Considering the relatively few studies utilizing in-situ data on this topic,this study uses the comprehensive observational data collected by the Songhang voyage in spring 2018,to analyze the spatial distribution of total suspended matter(TSM)and chlorophyll a concentrations after correcting shipboard CTD measurements against the laboratory water sample analysis data.The results show that there is a strong linear correlation between CTD measurements and water sample analysis data.The inverse distance weight interpolation has the overall optimal effect on the spatial distribution of TSM concentration and chlorophyll a concentration.The TSM concentration is higher in the nearshore areas and in the bottom water near the seabed,and there are two high-value centers in the observation area;the chlorophyll a concentration is higher in the nearshore areas with obvious flake high-value structure,and higher in the vertical upper surface layer.The distributions of TSM concentration and chlorophyll a concentration in the north and south of the Yangtze River Estuary show different characteristics and negative correlation.The hydrodynamic processes including the runoff of the Yangtze River,ocean currents,and tidal mixing are the main factors affecting the distribution characteristics of TSM concentration and chlorophyll a concentration in the area.
关键词
长江口邻近海域/悬浮物浓度/叶绿素a浓度/空间插值/断面分析/大面分析
Key words
adjacent waters of the Yangtze River Estuary/total suspended matter concentration/chlorophyll a concentration/spatial interpolation/section analysis/large area analysis
维普
万方数据