Ionospheric responses to the 21 August 2017 solar eclipse by using data assimilation approach

Chia-Hung Chen, Charles Lin, Tomoko Matsuo

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

Using the physics-based thermosphere-ionosphere model (NCAR-TIEGCM) with an ensemble Kalman filter, this study reports the first data assimilative analysis of the ionosphere responses to the solar eclipse on 21 August 2017. The system, using a 2-min assimilation cycle of data from ground-based GNSS observations, show dynamic variations of the equatorial ionization anomaly (EIA) due to the electrodynamic effects of the solar eclipse. Two major ionospheric responses are captured: (1) an early appearance of EIA at the westward boundary of moon shadow and (2) an enhanced EIA at lower latitudes and suppressed EIA at the higher latitudes. These eclipse-induced conjugate EIA variations are produced by an eastward electric field perturbation around the magnetic equator and a westward electric field perturbation at the higher latitudes. [Figure not available: see fulltext.].

原文English
文章編號13
期刊Progress in Earth and Planetary Science
6
發行號1
DOIs
出版狀態Published - 2019 12月 1

All Science Journal Classification (ASJC) codes

  • 一般地球與行星科學

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