Wind profiles in and above a forest canopy
Wind profiles in and above a forest canopy
复制标题
森林树冠内部和上方的风廓线
DOI：
10.1002/qj.49709741414
复制
发表时间：
1971
影响因子：
8.9
通讯作者：
H. Oliver
中科院分区：
文献类型：
--
作者：
H. Oliver
使用在线计算机，测量了松林及其上方的风速，并在广泛的稳定条件下获得了准确的潜在温度分布。结果表明，在Richardson数约为-0.05和+0.10之间，林冠上方的风廓线服从纯对数形式，测得的粗糙度长度分别从0.75 m线性增加到1.23 m。在这一稳定范围之外，可拟合出对数线性剖面。确定了树冠内的风廓线形状，并注意到树干空间内的风速增加。
还描述了确定风速计塔架结构对风速读数影响的初步实验。
Using an on-line computer, measurements were made of wind speeds in and above a pine forest together with accurate potential temperature profiles over a wide range of stability conditions. It was found that between values of Richardson number of approximately –0.05 and +0.10 the wind profile above the canopy followed a pure log form with the measured roughness length increasing linearly from 0.75 to 1.23 m respectively. Outside this stability range a log-linear profile could be fitted. The shape of the wind profile within the canopy was determined, and an increase of wind speed within the trunk space was noted.
A preliminary experiment to determine the effect of the anemometer tower structure upon wind speed readings is also described.