title: Spatial-Temporal Variations of Chlorophyll-a in the Adjacent Sea Area of the Yangtze River Estuary Influenced by Yangtze River Discharge.
abstract: Carrying abundant nutrition, terrigenous freshwater has a great impact on the spatial and temporal heterogeneity of phytoplankton in coastal waters. The present study analyzed the spatial-temporal variations of Chlorophyll-a (Chl-a) concentration under the influence of discharge from the Yangtze River, based on remotely sensed Chl-a concentrations. The study area was initially zoned to quantitatively investigate the spatial variation patterns of Chl-a. Then, the temporal variation of Chl-a in each zone was simulated by a sinusoidal curve model. The results showed that in the inshore waters, the terrigenous discharge was the predominant driving force determining the pattern of Chl-a, which brings the risk of red tide disasters; while in the open sea areas, Chl-a was mainly affected by meteorological factors. Furthermore, a diversity of spatial and temporal variations of Chl-a existed based on the degree of influences from discharge. The diluted water extended from inshore to the east of Jeju Island. This process affected the Chl-a concentration flowing through the area, and had a potential impact on the marine environment. The Chl-a from September to November showed an obvious response to the discharge from July to September with a lag of 1 to 2 months.
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China. mfacewang@gmail.com.|International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China. mfacewang@gmail.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China. jianghong_china@hotmail.com.|International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China. jianghong_china@hotmail.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China. jiaxinking@126.com.|International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China. jiaxinking@126.com.
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Jin
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China. lzhxy77@gmail.com.|International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China. lzhxy77@gmail.com.
authors.forename: Xiuying
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China. luxh43@gmail.com.|International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China. luxh43@gmail.com.
authors.forename: Xuehe
authors.initials: X
authors.lastname: Lu
authors.affiliation: Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. yuwyuw1306@126.com.
authors.forename: Yueqi
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002681:China; D002734:Chlorophyll / Q000032:analysis*; D000077194:Chlorophyll A; D063366:Estuaries; D005618:Fresh Water; D057097:Harmful Algal Bloom; D015233:Models, Statistical; D009792:Oceans and Seas; D010839:Phytoplankton; D058998:Remote Sensing Technology; D045483:Rivers; D012621:Seasons
chemical_list: D002734:Chlorophyll; D000077194:Chlorophyll A
keywords: SeaWiFS; Yangtze River estuary; chlorophyll-a; discharge; spatial-temporal variations