EES 108 Class 11

EES 108 Class 11 - Lifting condensation level How high is...

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Lifting condensation level How high is it? Simple notion: Temp = 32°C • Dew point = 8°C Dew-point depression: T – T D  = 24°C Every kilometer of height Temp drops 10°C Dew point drops 2°C So the parcel is 8°C closer to  the dew point. Height of LCL above  ground: T 0  = air temp at ground T d  = dew point at ground Height T T d T – T d 0 32 8 24 1 22 6 16 2 12 4 8 3 2 2 0 km / C 8 LCL 0 d T T - =
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What makes air rise to LCL?
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Local Convective Lifting
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Convergence
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Frontal Wedging Warm Front: Warm air overtakes cold
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Frontal Wedging Warm Front: Warm air overtakes cold
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Work an example Temperature at A: 27°C Mixing ratio at A: 10 g/kg Wet Adiabatic Lapse Rate: 5°C/km a) Dewpoint at A? b) Where is LCL? c) What is temperature at top? d) What is dew-point at top? e) What is temperature at B? f) What is dewpoint at B? g) What is relative humidity at B?
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Orographic lifting
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Orographic lifting
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Temperature at A: 27°C Mixing ratio at A: 10 g/kg Wet Adiabatic Lapse Rate: 5°C/km a) Dewpoint at A? b) Where is LCL? c) What is temperature at top? d)
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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 11 - Lifting condensation level How high is...

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