EPS SCI 15 Lecture 11: Lecture 11
31 Oct 2016
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Document Summary
Highest salinity (due to high surface evaporation rates) = lowest density (due to high water temp) Rapid changes in temp, salinity and density from 100 m to 1000 m. Youngest deep water = sw and ne of iceland (n atlantic) Highest oxygen concentration = high lat (northern hemisphere) Highest nitrogen concentration = deep waters, high lat (southern hemisphere) + n paci c. Lowest oxygen concentration = deep water, high lat (southern hemisphere) Lowest nitrogen concentration = surface water, high lat (northern hemisphere) Oxygen: used by respiration = less in older water. Nitrogen: produced in waste = more in older water. Dye (downward spiral): surface layer does not mix with higher salinity bottom water. Ice sheet melt = decreased salinity, increased density = ocean temp rise = decreased density = increase density strati cation = currents slow down due to less vertical mix- ing.
