EES 108 Class 13

EES 108 Class 13 - Last Night's Weather Significant Tornado...

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Last Night’s Weather Significant Tornado outbreak Arkansas, Mississippi, Tennessee, Kentucky 22 dead, scores injured Tennessee 12+ dead, 60+ injured Most in Memphis area
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Storm Damage in Memphis
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Dormitory, Union U., Jackson TN
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Dorm Parking Lot, Union U.
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Remains of house, Sumner County
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What caused this?
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What caused this?
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Stable Unstable
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SWEAT index: 488 Interpretation: <272: Low risk  273-299: Slight  risk 300-400:  Moderate risk 401-600: Strong  risk, isolated  tornadoes  possible 601-800:  High risk,  scattered  tornadoes >800: High wind  damage, little  tornado risk
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Meteorology and Air Pollution Faster wind Moves pollution away faster Dilution in horizontal direction Increases thickness of “boundary layer” • Boundary layer is where air is turbulent and mixes thoroughly • Dilution in vertical direction
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Valley inversion Typical for Nashville This kind of inversion is most common in  winter and at night
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Inversion traps pollution in Grand  Canyon
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Typical Los Angeles Inversion Descending air from a high-pressure cell, “Pacific High” Same cell also causes Santa-Ana winds
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Inversion traps smog in LA
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Chimney Effect
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Frequency of reduced dispersion
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Sulfurous (coal) smog Meteorological  conditions trap smoke Largely primary  pollutants More common in winter  and at night Why?
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This note was uploaded on 04/09/2008 for the course HIST 101 taught by Professor Guliver during the Spring '08 term at Vanderbilt.

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EES 108 Class 13 - Last Night's Weather Significant Tornado...

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