GLY 102 Study Guide - Midterm Guide: Nansen'S Fram Expedition, Atmospheric Circulation, Negative Feedback
14 Dec 2020
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Document Summary
Well defined streams of water moving in the ocean. Ekman transport- the surface ocean gets transported to the right of the wind direction (similar to coriolis; northern hemisphere); (left for southern hemisphere) surface current moves at a 45 angle to the wind. Movement based on density: what influences density: salinity, temperature; increased salinity/decreased temperature = increased density, denser water will sink- brings surface waters to deep ocean basin; sinking the surface water brings oxygen and nutrients to the bottom. Upwelling- vertical ocean currents drawing deep, cold water towards the surface; related to surface wind effects. Downwelling- vertical ocean currents force water to sink. Multiple currents that flow together around the ocean basin. Warm water is found on the west side of an ocean, because it came from the tropics. Cold water is found on the east side of an ocean, because it came from the poles. High salinity in center! (evaporation concentrates the salts)
