Japan Geoscience Union Meeting 2016

Presentation information

International Session (Oral)

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

[P-EM04] Space Weather, Space Climate, and VarSITI

Mon. May 23, 2016 9:00 AM - 10:30 AM 103 (1F)

Convener:*Ryuho Kataoka(National Institute of Polar Research), Antti Pulkkinen(NASA GSFC), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Toshifumi Shimizu(Institute of Space and Astronautical Science, JAXA), Ayumi Asai(Unit for Synergetic Studies of Space, Kyoto University), Hidekatsu Jin(National Institude of Information and Communications Technology), Tatsuhiko Sato(Japan Atomic Energy Agency), Kanya Kusano(Institute for Space-Earth Environmental Research, Nagoya University), Hiroko Miyahara(College of Art and Design, Musashino Art University), Kiminori Itoh(Graduate School of Engineering, Yokohama National University), Kazuo Shiokawa(Institute for Space-Earth Environmental Research, Nagoya University), Takuji Nakamura(National Institute of Polar Research), Shigeo Yoden(Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University), Kiyoshi Ichimoto(Kwasan and Hida Observatories, Kyoto University), Mamoru Ishii(National Institute of Information and Communications Technology), Chair:Ryuho Kataoka(National Institute of Polar Research)

10:00 AM - 10:15 AM

[PEM04-26] Development of a whole atmosphere-ionosphere model GAIA for higher accuracy and its application toward data assimilation modeling

*Hidekatsu Jin1, Yasunobu Miyoshi2, Hitoshi Fujiwara3, Hiroyuki Shinagawa1, Chihiro Tao1 (1.National Institude of Information and Communications Technology, 2.Kyushu University, 3.Seikei University)

Keywords:ionosphere, thermosphere, simulation, modeling, data assimilation

The origins of upper atmospheric variations do not only come from the solar activities and rotation, but also from the Earth’s lower atmosphere. In order to now-cast and forecast the upper atmospheric disturbances and variations, we have developed a whole atmosphere-ionosphere coupled model called GAIA. The model incorporates the Japanese meteorological reanalysis (JRA) into its lower atmospheric part as well as the daily F10.7 index, in order to reproduce the effects of realistic forcing both from the lower atmosphere and solar irradiance. We have validated the model through the comparison of its long-term run with observations of ionosphere and ionosphere, and found out that further development of the model is necessary for higher accuracy.
In this talk, we will show the results from several updates of the model, such as improvement of ionospheric dynamics and energetics, and increase of model resolution. We have developed the interface of GAIA to data assimilation system and will show future plan.