Physical Geography Laboratory Manual Name Section EXERCISE 21 PROBLEMS-PART II (
ID: 231278 • Letter: P
Question
Physical Geography Laboratory Manual Name Section EXERCISE 21 PROBLEMS-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 20-1; interpolate from the chart as needed. Assume 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 200 m to 400 m? (b) Why? 6. As the air rises up the windward side of the mountain What is the capacity (saturation mixing ratio) of the rising air at 2000 meters? (a) g/kg (b) What is the capacity of the air at 4000 meters? gkg 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? What is the lifting condensation level of this parcel now, after descending to sea level on the lee side of the mountain? (c) meters 122 Copyright © 2014 Pearson Education, Inc.Explanation / Answer
ANSWERS-
5).
a. NO.
b. With increased cooling air rises ,capacity decreases,condensation takes place and so relative humidity stays at about 100%.
6).
a. 7.6 g/kg.
b. About 3.1 g/kg.
7). 43g/kg.
8).
a. Lower.
b. Water vapour was lost during condensation on the windward side.
c. 2000 meters.