EOS 110 Lecture Notes - Lecture 8: Crab Fisheries, Thermohaline Circulation, Keeling Curve
25 Oct 2016
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Document Summary
Upper intermediate waters in many areas of the open ocean are losing oxygen. There has been a proliferation of very-low oxygen. Dead zones in nearshore waters around the continents. Human activities and governmental policies are contributing to these phenomena via different pathways, some inadvertently. Within 3 three years, saw co2 levels increase (exponential) Plants are photosynthesizing, sucking the co2 out of the atmosphere in the summer. Then leaves decompose = release back into atmosphere. Heat is being retained in our world we just cant see it very well - trapped in the upper ocean. Warm upper ocean in terms of density = density goes down. The decomposition of organisms and cells that sink down through the sea - things consume those cells, and they also consume oxygen. Plankton - taking it out of upper ocean. Look at trends of oxygen and temperature graphs. 10-12% loss in dissolved oxygen concentration per century.
