区域模式和GCM对青藏高原和西北地区气候模拟结果的对比分析  

COMPARISON OF SIMULATED RESULTS OF REGIONAL CLIMATE IN SUMMER OVER QINGHAI-XIZANG PLATEAU AND NORTHWEST CHINA

作　　者：刘黎平[1] 钱永甫[2] 吴爱明[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃省兰州市730000 [2]南京大学大气科学系,江苏省南京市210093

出　　处：《高原气象》2000年第3期313-322,共10页Plateau Meteorology

基　　金：国家自然科学基金项目!4 98750 0 2的资助

摘　　要：使用一个区域模式与大气环流模式 (GCM)嵌套 ,模拟了我国西北及青藏高原地区夏季气候的平均状态。将区域模式与GCM嵌套的模拟结果和GCM单独使用时的模拟结果与观测场进行了对比分析和相关分析。结果表明 :GCM模式模拟出了我国西北和青藏高原地区夏季大尺度气候的基本特征 ,对降水的模拟也基本合理 ,但无法分辨出较小系统。区域模式与GCM嵌套的模拟结果有明显改善 ,它可成功地再现西北及青藏高原地区夏季的区域气候特征 (包括某些中尺度特征 ) ,分辨出了大气环流模式难以详尽描述的高原气候特征 ,对降水的模拟较GCM的模拟结果也有明显的改善。GCM模拟结果与实际的气候场的差异在很大程度上影响了区域模式的模拟结果 ,特别是对模式边缘的影响更明显。With GCM and regional model nesting into GCM the regional climate in summer in Qinghai Xizang Plateau and northwest China was simulated, and the simulated results by two models were compared with observed results. The results showed that GCM could only reproduce the large scale climatic properties but failed in simulating the mesoscale systems. The simulated precipitation amount by GCM is reasonable. The regional model nesting into GCM can distinguished some regional climatic features including mesoscale systems in summer over Qinghai Xizang Plateau. The nesting technique improved the simulation of regional climate in this area. The differences between simulate results by GCM and observed results effects the simulation skill of regional model, especially on the edge of model area.

关 键 词：区域模式 青藏高原 西北地区 GCM 气候模拟 

分 类 号：P468.27[天文地球—大气科学及气象学] P468.24