黄土高原植被变化对环境影响的数值模拟  

Numerical Simulation of Effect of Vegetation Changes of Loess Plateau on Environment

作　　者：梁玲[1] 吕世华[1] 柳媛普[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《高原气象》2006年第4期575-582,共8页Plateau Meteorology

基　　金：国家自然科学重点基金项目(40233035);中国科学院方向性创新项目(KZCX3-SW-329);中国科学院寒区旱区环境与工程研究所创新项目(CX210036)共同资助

摘　　要：使用美国NCAR新版MM5非静力平衡模式，模拟了黄土高原2003年6月26～30目的一次降水过程。该试验是通过改变黄土高原局部地区植被覆盖情况，对比分析植被改变区域内各气象要素的变化情况。结果表明：植被改善能使雨量增加，径流量减小，湿度增大，温度日较差减小，使气候变的温和。植被退化却使雨量减少。径流加大，易使水土流失，对水土保持不利。试验较全面地揭示了非均匀地表大气边界层内的温、湿场与陆面相互作用的机理。To show the impact of vegetation changes over Loess Plateau on the environment three experiments with the real, the improved and the degradation vegetation over the Loess Plateau respectively, have been desighed and run, using the new nonhydrostatic atmospheric mesoscale model MM5 of National Center of Atmospheric Research （NCAR）, a precipitation process of Loess Plateau from 26 to 30 June in 2003 is simulated. The impact of vegetation changes over loess Plateau on precipitation with a control experiment and two sensitivity numerical experiments. The results show that the improved vegetation can increase precipitation moisture, reduce runoff and diural change of air temperature, but vice versa for the degradation vegetation. The test comprehensively reveals the physical mechanism of the interaction between land surface and temperature, humidity in atmospheric boundary layer of heterogeneous ground surface.

关 键 词：黄土高原 植被覆盖变化 边界层 

分 类 号：P461.3[天文地球—大气科学及气象学]