北太平洋海-气系统存在很强的耦合作用，在全球气候系统中起着重要作用。前期研究发现PNA型风应力强迫诱导黑潮流轴的南北移动并激发NPO型的大气环流异常，NPO型风应力强迫诱导黑潮加速或减速并激发PNA型大气环流异常，而北太平洋局地海-气耦合使黑潮从一种型态趋向另一种型态，且存在很强的正负不对称性。揭示了热带太平洋对北太平洋风生环流调整的四种响应机制及其对北太平洋的负反馈作用，进而减弱北太平洋的大气强迫。这些发现初步建立了太平洋气候年代际变化的一种新理论框架。全球变暖已是不争的事实。北太平洋风生环流调整机理及其对大气环流的反馈效应在全球变暖背景下发生怎样的变化？发生变化的机理是什么？本项目拟融合海洋、大气再分析资料和CMIP5耦合模式结果，借助海气耦合模式及“部分耦合”和“部分阻隔”模式技术，系统地研究北太平洋风生环流对全球变暖的响应及其对大气环流的反馈效应，拓展太平洋气候年代际变化新理论。

The North Pacific ocean-atmosphere system displays an intensive coupled interaction, and plays an important role in global climate system. Previous studies found that the PNA-like wind stress forcing may cause a meridional shift of the Kuroshio jet, and then induce NPO-like atmospheric circulation anomalies, while the NPO-like wind stress may lead to an acceleration or a deceleration of the Kuroshio jet and induce PNA-like atmospheric circulation anomalies. The local air-sea coupling in the North Pacific can modulate the shift of Kuroshio from one mode to the other mode and there appears a strong positive-negative asymmetry. The North Pacific can influence tropical Pacific through four physical processes and then experience a returning negative feedback from tropics, which can weaken the atmospheric forcing in the north Pacific. These findings have formulated a preliminary new framework of the Pacific decadal climate variability. Global warming has been an indisputable fact. How will the global warming modulated the wind-driven circulation in the North Pacific and its feedback to atmospheric circulation? What are the governing mechanisms? This proposal is going to study systematically the responses of North Pacific wind-driven circulation to global warming and its feedback effects to atmospheric circulation and develop our new framework of the Pacific decadal climate variability by using a coupled ocean-atmosphere model aided with “Partial Coupling” and “Partial Blocking” modeling surgeries, and analyzing oceanic and atmospheric reanalysis data and CMIP5 coupled model outputs.