The rate of warming of the air descending the mountains in both cases is the dry

Question

The rate of warming of the air descending the mountains in both cases is the dry adiabatic lapse rate, 10°C/km. FIGURE 1: -Temperature of air =-12°C 5 km Temperature of air =-4°C 0.0 km (1) How much would the air at mountaintop warm during adiabatic descent to the leeward mountain base? a. 6oC b, 8°C c. 10 12°C 15 d. e. (2) What is the final temperature of this mountain-borne air that arrives at the mountain's base (thus replacing the pre-existing air)? a. b. c. -6 -4 -2 d.rc e.3 (3) Does this mountain wind event represent a Foehn or a Bora? a. Foehn b. Bora

Explanation / Answer

As it is given temperature decreases 10C / KM.

1) Air at mountation top would warm during adiabatic descent to the leeward mountain base is 10X1.5 = 15C

2) We get pre-existing air temperature at mountain base is - 4C and temperature at mountain top is -12C

The height between base and mountain top is 1.5 km so temperature variability will be 15C.

So final temperature of mountain-borne air that arrives at mountain;s base will be (-12+15) = 3C

3) The mountain wind represents a '' Foehn ''. as it is a type of warm, down-slope wind that occurs in the lee (downwind side) of the mountain range.

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