渤海近海风场的一种近似推算模式

本文给出了一种利用陆地站测风推算近海风场的模式,并与实测资料进行了比较。使用塘沽站代表沿岸陆地站,渤海7号观测平台代表近海站。 对于所给出的近似模式,我们采用分两步逼近的作法。首先,以Hsu(1981)的动力推算模式为基值;其次,用最小二乘法模拟出不同季节、风向下由于海陆下垫面热力性质差异风速订正值。最后,基值与热力订正值的叠加而得到总推算值。结果表明,推算总值与实测值的比较有相当好的吻合,较单一的动力推算值有较大的改进。在海上经常缺乏资料的情况下,本文给出的推算模式具有一定的实际意义。

AN APPROXIMATE MODEL FOR ESTIMATING OFFSHORE WINDS OF THE BOHAI

Selecting Tanggu station as an onshore station represents onshore and platform as an offshore station.An approximate model for estimating offshore winds from onshore meteorological measurements have been developed and verified by available data sets.We adopted three steps to approach this approximate model.First,by using the Hsu's dynamic model we get the basic value.Next,using the least square method to determine the correction of the wind velocity by considering under the thermal contrast of the land and sea.Finaly,by additing the basic value and the correction value we get the total estimating value.The result shows that the total estimating values fit well with the observed data.