DOI: 10.1002/grl.50815
论文题名: Variations in cutoff latitude during the January 2012 solar proton event and implication for the distribution of particle energy deposition
作者: Nesse Tyssøy H. ; Stadsnes J. ; Søraas F. ; Sørbø M.
刊名: Geophysical Research Letters
ISSN: 0094-8645
EISSN: 1944-8376
出版年: 2013
卷: 40, 期: 16 起始页码: 4149
结束页码: 4153
语种: 英语
英文关键词: particle energy deposition
; solar proton event
Scopus关键词: Asymmetric energy
; Distribution of particles
; Energy depositions
; Middle atmosphere
; Particle energy
; Polar-orbiting
; Solar proton events
; Time interval
; Atmospheric chemistry
; Deposition
; Geomagnetism
; Geostationary satellites
; Protons
; atmospheric chemistry
; atmospheric dynamics
; energy flux
; geomagnetic field
; GOES
; latitude
; MetOp-A
; middle atmosphere
; POES
; solar activity
英文摘要: Protons in the energy range 1-20 MeV deposit most of their energy in the middle atmosphere (60-100 km). Knowledge of their magnetic latitudinal and local time distribution is crucial for determining their effect on the chemistry and dynamics in the atmosphere. Using POES 16-19 and METOP02 satellites, we investigate the latitudinal cutoff boundaries and the energy deposition during the January 2012 solar proton event. The dayside cutoff latitudes show high correlation with the Dst index even when Dst turns positive, leading to an abrupt poleward movement of more than 5°. In the same time interval, the nightside cutoff latitudes move equatorward resulting in vastly asymmetric energy deposition into the atmosphere on the dayside and nightside. The differences are sustained for almost a day in the middle atmosphere at 65° corrected geomagnetic latitude. These features cannot be taken into account by applying the frequently used GOES particle data. Key Points Distribution of solar protons in latitude and local time during the Jan 2012 SPE Strong day-night asymmetries in the proton energy deposition into the atmosphere One can map SPEs using polar orbiting POES, but not the geostationary GOES data. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882414042&doi=10.1002%2fgrl.50815&partnerID=40&md5=6ab67cd17fb8a69d55027578ff12e49a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5909
Appears in Collections: 气候减缓与适应
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作者单位: Birkeland Centre for Space Science, Box 7803, Bergen, NO-5020, Norway
Recommended Citation:
Nesse Tyssøy H.,Stadsnes J.,Søraas F.,et al. Variations in cutoff latitude during the January 2012 solar proton event and implication for the distribution of particle energy deposition[J]. Geophysical Research Letters,2013-01-01,40(16).