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esm222_06_7_structure

esm222_06_7_structure - ESM 222 Structure of Environmental...

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ESM 222 © ARTURO KELLER 1 ESM 222 Structure of Environmental Media ESM 222 © ARTURO KELLER 2 Structure of Environmental Media Atmosphere Structure Aerosols Soils Structure Composition Microbial activity Water Bodies Rivers and Streams Lakes Oceans Particulate Matter Sediments
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3 Atmospheric Composition Source: Pollution Science, Pepper et al 1996. ESM 222 © ARTURO KELLER 4 Atmosphere Pollutants of concern in the atmosphere are: Urban air pollutants: O 3 via NO x and VOCs, CO, NO x , SO 2 , particulates, HAPs, ... Acid rain gases: NO x , SO 2 , … Greenhouse gases: CO 2 , CH 4 , N 2 O, CFCs, ... Ozone destroyers in stratosphere: CFCs, …
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Source: Pollution Science, Pepper et al, 1996. ESM 222 © ARTURO KELLER 6 Atmosphere For urban air pollution, troposphere is where all action occurs Surface layer at bottom of boundary layer ~1/10th of boundary layer, typically tens of meters surface roughness and surface heat exchange affect properties (temperature, wind speed, humidity)
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