高解像度火星大気大循環モデルで表現されるダスト巻き上げ過程(宇宙・惑星(1),一般講演)

概要

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In order to investigate the effects of small and medium scale atmospheric circulation and disturbances on dust lifting process on Mars, the high resolution simulations of the Martian atmosphere are performed by using a Mars general circulation model. The simulations with horizontal resolutions of 89, 44, and 22km show that the dust lifting amount increases with increasing resolution. The increase of dust lifting amount is mainly caused by the lifting around several regions with characteristic orographic features, such as the Valles Marineris and the Hellas basin. The analysis of dust lifting phenomena in the Valles Marineris region shows that the superposition of local slope wind and the return flow of meridional circulation causes the large dust lifting in the region. This implies that the effects of small and medium scale local orographic circulation play an important role in lifting dust on Mars.
日本流体力学会の論文
2008-09-04