| DOI: | 10.1002/2013GL058245
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| 论文题名: | Large-scale structures in the Polar Rain |
| 作者: | Zhang Y.; Paxton L.; Kil H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8416
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| EISSN: | 1944-8147
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| 出版年: | 2013
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| 卷: | 40, 期:21 | | 起始页码: | 5576
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| 结束页码: | 5580
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| 语种: | 英语
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| 英文关键词: | flux transfer event
; Kelvin-Helmholtz wave
; polar rain electron
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| Scopus关键词: | Defense meteorological satellite program satellites
; Electron energy flux
; Flux transfer events
; Kelvin-Helmholtz
; Kelvin-Helmholtz waves
; Large-scale structure
; Polar rain
; Spatial structure
; Magnetopause
; Solar wind
; Wind effects
; Rain
; electron
; energy efficiency
; Kelvin-Helmholtz instability
; magnetopause
; meteorology
; polar meteorology
; rainfall
; satellite imagery
; solar wind
; spatial variation
; wind velocity
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| 英文摘要: | We present two distinctive spatial structures (~140 and ~1000 km) in the polar rain electron energy fluxes observed by Defense Meteorological Satellite Program satellites. The 16 May 2005 event indicates that sources of the ~1000 km structures were not in the solar wind electrons. Statistical analysis of 239 events shows that the ~1000 km structures were associated with high solar wind speed and density while the ~140 km structures did not depend on solar wind conditions. The structures are about 5 and 0.7 RE when mapped to the magnetopause and comparable to the typical Kelvin-Helmholtz (KH) wavelengths (3-14 RE) and flux transfer event (FTE) sizes (~0.6-1.3 R E) on the magnetopause. Our calculations indicate that the KH waves are unstable under the high solar wind speed and density. The observations and calculations suggest that the ~1000 km and ~140 km structures are likely caused by the KH waves and FTE on the magnetopause. Key Points Two distinctive spatial structures (~140 and ~1000 km) in the polar rain Dependence of the ~1000 km structures on high solar wind speed and density KH waves and FTE cause the ~1000 and ~140 km structures in the polar rain ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887061791&doi=10.1002%2f2013GL058245&partnerID=40&md5=8a796547cf11f6d31020a26dc19eaf54
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5680
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723, United States
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| Recommended Citation: | |
Zhang Y.,Paxton L.,Kil H.. Large-scale structures in the Polar Rain[J]. Geophysical Research Letters,2013-01-01,40(21).
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