GGR227H5 Study Guide - Final Guide: Pelagic Zone, Coral Reef, Maximum Sustainable Yield
Document Summary
97% ocean / 0. 3% in lake and rivers / 2. 5% in freshwater (icecap, soil, permafrost) Ocean"s npp per unit area is low but because of their large space, there total npp is high. Neritic (less than 200m depth) vs oceanic (open ocean with 90% of world"s ocean) Pelagic (open water column without sea floor) vs benthic (open water column with surface sediments) Photic (sunlight, less than 200m) vs aphotic (less than 1% of solar radiation) Shelves are productive with light and nutrients but abyssal zone is productive with nutrition. Max density of pure water ar 4 degrees. Density of seawater depends on salinity and temperature. (the higher the salinity, the denser, the colder, the denser) * remember co2 is more soluble in cold water. Density is the driver of thermohaline circulation (great conveyor belt) The thermohaline circulation is mainly triggered by the formation of deep water masses in the north atlantic.
