DOI: 10.1002/2016GL071519
论文题名: Unexpected characteristics of the 150 km echoes observed over Gadanki and their implications
作者: Patra A.K. ; Pavan Chaitanya P.
刊名: Geophysical Research Letters
ISSN: 0094-8433
EISSN: 1944-8164
出版年: 2016
卷: 43, 期: 21 起始页码: 11129
结束页码: 11136
语种: 英语
英文关键词: 150 km echoes
Scopus关键词: Photons
; 150km echoes
; Competing process
; Kinetic simulation
; Plasma fluctuations
; Potential mechanism
; Radar observations
; Seasonal dependence
; Solar minima
; Photoelectrons
英文摘要: Recent discovery of two distinct types of 150 km echoes, namely, type-A and type-B, and subsequent progress in the large-scale kinetic simulation of photoelectron-induced plasma waves have begun a new era in resolving the five decades long 150 km echoing riddle. In this paper, we present hitherto unrevealed three important and unexpected findings on the two distinct types of 150 km echoes based on Gadanki radar observations. Our observations show unexpected predominance of type-A echoes, strong seasonal dependence of both type-A and type-B echoes, and a surprising connection of the type-B echoes to the unusually deep solar minimum of 2008–2009. We discuss how these results provide important new clues in tethering the competing processes involved in the daytime 150 km echoes and have significance in the recently proposed photoelectron-induced plasma fluctuations as a potential mechanism for the 150 km echoes. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84997712087&doi=10.1002%2f2016GL071519&partnerID=40&md5=b31c9b30c15ec113a0c5feb552e93dc2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9396
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: National Atmospheric Research Laboratory, Gadanki, India
Recommended Citation:
Patra A.K.,Pavan Chaitanya P.. Unexpected characteristics of the 150 km echoes observed over Gadanki and their implications[J]. Geophysical Research Letters,2016-01-01,43(21).