EAPS 10400 Lecture 1: Lecture 1 Notes
13 Sep 2018
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Sinking of the titanic speed of sound in sea water = 1500 m/s: beam of sound waves travels to bottom and reflected back to ship, depth = v (t/2) 3000 m/s: multibeam reader- further the depth, bigger the spread of beam reader, red- shallow, blue- deeper. The deeper the water the wider the multibeam detection path. True: change in return time means a change in surface altitude. Measuring the height of the ocean surface: advantage of geosat: taking thousands of measurements every second- allows it to average out. This is about 3 times deeper than the deep scuba diving. There is life that uses these chemical reactions called chemosynthesis. Black smokers- hydrogen sulfide develop tube worms: cold seep ecosystems- underwater lake- (cid:448)ery salty (cid:449)ater more dense, so sinks to the bottom. Separated by density clams, tube worms- use methane as energy source instead of photosynthesis: geographical information system- computer programs that allow us to view different layers of spatial data.
