# Geo Lab Essay

927 Words 4 Pages
Name _________________________________________ Section __________________
EXERCISE 14 PROBLEMS/SOLUTIONS—PART I (S.I. Units)
Assume that a parcel of air is forced to rise up and over a 4000-meter-high mountain (shown below). The initial temperature of the parcel at sea level is 30°C, and the lifting condensation level (LCL) of the parcel is 2000 meters. The DAR is 10°C/1000 m and the SAR is 6°C/1000 m. Assume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends.

1. Calculate the temperature of the parcel at the following elevations as it rises up the wind-ward side of the mountain: (a) 1000 m ______ °C (b) 2000 m ______ °C (c) 4000 m ______ °C 2. (a) After
g/kg (b) What is the capacity of the air at 4000 meters? g/kg 7. What is the capacity of the air after it has descended back down to sea level on the lee side of the mountain? g/kg 8. (a) Assuming that no water vapor is added as the parcel descends down the lee side of the mountain to sea level, is the water vapor content (the mixing ratio) of the parcel higher or lower than before it began to rise over the mountain? ___________ (b) Why?

(c) What is the lifting condensation level of this parcel now? ___________ meters

Name _________________________________________ Section __________________
EXERCISE 14 PROBLEMS/SOLUTIONS—PART III (English Units)
Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain (shown below). 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 5.5°F/1000′ and the SAR is 3.3°F/1000′. Assume that con- densation begins at 100% relative humidity and that no evaporation takes place as the parcel de- scends. Indicate calculated temperatures to one decimal place.

1. Calculate the temperature of the parcel at the following elevations as it rises up the wind-ward side of the mountain:

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