西北太平洋海洋温度锋生与锋消机制的初步研究

Preliminary study on the frontogenesis and frontolysis of the oceanic temperature front in the northwest Pacific Ocean

海洋锋面区域对气候变化以及海气耦合作用的影响非常显著,通过分析其形成机制,可以帮助进一步了解海洋与大气的相互作用过程以及其物理过程。利用Argo数据、NCEP/NCAR再分析数据和遥感风场数据对西北太平洋的混合层温度与温度锋面的变化机制进行了研究。基于海洋混合层的热量收支模型,发现在北太平洋区域的海洋混合层温度主要受到净热通量控制,同时还存在一个季节变化明显的温度锋面。9-2月为温度锋面加强时期,3-4月温度锋面变化不明显,而5-8月温度锋面则迅速减弱。根据研究,该温度锋面的加强与减弱主要是由于净热通量的南北差异造成的,而在净热通量中则以短波辐射通量与潜热通量为主要影响因子。

The mechanisms of the mixed layer temperature and temperature front in the northwest Pacific Ocean were investigated using climatology Argo, remote sensing wind, and reanalysis data from the National Center for Environmental Prediction/National Center for Atmospheric Research. Based on a mixed layer heat budget model, the net heat flux term was found to be the main controlling factor of temperature variability in the study region. Moreover, seasonal variations in the oceanic front were investigated and found to be strongest during September to February and weakest during May to August. This study determined that the strengthening and weakening of the temperature front were mainly controlled by the net heat fluxes and in particular, the net shortwave and net sensible heat fluxes.