The Rapid Warming of North Atlantic Subpolar Basin during 1993-2012

North Atlantic subpolar basin is a region of complex dynamics and governing the global heat transport by these processes. During 1993-2012, the rapid warming in North Atlantic subpolar basin is significant in ocean heat content. Previous studies of this warming indicated that the diabatic process and meridional heat transport governing the warming trend, neglecting the role of ocean Rossby waves. The purpose of the present study is to verify whether the adiabatic process and Rossby waves play roles in this warming. We deploy some simple models including one-layer barotropic model, reduced gravity model and two-layer model with realistic wind field and topography. The comparison of the results of models with reanalysis and altimeter data demonstrates that this warming in Labrador Sea and Irminger Sea results from adiabatic process forces by the local and remote wind field. Topography Rossby wave triggered by topography and planetary Rossby wave make warming signals propagating westward to produce the rapid warming in western subpolar basin. Ekman pumping is relatively important in eastern subpolar basin. As a result, adiabatic process producing warming signals propagated by ocean waves makes significant contributions to the warming trend in Atlantic subpolar basin during 1993-2012.