DOI: 10.1002/2017JA024683
Scopus记录号: 2-s2.0-85040865263
论文题名: Effects of High-Latitude Forcing Uncertainty on the Low-Latitude and Midlatitude Ionosphere
作者: Pedatella N.M. ; Lu G. ; Richmond A.D.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 862
结束页码: 882
语种: 英语
英文关键词: geomagnetic storm
; high-latitude forcing uncertainty
; ionosphere
英文摘要: Ensemble simulations are performed using the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIE-GCM) in order to understand the role of high-latitude forcing uncertainty on the low-latitude and midlatitude ionosphere response to the April 2010 geomagnetic storm. The ensemble is generated by perturbing either the high-latitude electric potential or auroral energy flux in the assimilative mapping for ionosphere electrodynamics (AMIE). Simulations with perturbed high-latitude electric potential result in substantial intraensemble variability in the low-latitude and midlatitude ionosphere response to the geomagnetic storm, and the ensemble standard deviation for the change in NmF2 reaches 50–100% of the mean change. Such large intraensemble variability is not seen when perturbing the auroral energy flux. In this case, the effects of the forcing uncertainty are primarily confined to high latitudes. We therefore conclude that the specification of high-latitude electric fields is an important source of uncertainty when modeling the low-latitude and midlatitude ionosphere response to a geomagnetic storm. A multiple linear regression analysis of the results indicates that uncertainty in the storm time changes in the equatorial electric fields, neutral winds, and neutral composition can all contribute to the uncertainty in the ionosphere electron density. The results of the present study provide insight into the possible uncertainty in simulations of the low-latitude and midlatitude ionosphere response to geomagnetic storms due to imperfect knowledge of the high-latitude forcing. ©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/114761
Appears in Collections: 气候减缓与适应
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作者单位: High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; COSMIC Program Office, University Corporation for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Pedatella N.M.,Lu G.,Richmond A.D.. Effects of High-Latitude Forcing Uncertainty on the Low-Latitude and Midlatitude Ionosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)