A radiosonde is launched at Daytona Beach International Airport, and sends back

Question

A radiosonde is launched at Daytona Beach International Airport, and sends back the following data:

Altitude                           Temperature

3000 m                           -18 °C

2000 m                           -10 °C

1000 m                              -2 °C

0 m (surface)                      6 °C

1. The environmental lapse rate (ELR) at the airport between the surface and 3000 m is

A. 8"

B. 6"

C. 9"

D. 10"

2. Based on the ELR, the stability classification of the atmosphere at the airport between the surface and 3000 m is                            [ Select ]

A. conditionally unstable

B. absolutely stable

C. absolutely unstable

3. Based on the stability classification, if, over the airport, rising air reaches the point of saturation below 3000 m, it is likely that

A. cumuliform (convective)

B. stratiform (layered)

4. At the airport, a parcel of air at the surface has a temperature of 6 °C and a dew point temperature of -3 °C. The parcel’s dew point depression at the surface is

A. 9"

B. -3"

C. 3"

D. 6"   

5. The air parcel now rises from the surface, and reaches the point of saturation before reaching 3000 m. Clouds will begin to form at a height of

A. 1125"

B. 375

C. 2052"

D. 3000"

Explanation / Answer

1. ELR is calculated by this formula, (T2-T1)= (H2-H1),

(6-(-18))/3000-0, ELR is therefore 8'' per 1000 meter.

2. absolutely stable

3.Stratiform, stable atmosphere

4.Dew point depression is (T-Td) = 6-(-3) = 9''

5.A 1125,as the dew point is reached betwen 1000m and 2000m

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