Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM18] Physics and Chemistry in the Atmosphere and Ionosphere

Tue. May 22, 2018 3:30 PM - 5:00 PM 304 (3F International Conference Hall, Makuhari Messe)

convener:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Takuya Tsugawa(National Institute of Information and Communications Technology), Seiji Kawamura(国立研究開発法人 情報通信研究機構), Chairperson:Takahashi Toru(極地研究所), Tao Chihiro

4:15 PM - 4:30 PM

[PEM18-10] The disturbed-time ionospheric modeling by coupled thermosphere-ionosphere data assimilation system

*Chia-Hung Chen1, Charles Lin1, Tomoko Matsuo2 (1.Department of Earth Sciences, National Cheng Kung University, 2.Ann and H. J. Smead Department of Aerospace Engineering Sciences, University of Colorado at Boulder, CO)

Keywords:ionospheric data assimilation model, ionospheric responses on the solar eclipse, ionospheric forecasting during geomagnetic storm

Data assimilation system is a powerful tool to modeling the ionosphere during quiet and disturbed conditions in more realizations. Recently, we have developed a coupled thermosphere-ionosphere data assimilation system and discussed its capability in the ionospheric forecasting and the scientific issues in the ionosphere. In the first of this presentation, I will introduce the data assimilation system developed in this study by assimilating total electron content (TEC) into a coupled thermosphere-ionosphere model. Then I will show the capability of this system on the geomagnetic storm-time ionospheric forecasting, evening eastward pre-reversal enhancement (PRE) electric field, and the neutral atmosphere adjustments (neutral winds, neutral temperatures, and neutral compositions) during 21 August 2017 solar eclipse event.