摘要
利用甘肃省河西地区17个风塔观测资料和风向风速标准差法,计算了风塔处的下垫面粗糙度,并与中尺度数值模式ARPS中使用的粗糙度参数进行了比较分析。结果表明,数值模式中使用的粗糙度值和实况具有一定差异,其使用的粗糙度定义方案并不能准确地反映出下垫面粗糙度和非均一性特征。差异最大出现在草原下垫面上,可达375%,且差异程度随下垫面植被复杂程度增加。
The data from 17 wind towers in Gansu corridor have been utilized to calculate the underlying surface roughness near these wind towers, which have been compared with the roughness used in mesoscale numerical models. The results show that there are some differences between both of them, and the definition in the models can not accurately reflect the roughness and nonuniformity of real underlying surface. The difference between them increases with the vegetation complex degree of underlying surface, and peaks in grassland region, which can reach 375%.
出处
《高原气象》
CSCD
北大核心
2010年第1期51-55,共5页
Plateau Meteorology
基金
国家科技基础性工作专项资金项目(2007DKA31700-06-16)
国家重点基础研究发展计划项目(2009CB421402)
甘肃省自然科学基金项目(0710RJZA040)资助
关键词
粗糙长度
数值模式
实时资料
差异性分析
Roughness length
Numerical model
Real-time data
Variance analysis
作者简介
作者简介：胡文超（1967-），男，河北唐县人，高工，主要从事气象信息技术应用研究．E—mail：often．hu@163．com.
