OCEAN 101 Lecture Notes - Lecture 1: Aragonite, Logarithmic Scale, Upwelling
Document Summary
Normal d. o. is greater than or equal to 6mg/l. Low d. o. is less than 2mg/l: hypoxic water. 0mg/l is anoxic: high at the surface because . Mixing at the surface because of the wind (air-surface interface), least seasonal variation. Photosynthesis in the photic zone: low d. o. at depth because . Less mixing: oxycline acts as the barrier for mixing because d. o. can"t move through the layer. Respiration: mainly by bacteria because they use d. o. to decompose organic matter. Bacteria have a greater biomass than fish, therefore they have a greater effect on. D. o: oxygen rises near the bottom because of increasing pressure and decreasing temperature, in atmosphere - 21, in sea water - 36% Increased because of the photosynthesis done by phytoplankton. Increases due to weather that causes mixing. Decreases in d. o. due to respiration: lots of bacteria for the process of decomposition, cellular respiration by the biology. !1: dissolved oxygen produced through photosynthesis, produced by phytoplankton.
