Stability and Instability Of Atmosphere Flashcards
DALR = 9.8°C ELR = 6.8 °C atmosphere is
> (a) stable
(b) unstable
(c)indifferent
SALR = 5.5°C, ELR= 4.5°C; atmosphere is
(a) unstable
>(b) stable
(c)indifferent
DALR > ELR > SALR
> (a) conditionally unstable
(b) latently stable
(c) potentially stable
Dry air is unstable when:
(a) ELR=DALR
>(b) ELR>DALR
(c) ELR<DALR
The saturated air is said to be unstable if
(a) SALR=ELR
>(b) SALR<ELR
(c) SALR > ELR
If ELR = SALR = DALR the atmosphere is
(a) Stable
(b) Instable
>(c) Indifferent
DALR means:
> (a)The rate at which temperature of unsaturated parcel of air falls with height when made to ascend adiabatically
(b)The rate at which temp falls with height
(c)The rate at which ascending parcel of saturated air cools
Surface temp. is 30°C. Assuming DALR what is the temperature at 2 km
(a)18°C
>(b) 10°C
(c) 42°C
An Isothermal atmosphere is:
> (a)Stable
(b) Unstable
(c) Neutral
If ELR is less than SALR, the atmosphere is said to be:
(a)Absolutely unstable
(b) Conditionally unstable
>(c) Absolutely stable
DALR is approximately
(a) 5° C/km
(b) 15°C/km
>(c) 10°C/km
SALR at mean sea level is about
(a) 10° C/Km
>(b)5°C/Km
(b)5°F/Km
SALR approaches DALR
(a) at 0°C
(b)at -15°F
>(c)at -40°C
Dry air having a temperature of 35°C on surface when forced to rise adiabatically by 1 km would attain a temperature of
(a) 29 °C
>(b) 25 °C
(c) 45 °C
Inversion in the atmosphere indicates
> (a) Stability
(b)Instability
(c)Neutrality
Inversion is ……… lapse rate
(a) Positive
>(b)Negative
(c)Neutral
Environmental LR can be more than DALR
> (a)True
(b)False
The process which to a large extent determines the vertical distribution of temperature in the atmosphere is
> (a) Adiabatic
(b) Isothermal
(c) Isentropic
Rise in temperature with height is
> (a) Inversion
(b) Lapse
(c) Normal
Inversion is common in
(a) Post Monsoon
(b) Monsoon
>(c) Winters
