TABLE C Height (meters) Temperature °C Temperature °C Enviroamental Temperature Stable or difference unstable (Parcel- envirorvment Parcel 7000 6000 5000 4000 3000 2000 1000 Serface 40°C 40°C 0°C Stable
Imagine a parcel of air that has a temperature of 40°C at the
surface and a dew-point temperature of 20°C at the lifting
condensation level. Assume that the environmental lapse rate is
8°C per 1000 meters, the dry adiabatic lapse rate is 10°C per 1000
meters, and the wet adiabatic lapse rate is 6°C/1000 meters. In Table C , record the environmental temperature, the parcel
temperature, and the temperature difference (parcel temperature
minus the environmental temperature), and then determine
whether the atmosphere is stable or unstable at each height. a. What is the height of the lifting condensation level?
b. Does this example describe absolute stability, absolute
instability, or conditional instability?
c. Would you forecast thunderstorms under these
conditions?
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