BIOL361 Lecture 3: Bio 361 Lec 3
4 Mar 2017
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Oceanic range -(cid:883). 9 to 4(cid:882) c, deep ocean is cold (cid:884)-4 c. Salt in the water helps depress freezing point (slows the freezing point). Additions: latitudinal gradient of solar heating, geothermal heating, internal friction, water vapour condensation. Losses: heat loss by ocean surface to the air, back radiation of surface, convection of heat of oceans but more on marginal seas (shallow waters). Number of grams of dissolved inorganic solids per 1000g of seawater. Units are parts per thousand or psu (practical salinity unit). atmosphere, evaporation (cid:523)requires energy to evaporate(cid:524), evap doesn"t have a huge affect on. Controlled by: increases when there"s evaporation, sea-ice formation(the more ice, the more salt is under the ice in the water, ice doesn"t trap salt ion into it"s formation, it"s pure water). Decreases from precipitation, river runoff (fresh water addition). Salinity in the open ocean is 32 to 38%. Carbon (28 variable, depends how much life there is, life takes up carbon)
