mber, the vertical temperature profiles show the temperature of the surrounding
ID: 3307491 • Letter: M
Question
mber, the vertical temperature profiles show the temperature of the surrounding air twough which parcels of air can nmove. For the tollewin feet and that the SAR is 3.0 F/100O feet g questions, assume thalt the DAR i 5 5Vrnoo 2- A parcel of air with an initial temperature of 55 F begins to rise in Localion A.The LC of the parcel is 2000 feet. With a red (or labeled) line, caretully draw the temperature decrease of this parcel of air as it rises to 8000 feet. Be sure to consider the LCL, and the DAR and SAR (a) Describe the stability pattern of this parcel of air. What is the general name for the change observed in the verucal temperature profile between 2000 and 3000 feet? (b) Does the parcel of rising air become highly stable or highly unstable between 2000 and 3000 feet? Why? (e) f air with an initial temperature of 80°F begins to rise in Location B. The LCLExplanation / Answer
(a) given that the level of condensation is 1000 feet altitude. So, up to the level of condensation, the air parcel is cooled at the rate of DALR. So the environmental lapse rate in this layer is greater than the DALR and thus the layer becomes absolutely unstable. Above the level of condensation, the air parcel is cooled by SALR. This layer is conditionally unstable. The top of the bulging cloud at 3500 is the top of rising air and it has now cooled to a temperature equal to its surroundings. The air parcel encounters difficulty in rising above this level because of the stable subsidence inversion directly above it.
This along with the downward air motions of the high pressure system will limit the cloud from building very high above their bases.
(b) It is atmospheric thermocline, in the tropopause it is a conditionally unstable layer.
(c) The parcel is conditionally unstable between 1000 and 1500 f. In this case, the LCL is at 1000 feet above this level. Above this level, the air parcel is cooled by MALR. so this layer is conditionally stable.
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