Simulations of the general circulation of the Martian atmosphere: 1. Polar processes
Simulations of the general circulation of the Martian atmosphere: 1. Polar processes
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DOI：
10.1029/jb095ib02p01447
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发表时间：
1990-02
影响因子：
--
通讯作者：
J. Pollack;R. Haberle;J. Schaeffer;Hilda Lee
中科院分区：
文献类型：
--
作者：
J. Pollack;R. Haberle;J. Schaeffer;Hilda Lee
基于原始气象学方程，利用三维模式对火星大气环流进行了为期50天的数值模拟，其中考虑了大气尘埃对太阳辐射和热辐射的辐射效应。对季节日期和沙尘光学厚度的选择进行了大量的数值试验。结果表明，随着冬季极地沙尘含量的增加，大气中CO2的凝结速率急剧增加。结果表明，观测到的大气沙尘含量的强烈季节变化可能引起一些半球不对称。这些不对称性包括冬季北极地区极地兜帽的盛行，春季北极极冠的低反照率，以及温暖季节北部二氧化碳冰盖的完全消散。
Numerical simulations of the Martian atmosphere general circulation are carried out for 50 simulated days, using a three-dimensional model, based on the primitive equations of meteorology, which incorporated the radiative effects of atmospheric dust on solar and thermal radiation. A large number of numerical experiments were conducted for alternative choices of seasonal date and dust optical depth. It was found that, as the dust content of the winter polar region increased, the rate of atmospheric CO2 condensation increased sharply. It is shown that the strong seasonal variation in the atmospheric dust content observed might cause a number of hemispheric asymmetries. These asymmetries include the greater prevalence of polar hoods in the northern polar region during winter, the lower albedo of the northern polar cap during spring, and the total dissipation of the northern CO2 ice cap during the warmer seasons.