黑河地区地面阻曳系数的估算及其影响的数值试验  

ESTIMATION OF SURFACE DRAG COEFFICIENTS IN HEIHE REGION AND NUMERICAL EXPERIMENTS OF THEIR INFLUENCES

作　　者：张立盛[1] 钱正安[1] 陈伯民[1] 

机构地区：[1]中国科学院兰州高原大气物理研究所

出　　处：《高原气象》1994年第3期257-265,共9页Plateau Meteorology

摘　　要：本文利用黑河地区在气相互作用观测试验期间戈壁１２天、沙漠６天逐时塔站观测资料以及胡隐樵等的组合法所获得的感热、摩擦速度等，用倒算法估算了黑河地区地面通量的阻曳系数值，最后根据所估算的阻曳系数值，进行了边界层过程对短期天气预报影响的数值试验。结果表明，黑河地区的阻曳系数存在较明显的日变化；所获得的黑河地区戈壁及沙漠下垫面的日平均阻曳系数估算值大体是合理的；In this paper,firstly based on the hourly surface tower-stat observation data of Gobi and Desert covering 12-,6-days respectively during the period of the Field Experiment on land-air interaction in Heihe region (HEIFE),and the results of sensible heat and friction velocity got by Hu′s, the dtag coefficients of surface fluces in Heihe region are estimtaed by using inversion-calcuation method.Then the numerical expriments about the influences of boundary proesses on short-range weather prdiction have been carried out. The rsults show:the drag coefficients in Heihe region have a obvious daily variation;the daily mean values of drag coefficients estimated in Gobi and Desert underlying surface in Heihe region are fundamentally reasonable;except for over certain especially sensitive or prevailed local influence region,the boundary processes only have a little influencees on the short-range westher presses.

关 键 词：阻曳系数 边界层过程 黑河实验区 

分 类 号：P404[天文地球—大气科学及气象学]