Answers to Questions

on Adiabatic Processes

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1A. The temperature would be minus 6 degrees C.

2A. Its temperature would be 20 degrees C.

3A. The temperature would be 21.5 degrees C.

3A1. The temperature of the rising air would be 18 degrees C, cooler than the still air; the dry adiabatic lapse rate is greater then the environmental lapse rate.

4A.  If the temperature of the parcel of air decreases, the relative humidity increases.  This is a KEY point.  If you did not answer this correctly, you really should go back and review the explanation of relative humidity.

5A. absorbed

6A. released

7A. The temperature at 3000 meters will be approximately 7 degrees C.  The Saturated adiabatic lapse rate is given as 5 deg C/1000 meters, so if you go up 1000 meters, the air will cool off 5 degrees. 12-5=7.

8A.  Air which is subsiding will be increasing in temperature.  If we assume that there is no moisture left in the air (which may not always be the case), the applicable rate is the Dry Adiabatic Lapse Rate.

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07/21/05

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jthorn@mail.sdsu.edu