JpGU-AGU Joint Meeting 2020

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

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Yue Deng(University of Texas at Arlington), Loren Chang(Institute of Space Science, National Central University)

[PEM12-P07] Monte Carlo simulation of solar EUV scattering by oxygen ions

*Shin ya Nakano1, Yuta Hozumi2, Akinori Saito3 (1.The Institute of Statistical Mathematics, 2.University of Electro-Communications, 3.Department of Geophysics, Graduate School of Science, Kyoto University)

Keywords:Oxygen ion, Extreme Ultraviolet

It has been reported that the Extreme ultraviolet (EUV) at 83.4 nm, which is scattered by oxygen ions (O+), was observed by an imager of ISS-IMAP in the umbra of the Earth. However, the single scattering of solar radiation in the upper atmosphere would not well explain the observation. This study modeled the EUV scattering by a Monte Carlo method. This method allows us to consider multiple scattering. The result suggests the EUV at 83.4 nm is observable even in the umbra. However, the feature of the observation by ISS-IMAP is not necessarily reproduced. Possible reasons of the discrepancy between the simulation and the observation will be discussed.