Wind profiles and change of terrain roughness at Risø
Wind profiles and change of terrain roughness at Risø
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DOI：
10.1002/qj.49709841811
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发表时间：
1972-10
影响因子：
8.9
通讯作者：
H. Panofsky;E. Petersen
中科院分区：
文献类型：
--
作者：
H. Panofsky;E. Petersen
Riso 125米高的塔楼坐落在一个狭窄的半岛上，周围是不同宽度的海湾。由此产生的表面粗糙度的变化清楚地反映了'扭结'在测得的风廓线，其特征取决于风向。水-陆弹道的最低扭结高度与理论符合得很好。计算的塔周围的粗糙度长度随风向变化的方式与地形特征一致。然而，粗糙度长度的水估计的配置文件是不切实际的小。当轨迹经过相对均匀的地形时，所获得的平均廓线可以很好地用通常只适用于近地层的风廓线表达式来表示。
The Riso 125 m tower is situated on a narrow peninsula, surrounded by bays of varying width. The resulting surface roughness changes are clearly reflected by ‘kinks’ in the measured wind profiles, whose characteristics depend on the wind direction. The height of the lowest kink for water-to-land trajectories is in good agreement with theory. The roughness lengths computed for the immediate surrounding of the tower vary with wind direction in a manner consistent with terrain features. However, the roughness lengths of the water estimated from the profiles are unrealistically small. The mean profiles obtained when the trajectory passes over relatively homogeneous terrain are represented quite well by wind profile expressions that are usually applied only in the surface layer.