DOI: 10.1029/2018JA025229
Scopus记录号: 2-s2.0-85047633044
论文题名: Derivation of the Energy and Flux Morphology in an Aurora Observed at Midlatitude Using Multispectral Imaging
作者: Aryal S. ; Finn S.C. ; Hewawasam K. ; Maguire R. ; Geddes G. ; Cook T. ; Martel J. ; Baumgardner J.L. ; Chakrabarti S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 5 起始页码: 4257
结束页码: 4271
语种: 英语
英文关键词: aurora
; auroral energy
; ionosphere
; space weather
; thermosphere
英文摘要: Energies and fluxes of precipitating electrons in an aurora over Lowell, MA on 22–23 June 2015 were derived based on simultaneous, high-resolution (≈ 0.02 nm) brightness measurements of N2 + (427.8 nm, blue line), OI (557.7 nm, green line), and OI (630.0 nm, red line) emissions. The electron energies and energy fluxes as a function of time and look direction were derived by nonlinear minimization of model predictions with respect to the measurements. Three different methods were compared; in the first two methods, we constrained the modeled brightnesses and brightness ratios, respectively, with measurements to simultaneously derive energies and fluxes. Then we used a hybrid method where we constrained the individual modeled brightness ratios with measurements to derive energies and then constrained modeled brightnesses with measurements to derive fluxes. Derived energy, assuming Maxwellian distribution, during this storm ranged from 109 to 262 eV and the total energy flux ranged from 0.8 to 2.2 ergs·cm−2·s−1. This approach provides a way to estimate energies and energy fluxes of the precipitating electrons using simultaneous multispectral measurements. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113969
Appears in Collections: 气候减缓与适应
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作者单位: Lowell Center for Space Science and Technology, Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, MA, United States; Center for Space Physics, Boston University, Boston, MA, United States
Recommended Citation:
Aryal S.,Finn S.C.,Hewawasam K.,et al. Derivation of the Energy and Flux Morphology in an Aurora Observed at Midlatitude Using Multispectral Imaging[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)