敦煌干旱区一次降水过程陆面特征模拟  

Simulation of Land-surface Characteristic under Precipitation Condition in Dunhuang Arid Region

作　　者：王胜[1] 张强[1] 卫国安[2] 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《干旱气象》2004年第4期46-50,共5页Journal of Arid Meteorology

基　　金：国家自然科学基金(40175004);兰州干旱气象研究所项目"陆面过程模式对西北干旱区绿洲地表能量的模拟";国家重点基础研究发展规划(G1998040900)共同资助.

摘　　要：利用"我国西北干旱区陆—气相互作用观测试验"在敦煌双墩子戈壁站取得的观测资料及最近的一些研究成果,对陆面模式进行了改进,然后对一次典型较大降水过程的陆面特征及近地层的风、温、湿进行了模拟,结果表明:改进的模式能对降水条件下的干旱区陆面特征进行较好的模拟,其中对辐射、地表温度的模拟相当好,能量的模拟总体结果令人满意;另外由于本模式专门考虑了近地层的影响,所以对近地层的风速、温度和湿度的模拟结果相当好。A land-surface model is improved by using some new research results.Net radiation, surface temperature, sensible heat, latent heat and temperature, specific humidity and wind velocity in ground layer under precipitation condition are simulated by using the data observed at Dunhuang in the “Field Experiment on Interaction between Land and Atmosphere in the Arid Region of Northwest China'.The results show that the model is ameliorated well.The radiation flux and surface temperature simulation are better than energy. The simulation of the temperature, specific humidity and wind speed in ground layer is well because the ground layer is considered alone in this model.

关 键 词：西北干旱区 陆面过程 降水过程 可利用能量 

分 类 号：P458[天文地球—大气科学及气象学]