storm. The north-south asymmetry of the storm response is more pronounced in the upper ionosphere (ray tangent points h = 400-500 km) than in the lower ionosphere (ray tangent points h = 200-300 km).
资助项目	Swiss National Science Foundation[200021-165516] ; US National Science Foundation[AGS-1033112] ; National Science Foundation ; JSPS KAKENHI[18H01270] ; JSPS KAKENHI[18H04446] ; JSPS KAKENHI[17KK0095] ; National Natural Science Foundation of China (NSFC)[11473045] ; National Natural Science Foundation of China (NSFC)[11503040]
WOS关键词	GPS/MET RADIO OCCULTATION ; IONOSPHERIC IRREGULARITIES ; GPS ; MORPHOLOGY
WOS研究方向	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000464678900001
资助机构	Swiss National Science Foundation ; Swiss National Science Foundation ; US National Science Foundation ; US National Science Foundation ; National Science Foundation ; National Science Foundation ; JSPS KAKENHI ; JSPS KAKENHI ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Swiss National Science Foundation ; Swiss National Science Foundation ; US National Science Foundation ; US National Science Foundation ; National Science Foundation ; National Science Foundation ; JSPS KAKENHI ; JSPS KAKENHI ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Swiss National Science Foundation ; Swiss National Science Foundation ; US National Science Foundation ; US National Science Foundation ; National Science Foundation ; National Science Foundation ; JSPS KAKENHI ; JSPS KAKENHI ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Swiss National Science Foundation ; Swiss National Science Foundation ; US National Science Foundation ; US National Science Foundation ; National Science Foundation ; National Science Foundation ; JSPS KAKENHI ; JSPS KAKENHI ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/26009]
专题	中国科学院国家天文台
通讯作者	Hocke, Klemens
作者单位	1.Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA 2.Univ Bern, Inst Appl Phys, Bern, Switzerland 3.Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland 4.Kyushu Univ, Dept Earth & Planetary Sci, Fukuoka, Fukuoka, Japan 5.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Hocke, Klemens,Liu, Huixin,Pedatella, Nicholas,et al. Global sounding of F region irregularities by COSMIC during a geomagnetic storm[J]. ANNALES GEOPHYSICAE,2019,37(2):235-242.
APA	Hocke, Klemens,Liu, Huixin,Pedatella, Nicholas,&Ma, Guanyi.(2019).Global sounding of F region irregularities by COSMIC during a geomagnetic storm.ANNALES GEOPHYSICAE,37(2),235-242.
MLA	Hocke, Klemens,et al."Global sounding of F region irregularities by COSMIC during a geomagnetic storm".ANNALES GEOPHYSICAE 37.2(2019):235-242.