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Problem: Describe how the stability of an air mass can be explained concerning the lapse rate.
An air mass over the ocean is lifted and moved inland where it meets a mountain range of altitude 2500 m. The temperature of the air mass at sea level is 30? C, and the dew point is 20° C.
Determine the
(a) elevation at which condensation will begin to take place.
(b) the temperature of the air mass at the top of the mountain range.
(c) Elevation at which freezing of water vapour in the air mass will begin to take place. The dry and saturated adiabatic lapse rates are 10°C/km and 5.5°C/km, respectively. Assume that the lowering of the dew point with altitude follows the saturated adiabatic lapse rate.
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