LIFESCI 2H03 Lecture Notes - Coriolis Force, Norwegian Current, Northern Hemisphere

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Total amount of solid material dissolved in water. The poles are less salty due to melting. The evaporation of water at the equator leads to more salinity. The deeper we go into the oceans the less salty (overall) it gets, it also become more uniform: deeper ocean salinity is nearly the same. Pycnocline, the abrupt change in density with depth: temperature plays a huge roll in the density of water. Warmer water tends to be less dense (near the top: maximum density occurs at 4 degrees celsius, thermocline, is the name given to the increase in temperature as the depth decreases. Radiation can only penetrate so deep . Temperature is the dominant factor as to why we see differences in the deeper vs. surface water. Movement of water is persistent and horizontal. At surface it is driven by friction from prevailing winds. No surface current below 100m: the currents redistribute heat.

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