平均风向的计算方法及其比较  

THE CALCULATION ALGORITHMS FOR AVERAGE WIND DIRECTION AND THEIR COMPARISON

作　　者：邱传涛[1] 李丁华[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》1997年第1期94-98,共5页Plateau Meteorology

摘　　要：常用的平均风向４种计算方法分别是算术平均法、标量平均法、单位矢量法和矢量法，利用实测资料对各种方法的计算结果进行比较，结果表明：算术平均法加大了偏南风的比重；标量平均法在风向变化３６０°时有可能出现较大的误差，在应用时须加以注意；单位矢量法与矢量法的结果比较一致，且不需风速的同期观测资料。In this paper,four calculation algorithms for average wind direction and their comparison are given,these algorithms include arithmetic,scalar,unit vector and vector. The comparison of the results from these algorithms using the observation data was also made. Results are as follows: the results of arithmetic algorithm enlarge the percentage of south wind,the results of scalar algorithm cause a larger error when wind direction rotation cxceeds 360°. The unit vector has similar results with vector,and does not need wind speed. The unit vector is the best.

关 键 词：平均风向 计算法 风 

分 类 号：P425[天文地球—大气科学及气象学]