EVSC 1010 Lecture Notes - Lecture 2: Continental Crust, Igneous Rock, Gabbro
12 Dec 2017
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Document Summary
Structure of ocean crust layer 1 is sediment, layer 2 is pillow basalt, layer 3 is vertical dikes overlying gabbro (intrusive igneous rock) and below this is upper mantle. Salinity the amount of salt found in 1000 grams of water the ocean is about 35 ppt, so. Attenuation of light in vertical water column as you go deeper into the water, the amount of light that gets through decreases. Relationship between water temperature and density colder water is more dense, warmer water is less dense. Thermocline zone of dramatic temperature change in the vertical profile of water this is when the surface water stops being warmed and cools dramatically. Pycnocline a rapid change in water density with depth freshwater usually by temperature and ocean by temperature and/or salinity. Seasonal dynamics of thermocline in polar and temperate regions, the thermocline is the most dramatic in the summer thermocline remains consistent in the tropics throughout the year because of less seasonal variation.
