【摘要】 使用美国 Ｎ Ｃ Ａ Ｒ 区域气候模式 Ｒｅｇ Ｃ Ｍ２ 研究了西北植被覆盖面积变化对我国区域气候变化的影响。共设计了三组试验，即西北植被面积扩大试验（ Ａ） 、控制试验（ Ｂ） 和植被面积缩小试验（ Ｃ） 。通过对比分析发现，西北植被扩展和退化都能影响地表温度、高度场和流场、我国夏季风的强度以及季风降水的分布，还能影响到土壤湿度和径流量。植被扩展，季风加强，有利于高原及我国北方地区降水增强。植被退化，荒漠化加剧，季风减弱，则使北方地区降水减少。更多还原

【Abstract】 The NCAR RegCM2 regional climate model has been used to study the influence of Northwest China(NW China) afforestation on regional climate in China. Two sensitivity experiments are set up. One is afforestation and other is the experiment with less vegetation. It found that afforestation and disaster can effect land surface temperature and summer monsoon. In the more vegetation experiment in the NW China, the summer monsoon in east China will strengthen and rainfall to the north of Yangtze River will increase as well. But in the experiment with less vegetation in NW China, the summer monsoon in east China will weaken and the precipitation to the north of Yangtze River will decrease.更多还原