EXERCISE 16 PROBLEMS-PART III (English Units) Assume that a parcel of air is for

Question

EXERCISE 16 PROBLEMS-PART III (English Units) Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain (as shown). The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 55F/ 1000 feet and the SAR is 3.3F/1000 feet. Assume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends. Indicate calculated temperatures to 1 decimal place. 5000 ft 4000 1 -3000n. 2000 t LCL 76.5 F O P. Calculate the te Calculate the temperature of the parcel at the following elevations as it rises up the wind- ward side of the mountain. 1. F (c) 6000 feet-- --F (a) 1000 feet. (a) --oF (b) 3000 feet After the parcel of air has descended down the lee side of the mountain to sea level, what is the temperature of the parcel? Why is the parcel now warmer than it was at sea level on the windward side (what is the source of the heat energy)? 2. (b) 3. (a) On the windward side of the mountain, is the relative humidity of the parcel increasing or decreasing as it rises from sea level to 3000 feet? Legal Notic e I Privacy Pokicy Perrissions I Support Feedback

Explanation / Answer

a parcel of air is forced to rise up and over a 6000-foot-high mountain (as shown). The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 55F/ 1000 feet and the SAR is 3.3F/1000 feet. Assume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends. Indicate calculated temperatures to 1 decimal place. 5000 ft 4000 1 -3000n. 2000 t LCL 76.5 F O P.

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