Seasonal characteristics of nutrient and nutrient structure in the Yangtze River estuary

: This data article aimed to evaluate the influencing mechanisms of the nutrients and the level of eutrophication in the Yangtze River estuary. The seasonal characteristics of nutrients (dissolved inorganic nitrogen (DIN), SiO 32− –Si, and PO 43– P) in the seawater of the Yangtze River estuary were analyzed by conducting surveys in spring and summer of 2019. The findings revealed that the concentrations of all nutrient at the surface and bottom layers were lower in spring compared to summer. NO 3− –N was typically the major form of DIN. Runoff was identified as the primary source of DIN and SiO 32− –Si, while PO 43− –P originated from a various sources.