摘要
冬季冷空气爆发进入暖海面时,海面边界层属与典型的对流边界层。此情况下,一般而言梯度输送理论(即一阶K闭合方法)是无能为力的。Wgnsaard(1984)提出了被动保守标量场的底直向上(bottom-up)和顶直向下(top-down)湍流交换模型。本文将它推广应用到风场相温度场,并用它模拟了冷气团入海期间海面边界层的结构。与实测资料比较,两者能吻合较好。
The atmospheric boundary layer over ocean is a typical convective bounday layer, when the cold airmass outbreaks flow over the the warmer sea surface in winter. In general, it is impossible to study this processes by using the gradient transport theory ( i. e. one-oder K closing method). The top-down and bottom-up turbulent exchange pattern of a scalar have been suggested by Wyngaard ( 1984 ) . This paper extends it to the wind and tempareture fields. And the characteristics of the atmospheric boundary layer over sea during the cold air outbreaks have been simalated. The modeling results compared with the observed data. Both are identical.
出处
《气象科学》
CSCD
北大核心
1992年第1期85-92,共8页
Journal of the Meteorological Sciences
基金
国家自然科学基金
