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November 28, 2014

Homework Help: Physical Geography

Posted by Chaseone on Friday, April 1, 2011 at 4:23pm.

Will someone please check my work? I cannot seem to post the map that is in the workbook.

Assume that a parcel of air is forcd to rise up and over a 4000 meter high mountain.The initial temp of the parcel at sea level is 30*c, and the LCL of the parcel is 2000 meters. The DAR is 10*c/1000m and the SAR is 6*c/1000m. 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 windward side of the mountain:
(a) 1000m 20 C (b) 2000m 10 C (c) 4000m-2 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? 38 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)? Latent heat

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? Increasing

(b) Why? when the temperature of a parcel of air decreases, its relative humidity increases

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? Decreasing

b) Why? when the temperature of a parcel of air increases, its relative humidity decreases

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