源区黑潮次表层高盐水在流经吕宋海峡和台湾岛以东海域时，会将太平洋的能量、热量、盐分以及气候变化信号输送到南海和东海，从而对我国近海的环流结构、水文状况、生态环境和气候变化产生重要影响。然而，目前有关源区黑潮次表层高盐水的研究尚少，迄今对该水团的时空变化特征和机制的认识仍不够全面、深入。因此，本项目拟通过资料分析、理论研究和数值模拟相结合的方法，研究源区黑潮次表层高盐水的时空变化，揭示其时空变化规律；探讨源区黑潮流量、风场、北赤道流、中尺度涡以及ENSO等现象对源区黑潮次表层高盐水的影响，从而阐明它的变化机制。本项目将有助于我们从源头上加深对黑潮的了解，从新的角度认识和预测源区黑潮对中国近海生态系统的影响过程，为该海域的海洋生态环境和渔业资源保护提供可靠的科学依据和技术支撑。

Flowing along the Luzon Strait and east of Taiwan Island, the Kuroshio Subsurface Saline Water (KSSW) in the source region can carry large amounts of energy, heat, salt and climate change signal from the Pacific to the South China Sea and East China Sea. So, it has a large impact on the circulation pattern, hydrographic condition, ecological environment and climate change in China Seas. At present, however, there are fewer studies on the KSSW in the source region. Therefore, the spatial and temporal variation of KSSW, and its dynamic mechanism remain unclear, and need to be further studied. Thus, based on the analysis of historical data, theoretical analysis and numerical simulation, we try to investigate the spatial and temporal variation of KSSW in the source region, and study the effects of Kuroshio transport, wind, North Equatorial Current, mesoscale eddies and ENSO on the spatial and temporal variation of KSSW, and clarify its dynamic mechanism. This study can improve our understanding and predicting on the influence process of Kuroshio in the source region on the ecosystem in China Seas from a new point of view, and provide scientific basis and technological support for the protection of ecological environment and fishery resources.