DOI: 10.1002/2013GL058748
论文题名: Global imaging of polar cap patches with dual airglow imagers
作者: Hosokawa K. ; Taguchi S. ; Shiokawa K. ; Otsuka Y. ; Ogawa Y. ; Nicolls M.
刊名: Geophysical Research Letters
ISSN: 0094-10503
EISSN: 1944-10234
出版年: 2014
卷: 41, 期: 1 起始页码: 1
结束页码: 6
语种: 英语
英文关键词: airglow
; convection
; ionosphere
; polar cap patches
Scopus关键词: airglow
; Airglow emissions
; Airglow structures
; Incoherent scatter radar
; Local time
; Plasma streams
; Polar cap patches
; Super dual auroral radar network
; Earth sciences
; Geophysics
; Heat convection
; Ionosphere
; F region
; airglow
; atmospheric electricity
; F region
; global climate
; ice cap
; image analysis
; polar region
; Arctic
; Longyearbyen
; Spitsbergen
; Svalbard
; Svalbard and Jan Mayen
英文摘要: During a 2 h interval from 2240 to 2440 UT on 12 November 2012, regions of increased 630.0 nm airglow emissions were simultaneously detected by dual all-sky imagers in the polar cap, one at Longyearbyen, Norway (78.1°N, 15.5°E) and the other at Resolute Bay, Canada (74.7°N, 265.1°E). The Resolute Bay incoherent scatter radar observed clear enhancements of the F region electron density up to 1012 m-3 within these airglow structures which indicates that these are optical manifestations of polar cap patches propagating across the polar cap. During this interval of simultaneous airglow imaging, the nightside/dawnside (dayside/duskside) half of the patches was captured by the imager at Longyearbyen (Resolute Bay). This unique situation enabled us to estimate the dawn-dusk extent of the patches to be around 1500 km, which was at least 60-70% of the width of the antisunward plasma stream seen in the Super Dual Auroral Radar Network convection maps. In contrast to the large extent in the dawn-dusk direction, the noon-midnight thickness of each patch was less than 500 km. These observations demonstrate that there exists a class of patches showing cigar-shaped structures. Such patches could be produced in a wide range of local time on the dayside nearly simultaneously and spread across many hours of local time soon after their generation. Key Points Image the entire shape of polar cap patches by combining dual airglow imagers Shape of the patches was much more elongated in the dawn-dusk direction Patches could be produced in a wide range of local time nearly simultaneously © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896730422&doi=10.1002%2f2013GL058748&partnerID=40&md5=12bbfd529c152a9b7c04a39a83818ebf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7767
Appears in Collections: 气候减缓与适应
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作者单位: Department of Communication Engineering and Informatics, University of Electro-Communications, Tokyo, Japan
Recommended Citation:
Hosokawa K.,Taguchi S.,Shiokawa K.,et al. Global imaging of polar cap patches with dual airglow imagers[J]. Geophysical Research Letters,2014-01-01,41(1).