Study on small and medium scale disturbances and dust storm on Mars by using a high resolution Mars atmosphere general circulation model

为了研究火星大气中对扬尘起重要作用的中小尺度扰动特征，对火星大气进行了相当高分辨率的数值模拟。模拟的水平网格大小在90 ~ 11 km之间。模拟结果显示了不同水平尺度下的多种大气扰动。此外，研究结果还表明，这种小尺度扰动对扬尘有显著的促进作用。这些结果表明，了解这些扰动的特征对于考虑当前火星气候的维持机制是必要的。

In order to investigate features of small and medium scale disturbances in the Martian atmosphere, which would play important roles to lift dust, numerical simulations of Martian atmosphere with quite high resolutions are performed. The horizontal grid sizes of simulations ranges from about 90 to 11 km. Simulation results show many kinds of atmospheric disturbances with various horizontal scales. Further, the results show that such small scale disturbances contribute dust lifting significantly. These results imply that the understanding of features of such disturbances is necessary to consider maintenance mechanisms of current Martian climate.