气候变化领域集成服务门户(CCPortal): Unexpected High Occurrence of Daytime F-Region Backscatter Plume Structures Over Low Latitude Sanya and Their Possible Origin

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DOI	10.1029/2020GL090517
	Unexpected High Occurrence of Daytime F-Region Backscatter Plume Structures Over Low Latitude Sanya and Their Possible Origin
	Xie H.; Yang S.; Zhao X.; Hu L.; Sun W.; Wu Z.; Ning B.; Liu L.; Li G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Ionospheric F-region irregularity backscatter plumes are commonly regarded as a nighttime phenomenon at equatorial and low latitudes. Using the Sanya (18.4°N, 109.6°E, dip lat. 12.8°N) VHF radar, F-region backscatter echoes were observed at daytime during 0700–1800 LT, with an unexpected high occurrence in June solstice of solar minimum. Radar interferometry and ICON satellite in situ results show that the daytime F-region echoes were from plume structures consisting of field-aligned irregularities. The daytime echoing structures appeared mostly above 350 km altitude, extending up to 650 km or more with apparent westward drifts at times. We surmise that the daytime F-region echoes were due to equatorial plasma bubble irregularities generated on the previous night around 100–125°E, where the irregularities could survive unexpectedly long time, beyond sunrise as vertically elongated fossil plumes. Under the ionospheric background dynamics, the fossil plumes could be elevated to high altitudes and drift zonally over Sanya. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Backscattering; Radar; Equatorial and low latitudes; Equatorial plasma bubble; Field-aligned irregularities; Low latitudes; Plume structure; Radar interferometry; Solar minima; VHF radar; F region; altitude; backscatter; in situ measurement; interferometry; ionosphere; radar imagery; radar interferometry; China; Hainan; Sanya
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/169409
作者单位	Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Xie H.,Yang S.,Zhao X.,et al. Unexpected High Occurrence of Daytime F-Region Backscatter Plume Structures Over Low Latitude Sanya and Their Possible Origin[J],2020,47(22).
APA	Xie H..,Yang S..,Zhao X..,Hu L..,Sun W..,...&Li G..(2020).Unexpected High Occurrence of Daytime F-Region Backscatter Plume Structures Over Low Latitude Sanya and Their Possible Origin.Geophysical Research Letters,47(22).
MLA	Xie H.,et al."Unexpected High Occurrence of Daytime F-Region Backscatter Plume Structures Over Low Latitude Sanya and Their Possible Origin".Geophysical Research Letters 47.22(2020).