Diurnal Variability of Turbidity Fronts Observed by Geostationary Satellite Ocean Color Remote Sensing

作     者：Hu, Zifeng Pan, Delu He, Xianqiang Bai, Yan 

作者机构：State Ocean Adm Inst Oceanog 2 State Key Lab Satellite Ocean Environm Dynam 36 North Bao Chu Rd Hangzhou 310012 Zhejiang Peoples R China Chinese Acad Sci South China Sea Inst Oceanol State Key Lab Trop Oceanog 164 Xingangxi Rd Guangzhou 510301 Guangdong Peoples R China Univ Chinese Acad Sci 19A Yuquan Rd Beijing 100049 Peoples R China 

出 版 物：《REMOTE SENSING》 (遥感)

年 卷 期：2016年第8卷第2期

页      面：147-147页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1002[医学-临床医学] 070801[理学-固体地球物理学] 07[理学] 08[工学] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 

基　　金：National High Technology and Development Program of China [2014AA123301] National Basic Research Program (973 Program) of China [2015CB954002] Public Science and Technology Research Fund Projects for Ocean Research National Natural Science Foundation of China [41322039, 41321004, 41271378, 41406202] National Program on Global Change and Air-Sea Interaction of China [GASI-03-03-01-01, GASI-02-SCS-YGST01, GASI-02-PAC-YGST01, GASI-02-IND-YGST01] 

主　　题：GOCI turbidity front entropy-based algorithm sea surface currents 

摘      要：Monitoring front dynamics is essential for studying the ocean s physical and biogeochemical processes. However, the diurnal displacement of fronts remains unclear because of limited in situ observations. Using the hourly satellite imageries from the Geostationary Ocean Color Imager (GOCI) with a spatial resolution of 500 m, we investigated the diurnal displacement of turbidity fronts in both the northern Jiangsu shoal water (NJSW) and the southwestern Korean coastal water (SKCW) in the Yellow Sea (YS). The hourly turbidity fronts were retrieved from the GOCI-derived total suspended matter using the entropy-based algorithm. The results showed that the entropy-based algorithm could provide fine structure and clearly temporal evolution of turbidity fronts. Moreover, the diurnal displacement of turbidity fronts in NJSW can be up to 10.3 km in response to the onshore-offshore movements of tidal currents, much larger than it is in SKCW (around 4.7 km). The discrepancy between NJSW and SKCW are mainly caused by tidal current direction relative to the coastlines. Our results revealed the significant diurnal displacement of turbidity fronts, and highlighted the feasibility of using geostationary ocean color remote sensing technique to monitor the short-term frontal variability, which may contribute to understanding of the sediment dynamics and the coupling physical-biogeochemical processes.