Before revision: Coastal downwelling processDownwelling is the process of accumulation and sinking of higher density material beneath lower density material, such as cold or saline water beneath warmer or fresher water or cold air beneath warm air .
After revision: Schematic of coastal downwelling in the Northern Hemisphere.|300x300pxDownwelling is the downward movement of a fluid parcel and its properties (e.g., salinity, temperature, pH) within a larger fluid .