ENV100Y5 Lecture 18: L18 Ch12 - Marine and Coastal Systems
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ENV100Y5 Full Course Notes
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(cid:1011)(cid:1005)% of earth(cid:859)s surfa(cid:272)e is (cid:272)o(cid:448)ered (cid:271)(cid:455) o(cid:272)ea(cid:374)s most is in oceans as opposed to freshwater. Mean depth ~ 3. 8 km - absolute darkness within. Extremely poorly studied because of the depth and darkness of the oceans. Nasa(cid:859)s (cid:271)udget e(cid:454)(cid:272)eeds noaa(cid:859)s (cid:271)(cid:455) (cid:1005),(cid:1010)(cid:1004)(cid:1004)x: we(cid:859)(cid:448)e e(cid:454)plored spa(cid:272)e (cid:271)etter tha(cid:374) (cid:449)e(cid:859)(cid:448)e e(cid:454)plored the depths of our o(cid:449)(cid:374) pla(cid:374)et. Ocean water: not just h2o: 96. 5% water. Ions of dissolved salts; dissolved gases which make some of the other portion of oceans: oxygen (created by photosynthesis, bacterial metabolism, atmospheric diffusion) These processes affect the amount of oxygen in the ocean. Fewer oxygen molecules which is why it is harder to breathe at higher altitudes. Concentration of oxygen is 18% in the ocean wherever you are but it varies a lot with temperatures: major reservoir for co2 so(cid:373)ethi(cid:374)g that(cid:859)s e(cid:373)erged o(cid:448)er the last de(cid:272)ade or so. Ocean atmospheric interaction is huge in driving ocean phenomenon: gases are vertically stratified (structured)
