Biology 2485B Lecture Notes - Thermosphere
17 Apr 2014
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Document Summary
Atmospheric layers: thermosphere, mesosphere, stratosphere, very high levels of ozone concentrations, ozone reflects uv radiation, troposphere 10km high, above surface layer, cold air represents barrier that stops mixing w/ altitude, tropopause barrier between troposphere and stratosphere, as warm air goes up, it can"t get past the cold barrier and goes down. Convective circulation: warm air rises (cid:224) cools (cid:224) cold air drops to the ground, moisture in warm air is high (cid:224) acts like a sponge, cold air is very dry due to lower saturation, cold air releases moisture (cid:224) hence precipitation, rising warm air creates low pressure (cid:224) draws in wind, cool air sinks and pushes air outward, produce convection cells. Air pollution: pollutant impurity with negative impacts, primary pollutants released in a harmful form, secondary pollutants pollutants that are released and interact chemically with atmospheric components or other pollutants to create a harmful form, negative impacts come from impure sources (ex. impure coal)
