摘要
在NCAR的CCM3全球模式与RegCM2区域气候模式的基础上,发展了一个CCM3—RegCM2嵌套模式系统,并应用于研究改变青藏高原中西部地区下垫面特征对东亚地区大气环流季节转换的影响。结果表明:当青藏高原中西部地区植被遭到破坏,退化为沙漠时,使得该地区地面反照率增加,感热输送加强,气温升高,并在西风气流的作用下,30°N以北的东亚大部分地区气温增高,东亚大陆沿海的高度增加。同时,中纬度地区纬向气流减弱,经向气流增强,东亚大槽亦被削弱,整个东亚地区的季节转换将提前。
By employing a modified CCM3\|RegCM2 nested model system which is developed on the basis of NCAR CCM3 and RegCM2, the surface influences of the Midwest area of Qinghai\|Xizang Plateau on the seasonal transition in Eastern Asia were studied. The results show that when the vegetation of the West\|central Plateau is damaged, the mid\|latitude zonal flow and Eastern Asia trough are weaken due to the fact that the temperature of the most part of East Asia to the north of 30°N and height of East Asia coastal belt are strengthened by virtue of surface albedo and temperature of the West\|central Qinghai\|Xizang Plateau increasing, all of these imply that the seasonal transition in Eastern Asia will be somewhat period in advance.
出处
《高原气象》
CSCD
北大核心
2003年第2期179-184,共6页
Plateau Meteorology
