Geo Lab
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 the parcel of air has descended down the lee side of the mountain to sea level, what is the temperature of the parcel? ___________ °C (b) Why is the parcel now warmer than it was at sea level on the windward side (what is the source of the heat energy)? 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 2000 meters? (b) Why? 4. (a) On the lee side of the mountain, is the relative humidity of the parcel increasing or decreasing as it descends from
4000 meters to sea level? (b) Why?
Name _________________________________________ Section __________________
EXERCISE 14 PROBLEMS/SOLUTIONS—PART II (S.I. Units)
Answer the following questions after completing the problems in Part I. You will also need to refer to the chart of Saturation Mixing Ratios in Figure 13-1; interpolate from the chart as needed. As- sume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends. 5. (a) On the windward side of the mountain, should the relative humidity of the parcel change as it rises from 2000 m to 4000 m? (b) Why? 6. As the air rises up the
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 the parcel of air has descended down the lee side of the mountain to sea level, what is the temperature of the parcel? ___________ °C (b) Why is the parcel now warmer than it was at sea level on the windward side (what is the source of the heat energy)? 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 2000 meters? (b) Why? 4. (a) On the lee side of the mountain, is the relative humidity of the parcel increasing or decreasing as it descends from
4000 meters to sea level? (b) Why?
Name _________________________________________ Section __________________
EXERCISE 14 PROBLEMS/SOLUTIONS—PART II (S.I. Units)
Answer the following questions after completing the problems in Part I. You will also need to refer to the chart of Saturation Mixing Ratios in Figure 13-1; interpolate from the chart as needed. As- sume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends. 5. (a) On the windward side of the mountain, should the relative humidity of the parcel change as it rises from 2000 m to 4000 m? (b) Why? 6. As the air rises up the