Global ULF waves generated by a hot flow anomaly

doi:10.1002/2017GL073249

CORC > 北京大学 > 地球与空间科学学院

	Global ULF waves generated by a hot flow anomaly
	Zhao, L. L. ; Zhang, H. ; Zong, Q. G.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2017
关键词	hot flow anomaly ULF waves discontinuity bow shock EARTHS BOW SHOCK SOLAR-WIND DIAMAGNETIC CAVITIES OSCILLATIONS EVOLUTION
DOI	10.1002/2017GL073249
英文摘要	Hot flow anomalies (HFAs), which are frequently observed near Earth's bow shock, are phenomena resulting from the interaction between interplanetary discontinuities and Earth's bow shock. Such transient phenomena upstream the bow shock can cause significant deformation of the bow shock and the magnetosphere, generating traveling convection vortices, field-aligned currents, and ULF waves in the Earth's magnetosphere. A large HFA (4.9R(E)) was observed by Cluster on 27 April 2008. Nearly monochromatic Pc 3 ULF waves generated by the HFA were observed by multiple spacecrafts and ground stations. The ULF waves show characteristics of standing Alfven waves. The wave power of the poloidal mode of the generated ULF waves is stronger than that of the toroidal mode. Polarization rotation from the poloidal mode to the toroidal mode is also observed. The Pc 3 ULF waves generated by the HFA were observed at dawn, noon, dusk sectors, and nightside, indicating that the Pc 3 ULF wave response of the magnetosphere to the HFA is global. Our results show that the impact of HFAs to the magnetosphere is much stronger than what we thought before.; National Natural Science Foundation of China [41421003, 41627805]; NSF [AGS-1303689, AGS-1352669]; SCI(E); ARTICLE; 11; 5283-5291; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472762]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhao, L. L.,Zhang, H.,Zong, Q. G.. Global ULF waves generated by a hot flow anomaly[J]. GEOPHYSICAL RESEARCH LETTERS,2017.
APA	Zhao, L. L.,Zhang, H.,&Zong, Q. G..(2017).Global ULF waves generated by a hot flow anomaly.GEOPHYSICAL RESEARCH LETTERS.
MLA	Zhao, L. L.,et al."Global ULF waves generated by a hot flow anomaly".GEOPHYSICAL RESEARCH LETTERS (2017).