Prediction of the thermospheric and ionospheric responses to the 21 June 2020 annular solar eclipse

作     者：Tong Dang JiuHou Lei WenBin Wang MaoDong Yan DeXin Ren FuQing Huang 

作者机构：Chinese Academy of Sciences Key Laboratory of Geospace EnvironmentSchool of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical ObservatoryUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences Center for Excellence in Comparative PlanetologyUniversity of Science and Technology of ChinaHefei 230026China High Altitude ObservatoryNational Center for Atmospheric ResearchBoulderCOUSA 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2020年第4卷第3期

页      面：231-237页

核心收录：

学科分类：07[理学] 070402[理学-天体测量与天体力学] 0703[理学-化学] 0704[理学-天文学] 

基　　金：supported by the B-type Strategic Priority Program of the Chinese Academy of Sciences (XDB41000000) the National Natural Science Foundation of China (41831070, 41974181) the Open Research Project of Large Research Infrastructures of the Chinese Academy of Sciences, “Study of the interaction between low- and mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project.” supported by the National Natural Science Foundation of China (41904138) the National Postdoctoral Program for Innovative Talents (BX20180286) the China Postdoctoral Science Foundation (2018M642525) the Fundamental Research Funds for the Central Universities The National Center for Atmospheric Research is sponsored by the National Science Foundation 

主　　题：solar eclipse ionosphere thermosphere coupling equatorial ionization anomaly model simulation 

摘      要：On 21 June 2020,an annular solar eclipse will traverse the low latitudes from Africa to Southeast *** highest latitude of the maximum eclipse obscuration is approximately 30°.This low-latitude solar eclipse provides a unique and unprecedented opportunity to explore the impact of the eclipse on the low-latitude ionosphere–thermosphere(I–T)system,especially in the equatorial ionization anomaly *** this study,we describe a quantitative prediction of the impact of this upcoming solar eclipse on the I–T system by using Thermosphere–Ionosphere–Electrodynamics General Circulation Model simulations.A prominent total electron content(TEC)enhancement of around 2 TEC units occurs in the equatorial ionization anomaly region even when this region is still in the shadow of the *** TEC enhancement lasts for nearly 4.5 hours,long after the solar eclipse has *** model control simulations indicate that the TEC increase is mainly caused by the eclipse-induced transequatorial plasma transport associated with northward neutral wind perturbations,which result from eclipse-induced pressure gradient *** results illustrate that the effect of the solar eclipse on the I–T system is not transient and linear but should be considered a dynamically and energetically coupled system.