Environmental Science 1021F/G Lecture Notes - Lecture 9: Volatile Organic Compound, Air Pollution, Sea Spray
20 Mar 2016
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Several layers: different temps. , pressure, density and composition, closer to the earths surface is higher pressure and more matter due ot gravity, thermosphere, mesosphere, stratosphere (17-50km, troposphere (0-17km) Composition similar to troposphere: has less water vapour, less matter, more ozone than troposphere. Protects us from uv rays, cancer, cataract: good ozone (ozone layer) O2 + uv sun = good o3 know this. Good ozone in stratosphere, bad ozone in troposphere. N (78%), o (21%), water vapour (0-4%), co2 (0. 038%), ( green house gases) ar (<1%) Involved in biogeochemical cycles (nutrient cycling: thinnest layer, responsible for weather and climate. Hurricane etc: bad ozone (ground level ozone, vocs + no(x) + sun = bad o3 know this. Outdoor air pollution: air pollution: chemicals in the atmosphere @ concentration high enough to affect climate/harm organisms and materials (infrastructure) Factories, industry: natural (smallest, dust, volatile organic compounds (vocs) from plants, plant decay, forest fires, volcanoes, sea spray.
