黑潮-亲潮延伸区具有活跃的海洋中尺度涡活动，由其引起的海温异常能改变局地海洋大气边界层内的大气状态。近期模式研究指出中尺度涡对大气影响的累积效果可以对风暴轴产生显著的贡献，但其具体机制和季节差异仍有待深入研究，并需要利用观测和再分析资料进行确认。由于中尺度涡的空间尺度较小，相关研究需要依托高分辨率的大气再分析资料和数值模式。本项目拟借助高分辨率再分析资料和大气环流数值模式研究黑潮-亲潮延伸区的中尺度涡对风暴轴的影响，并揭示其特征、机制和季节差异。本项目的研究成果将有助于进一步理解黑潮-亲潮延伸区海气相互作用及北太平洋年代尺度气候反馈机制。

The Kuroshio-Oyashio Extension (KOE) region is characterized by vigorous mesoscale eddy activity. The associated mesoscale sea surface temperature (SST) perturbations can change the atmospheric state in the marine atmospheric boundary layer. Recent modeling studies further proposed that the accumulated effect of mesoscale SST perturbations may exert significant influence on the storm track. This influence, however, has to be verified using observational or reanalysis data, and its mechanism and seasonal variation still need to be thoroughly examined. Due to the small spatial scale of mesoscale eddies, high resolution atmospheric reanalysis datasets and models have to be employed. This project plans to examine the influence of mesoscale eddies on the overlying atmospheric storm track, both taking advantage of high resolution reanalysis data and general circulation model. The 3-D characteristics, mechanism and seasonal variation will be explored. The findings of this project would contribute to the understanding about air-sea interaction in the KOE region and decadal climate feedback over the North Pacific sector.