摘要
本文对Mass,C.F.等的一层边界层原始方程诊断模式进行了适当修改,用于诊断大、中尺度地形对近地面风场的动力影响。结果表明:(1)它可用来诊断地形对地面气流的动力影响,具有计算量小和一定的模拟能力;(2)1月地面在高原东北侧陕甘宁地区形成反气旋环流中心和从高原北部35°N经高原东部边缘到高原东南角附近地面形成风向辐合线,可能主要受高原的动力影响所致。(3)由于祁连山对1月西风气流的影响,在它的附近形成中尺度气候系统。这些情况与资料分析结果比较一致。
In this paper a diagnostic study of effect of orography on largeand medium-scale on the near surface wind have been made by using a one-level mesoscale model with some modifications. The main results are: (1) the model can be used to diagnose the orographic dynamic effects on the surface winds and has economic computation cost and quite good ability of simulation; (2) in January an anticyclonic center forms in the region of Shanxi, Gansu and Ningxia to the northeast side of Tibetan Plateau and a convergent zone extends eastwards along 35°N in north part of Plateau and through the northeast edge of the Plateau and then goes southwards to the southeast corner of the Plateau, which may be caused by the dynamic effect of Plateau orography; (3) owing to the effect of Qilian Mountain on the west flow in January, there are some climatic systems of medium-scale formed over the mountain and its neighbourhood. All the above results are in correspondence with observation data.
出处
《高原气象》
CSCD
北大核心
1989年第2期156-166,共11页
Plateau Meteorology
关键词
地形
流场
数值模拟
近地面层
Orographic effect
Flow field near surface
Numerical simulation
