An improved method for evaluating the seasonal variability of total suspended sediment flux field in the Yellow and East China Seas  

作　　者：PANG Chongguang YU Wei YANG Yang HAN Danxiu 

机构地区：[1]Doctor, Researcher, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China [2]Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China, Graduate School of ChineseAcademy of Sciences, Beijing 100039, China [3]Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China, Graduate School of Chinese Academy of Sciences, Beijing 100039, China [4]China University of Petroleum, Beijing 102249, China

出　　处：《International Journal of Sediment Research》2011年第1期1-14,共14页国际泥沙研究（英文版）

基　　金：supported by the Knowledge Innovation Program of Chinese Academy of Sciences(Grant No.KZCX2-YW-JS205);the National Basic Research Program of China(973 Program,Grant No. 2007CB411802);the National Natural Science Foundation of China(Grant No.40406025)

摘　　要：The suspended sediment flux field in the Yellow and East China Seas （YECS） displays its seasonal variability. A new method is introduced in this paper to obtain the flux field via retrieval of ocean color remote sensing data, statistical analysis of historical suspended sediment concentration data, and numerical simulation of three-dimensional （3D） flow velocity. The components of the sediment flux field include （i） surface suspended sediment concentration inverted from ocean color remote sensing data; （ii） vertical distribution of suspended sediment concentration obtained by statistical analysis of historical observation data; and （iii） 3D flow field modeled by a numerical simulation. With the improved method, the 3D suspended sediment flux field in the YECS has been illustrated. By comparison with the suspended sediment flux field solely based on the numerical simulation of a suspended sediment transport model, the suspended sediment flux field obtained by the improved method is found to be more reliable. The 3D suspended sediment flux field from ocean colour remote sensing and in situ observation are more closer to the reality. Furthermore, by quantitatively analyzing the newly obtained suspended sediment flux field, the quantity of sediment erosion and deposition within the different regions can be evaluated. The sediment exchange betw.een the Yellow Sea and the East China Sea can be evident. The mechanism of suspended sediment transport in the YECS can be better understood. In particular, it is suggested that the long-term transport of suspended sediment is controlled mainly by the circulation pattern, especially the current in winter.The suspended sediment flux field in the Yellow and East China Seas （YECS） displays its seasonal variability. A new method is introduced in this paper to obtain the flux field via retrieval of ocean color remote sensing data, statistical analysis of historical suspended sediment concentration data, and numerical simulation of three-dimensional （3D） flow velocity. The components of the sediment flux field include （i） surface suspended sediment concentration inverted from ocean color remote sensing data; （ii） vertical distribution of suspended sediment concentration obtained by statistical analysis of historical observation data; and （iii） 3D flow field modeled by a numerical simulation. With the improved method, the 3D suspended sediment flux field in the YECS has been illustrated. By comparison with the suspended sediment flux field solely based on the numerical simulation of a suspended sediment transport model, the suspended sediment flux field obtained by the improved method is found to be more reliable. The 3D suspended sediment flux field from ocean colour remote sensing and in situ observation are more closer to the reality. Furthermore, by quantitatively analyzing the newly obtained suspended sediment flux field, the quantity of sediment erosion and deposition within the different regions can be evaluated. The sediment exchange betw.een the Yellow Sea and the East China Sea can be evident. The mechanism of suspended sediment transport in the YECS can be better understood. In particular, it is suggested that the long-term transport of suspended sediment is controlled mainly by the circulation pattern, especially the current in winter.

关 键 词：Suspended sediment flux field Seasonal variability Yellow and East China Seas Regression equation Numerical simulation 

分 类 号：TV148.1[水利工程—水力学及河流动力学] S937[农业科学—渔业资源]