The environmental lapse rate for an area is 7 ° C/1000m, the starting temperatur

Question

The environmental lapse rate for an area is 7°C/1000m, the starting temperature at the surface is 30°C, and the dew-point temperature is 10°C. Answer the following questions.

1. Is this a stable, unstable, or conditionally unstable atmosphere?

         2. Does it matter whether the parcel of air is saturated or not? Why or why not?

         3. At 1000m, what is the temperature of the environment? The air parcel?

         4. At 2000m, what is the temperature of the environment? Of the air parcel?

         5. At 3000m, what is the temperature of the environment? Of the air parcel?

         6. At what elevation does the air parcel become saturated and clouds start to form?

Explanation / Answer

1. As the environmental lapse rate is in between the moist and dry lapse rate ,thus it is considered as the case of conditionally unstable atmosphere.

2. Yes, it matters. As the rising vapors get saturated it looses the capability to hold the water vapours and starts to form moist clouds.

3.temperature will be 23 C.

4. at 2000m its temperature will be 16 C

5.At 3000m its temperature will be 9 C.

6. Just below the elevation of 3000m.

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