摘要
根据半地转大气边界层模式,由大尺度数值模式并考虑了下垫面地形及粗糙度的水平非均匀性及大尺度气压场的时空变化,给出了一个诊断边界层风的数值模式。对低纬度运用塔层风模式进行诊断。诊断结果与实测资料比较,风向风速均达到了一定的精确度。
Based on semi-geostrophic PBL model and large-scale model,a diagnostic model to calculateboundary layer wind is introduced.The horizontal inhomogeneities of terrain and the roughness ofground,the temporal and spatial variations of large-scale pressure field are included in this model.A terrain coordinate transformation is introduced to compute the horizontal gradient of thegeostrophic winds.The tower layer wind model is used to diagnose the boundary layer wind in-stead of the semi-geostrophic model for the lower latitude.The comparison with the ob(?)ervationaldata shows that the diagnosis has attained a fairly high level accuracy for both wind direction andwind speed.Therefore,it can be used in practice to diagnose or forecast the PBL wind when large-scale model is incorporated.
出处
《应用气象学报》
CSCD
北大核心
1993年第1期58-64,共7页
Journal of Applied Meteorological Science
基金
国家自然科学基金
关键词
地形
边界层
风
数值模式
The PBL wind
Diagnostic numerical model
Real terrain
Semi-geostrophic
Tower layer
