Suspended Biogenic Silica and Associated Environmental Data from the Changjiang Estuary and Adjacent East China Sea in 2025

This dataset contains quality-controlled hydrographic, nutrient, and particulate measurements collected during four seasonal cruises in the Changjiang Estuary and adjacent East China Sea in March, May, July, and October 2025. The particle-based dataset includes sampling metadata, temperature, salinity, turbidity, photosynthetically active radiation (PAR), euphotic depth (Zeu), dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), dissolved silicate (DSi), suspended particulate matter (SPM), particulate organic carbon (POC), biogenic silica (BSi), and lithogenic silica (LSi). A separate quality-control summary documents validation of sample numbers, BSi statistics, missing values, and other dataset checks.