Characteristic Analysis of NearSurface Boundary Layer Wind Profile over Northern Coastal Zhejiang Seas
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Abstract:
Based on the meteorological observations from December 2010 to May 2014 of the 370 m observation tower on the Liangmaoshan Island of Ningbo and the automatic weather stations along the northern coastal Zhejiang province, an analysis is made of the wind profile characteristics in the nearsurface boundary layer in different prevailing winds and different wind forces. Results show that wind speed at the tower base was stronger than that of the next upper layer in north or south wind because of topography. The wind profiles were different under different weather patterns, which basically meets the logarithm law at layers below 320 m when wind is from south, but when the tower was affected by TCs or the winds from north, the profile could be separated into 3 layers: within the constant flux layer, the winds meets basically the logarithm law; at the next layer above, there exists usually a layer with hardly changing velocity because of TCs, and there is slight decreasing in north winds; at the upper layers, winds increase. The threelayer structure is more obviously while north winds prevailing than TCs affecting, with the maximum velocity at about 80 to 109 m and the minimum at 200 to 250 m. Within the layers with the wind profile following the logarithm law, the fitting goodness of weak wind profiles is better than that of strong winds. Investigation on the profile of AWS observations indicates a consistent performance.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.