EOSC 314 Lecture Notes - Lecture 11: Pycnocline, Desalination, Halocline
6 Oct 2017
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Decrease salinity - add fresh water: melting ice, runoff from rivers. Increase salinity subtract fresh water: evaporate water, sea ice formation. Here are a lot more ions in sea water compared to stream water. Earth"s hydrologic cycle: processes that affect seawater salinity, recycles water among ocean, atmosphere and continents, water in continual motion between water reservoirs. Earths water: 97. 2% in ocean, 2. 15% in frozen glaciers and ice caps, 0. 62% in groundwater and soil moisture, 0. 02% in lakes. Where do ions come from: volcano"s, rocks, dust blowing off of desert. Acid: releases a hydrogen ion (h+) when dissolved in water. Pycnocline: maximum change in density with depth and equals out density, icopycnal in cold areas, surface and deep water mix. Thermocline: maximum change in temperature with depth, drives density a lot, pretty stationary in deep ocean, isothermal in cold areas of earth, no constrains in temperature, surface and deep water mix.
