【摘要】 地气相互作用现象的研究对预测未来气候变化意义重大。黑河地区绿洲和沙漠戈壁地表间水热特性的强烈差异所引发的绿洲—沙漠中尺度环流 ,能够影响该区绿洲生态系统的维持和发展。利用中尺度数值模式RAMS成功地再现了黑河地区绿洲—沙漠环流 ,同时对环流出现时温、湿场的模拟分析表明 ,绿洲—沙漠环流的发生和发展直接依赖于非均匀下垫面热力场的差异 ,白天发展强盛 ,夜间作用小。环流作用能够保证绿洲—沙漠系统的物质和能量平衡 ,对沙漠戈壁环境中绿洲的维持十分重要更多还原

【Abstract】 It is very important to study the interaction of land surface and atmosphere for predictingthe futureclimatic change. The oasis-desert mesoscale circulationin the Heihe area, which deduced by the strong hydrological and thermodynamicdistinction between oasis and desert/Gobi, has much effecton the exist and developmentof oasis ecosystem. In this paper, RAMS is utilized to successfully reproducethe oasis-desert circulation in theHeihe area. At thesame time, the numerical simulations of the field of air temperature and specific humidity indicate that the oasis-desert circulation is directly dependent on the thermodynamic discrepancy of heterogeneous land surface. It is strong in daytime and disappearsat night. The circulation is so important for the maintaining of oasis ecosystem because the mass and energy balancecan be kept.更多还原