Answer the following questions after completing the problems in Part III. You wi
ID: 114398 • Letter: A
Question
Answer the following questions after completing the problems in Part III. You will also need to refer to the chart of Saturation Mixing Ratios in Figure 13-1; 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 3000 to 6000’?
(b) Why?
6. As the air rises up the windward side of the mountain:
(a) What is the capacity (saturation mixing ratio) of the
rising air at 3000 feet? ______ g/kg
(b) What is the capacity of the air at 6000 feet? __________ 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? ___________ feet
Explanation / Answer
5. (a): On the windward side of the mountain, the relative humidity of the parcel DOESN'T CHANGE as it rises from 3000 feet to 6000 feet.
(b). The relative humidity of the parcel don't really change as it rises from 3000 to 6000 feet because the relative humidity stays about 100% and as cooling air rise and increase, capacity decreases and condensation takes place.
6. As the air rises up the windward side of the mountain:
(a): The capacity of the rising air at 3,000 feet is 11.1 g/kg
(b): The capacity of the rising air at 6,000 feet is 7.6 g/kg
Because as the air rises up the windward side of the mountain it expands and cools, climate is generally humid.
7. What is the capacity of the air after it has descended back down to sea level on the leeward side of the mountain is approximately 24 g/kg.
8. (a): Assuming that no water vapor is added as the parcel descends down the leeward side of the mountain to sea level, water vapor content of the parcel is HIGHER before it began to rise over the mountain.
(b): At 6000 feet the parcel starts descending and the temperature at this height is 10 and from there it starts to descent down the leeward side.
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