火星表面热辐射环境模拟

为了对火星表面的热辐射环境进行模拟,以辅助火星探测等任务,建立了火星大气的一维模型和土壤的一维导热模型,并与NASA的一维火星大气辐射程序相结合,得到了一套整体模拟系统。模拟获得了火星地表温度及接收到的可见光、红外辐射热流密度,分析了季节、纬度、尘暴、云层的变化对地表温度和所受太阳辐射造成的影响。模拟结果表明,纬度和季节的变化影响着太阳高度角和日照时长等因素,进而对可见光辐射造成显著影响;尘埃光学厚度的增加会削弱可见光辐射并增强红外辐射,云层光学性质的改变造成的影响与之相似但较小;四者的改变都会对地表的温度及接收到的太阳辐射热流密度造成不同程度的影响。

Simulation on Thermal Radiation Environment on Surface of Mars

To simulate the thermal radiation environment on the surface of Mars, and assist missions such as Mars exploration, a one-dimensional model of the Martian atmosphere and a one-dimensional heat conduction model of the soil are established in this paper. Combined with NASA’s one-dimensional Mars atmospheric radiation code, a comprehensive simulation system is obtained. The surface temperature of Mars and the received heat flux of visible and infrared radiation are obtained through simulation, and the effects of season, latitude, dust storm and clouds are analyzed. The results show that the changes in latitude and season affect the factors such as the solar elevation angle and the sunlight duration, thus significantly affecting the visible radiation; the increase in the dust optical depth weakens the visible radiation and enhances the infrared radiation, while the effects of the cloud optical depth are similar but smaller; and the changes in these four factors all cause different degrees of influence on the surface temperature and the received solar radiation heat flux.