A study of the Weddell Sea Anomaly observed by FORMOSAT-3/COSMIC

doi:10.1029/2009JA014175

	A study of the Weddell Sea Anomaly observed by FORMOSAT-3/COSMIC
	He, Maosheng 1,2; Liu, Libo 1; Wan, Weixing 1; Ning, Baiqi 1; Zhao, Biqiang 1; Wen, Jin 1,2; Yue, Xin'an 1; Le, Huijun 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2009-12-09
卷号	114
ISSN号	0148-0227
DOI	10.1029/2009JA014175
文献子类	Article
英文摘要	More than two years of COSMIC electron density profiles at low solar activities are collected to study the evolution of the Weddell Sea Anomaly (WSA), which appears as an evening enhancement in electron density during local summer. Observations show that the change in NmF2 (the F2 peak electron density) is associated with the change in hmF2 (the F2 peak height), while the latter is correlated closely with the components of the geomagnetic field. We find that (1) in the afternoon, hmF2 is more liable to rise drastically in regions with a larger \|sin(2I)\| value, which would occur early at certain declinations, eastward in the southern hemisphere and westward in the northern hemisphere; (2) subsequently, a larger increment of hmF2 is coincidentally followed by a stronger enhancement of NmF2 and the enhancement ends just around the local sunset; and (3) in midlatitudes, the evolution pattern of hmF2 in the evening of equinoxes and winter is similar to that in summer, albeit without a lasting NmF2 enhancement as that in summer. These features suggest that the NmF2 enhancement and the hmF2 increase could arise from the thermospheric wind effect, and solar photoionization plays a crucial role in the enhancement as well. The general midlatitude F2 layer enhancement in local summer evening is consistent with the WSA on the above features, indicating that the WSA is a manifestation, with a particular geometry of the magnetic field, of the evening enhancement induced by the winds.
WOS关键词	ATMOSPHERE RADAR OBSERVATIONS ; THERMOSPHERIC WINDS ; IONOSPHERIC F2-PEAK ; MILLSTONE HILL ; SATELLITE DATA ; GLOBAL-MODEL ; F-LAYER ; CLIMATOLOGY ; LATITUDES ; F2-LAYER
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000272717300001
资助机构	National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; 40674090 ; 40674090 ; 40674090 ; 40674090 ; 40636032) ; 40636032) ; 40636032) ; 40636032) ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; 40674090 ; 40674090 ; 40674090 ; 40674090 ; 40636032) ; 40636032) ; 40636032) ; 40636032) ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; 40674090 ; 40674090 ; 40674090 ; 40674090 ; 40636032) ; 40636032) ; 40636032) ; 40636032) ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Natural Science Foundation of China(40725014 ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; National Important Basic Research Project(2006CB806306) ; 40674090 ; 40674090 ; 40674090 ; 40674090 ; 40636032) ; 40636032) ; 40636032) ; 40636032)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71030]
专题	中国科学院地质与地球物理研究所
通讯作者	He, Maosheng
作者单位	1.Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	He, Maosheng,Liu, Libo,Wan, Weixing,et al. A study of the Weddell Sea Anomaly observed by FORMOSAT-3/COSMIC[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2009,114.
APA	He, Maosheng.,Liu, Libo.,Wan, Weixing.,Ning, Baiqi.,Zhao, Biqiang.,...&Le, Huijun.(2009).A study of the Weddell Sea Anomaly observed by FORMOSAT-3/COSMIC.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,114.
MLA	He, Maosheng,et al."A study of the Weddell Sea Anomaly observed by FORMOSAT-3/COSMIC".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 114(2009).