植被变化对辽西夏季气候影响的数值试验

Numerical Experiments on the Influences of Vegetation Changes on Summer Climate in the West of Liaoning Province

利用2001年6、7、8月份的资料及中尺度模式MM5V3.5对当年夏季辽西生态脆弱区进行了气候模拟性能试验,模拟出植被退化和恢复后辽西地区的温度变化。试验结果表明:在辽西部分地区植被退化后,当地夏季平均温度明显升高;在部分地区植被恢复后,当地夏季平均温度降低;在下垫面状况改变的周边地区,平均温度有一定程度的变化。同时,植被状况的改变对高空气压场和温度场也产生一定影响。

Making use of the data of June,July and August 2001 and the mesoscale model-MM5V3.5,the capability experiments of summer climate simulation aiming at the eologically vulnerable areas in the west of Liaoning are performed in this paper,and this changes of summer mean tempreture due to the degeneration and resuming of vegetation are simulated.Results show that after the degeneration of vegetation in some areas in the west of Liaoning,the summer average temperature obviously increases while the summer average temperature drops due to the local resuming of vegetation.In the areas around the vegetation change regions,the summer average temperature also alters to some degree.At the same time,the vegetation change affects the temperature and pressure fields aloft.