Bottom and Deep water formation due to the interaction of convective and baroclinic instabilities

为了研究对流不稳定和斜压不稳定的相互作用，用非静力方程组进行了三维模型试验。降温后，斜压流在对流混合层中变得不稳定，不能发展成成对的气旋性和反气旋性涡。反气旋涡旋的性质类似于在极地海洋中经常观察到的亚中尺度相干涡旋(SCV)。与涡旋相关的向下输送随着等轴线的背景斜率增加而增加。需要考虑非绝热过程(对流)的影响，以便更好地将大气环流模式中的涡旋输送参数化。

To investigate the interaction of convective and baroclinic instabilities, 3-D model experiments have been executed using a nonhydrostatic equation system. The baroclinic flow becomes unstable to develop into pairs of cyclonic and anticyclonic eddies in the convective mixed layer after cooling sets on. Properties of anticyclonic eddies resemble those of submesoscale coherent vortices(SCVs) which have been often observed in polar oceans. The downward transport associated with the eddies increases with background slope of isopycnals. It is needed to take into account the effects of diabatic processes(convection) for better parameterization of the eddy transport in a general circulation model.