Pathway and Flux of Inputting Chemical Substances from the Kuroshio to the East China Sea
Liu Wei1, 2, 3, Song Jinming1, Yuan Huamao1, Li Xuegang1, Li Ning1, Duan Liqin1, Zuo Jiulong1, 3
1. Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071; 2 .Shandong Analysis and Test Center, Jinan 250014; 3. University of Chinese Academy of Sciences, Beijing 10049
The inputting pathway of chemical substances from the Kuroshio to China Margin seas and inputting characteristics of biogenic elements, trace elements, isotopes and other chemical substances from the Kuroshio to the East China Sea (ECS) were reviewed on the basis of hydrological analysis of the Kuroshio, and some important issues which should be concerned in this research field were put forward in the end. Luzon Strait, Sea off Northeastern Taiwan and Southwestern Kyushu are the critical areas for the Kuroshio input. Extension of the Kuroshio surface water, upwelling of the Kuroshio subsurface water and intermediate water, seasonal axial swing are the basic means for the input of chemical substances. The concentration of biogenic elements in the Kuroshio water increases with depth. For biogenic elements in the ECS, the influence of the Kuroshio is the weakest in summer, then in spring, and strongest in autumn and winter. The influx of biogenic elements from the Kuroshio is higher than other sources like river and atmosphere, and the intermediate water owns the largest share among all layers. The distribution and influx to the ECS of trace elements show difference with biogenic elements, and differ from each other under the impact of the upwelling of Kuroshio subsurface water. Isotopes can indicate the incursion of the Kuroshio and show certain correlation with nutrition. The Kuroshio is also an important source for some green house gas like N2O, CH4, which will further affect the ecosystem of the ECS. The future research should focus on systematical offshore observation, investigation of chemical substances like trace elements and isotopes, controlling process of chemical substances input from the Kuroshio to China margin seas.
Liu Wei, Song Jinming, Yuan Huamao, Li Xuegang, Li Ning, Duan Liqin, Zuo Jiulong. Pathway and Flux of Inputting Chemical Substances from the Kuroshio to the East China Sea[J]. Advance in Earth Science, 2015, 30(8): 904-914.