渤海海面风场的一种动力诊断方法
A dynamical diagnosis method on obtaining surface wind field over the Bohai Sea
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摘要: 给出一种动力诊断获取渤海海面风场的简便方法.首先建立一个简单的水平二维地面风场诊断模式,根据由微机支持的数字化仪输入的地面格点气压场,诊断出地面风场;然后利用渤海沿岸和岛屿海洋观测站(含石油平台站)实测风资料,运用简单的资料同化方法(张驰逼近方法)对诊断风场进行调整,从而得到渤海海面风场.结果表明,此方法简便有效.Abstract: A simple dynamical diagnosis method is constructed on obtaining surface wind filed over the Bohai Sea.First,a horizontally two-dimensional dynamical diagnosis model is set up in Cartesian coordinates,which is used to calculate surface wind field based on grid pressure data from weather maps by a computer scanning technique.And then,wind obser vations of ocean observational stations distr ibuted along the Bohai Sea coast including oil plat stations are ingested by a nudging method,which is applied to adjust the already calculated surface wind field repeatedly through integrating the dynamic diagnosis model.The surface wind field over the Bohai Sea can be generated when the model is integ rated up to a steady state.Two cases are presented,and the results show that the dynamical diagnosis method is efficient.
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Key words:
- Bohai Sea /
- sea surface wind field /
- dynamical diagnosis /
- nudging method
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