Chapter 9 Stability

Question 1

Adiabatic process

Answer 1

Were heat doesn’t enter or leave the system

Question 2

Dalr

Answer 2

Dry adiabatic lapse rate
Temp of a air parcel that decreases with height
When it is made to ascend adiabatically

Question 3

Elr

Answer 3

Environmental lapse rate
It is the actual lapse rate existing in atmosphere
In isa it is 6.5 /1km

Question 4

Salr

Answer 4

Saturated adiabatic lapse rate
It is not constant like dalr
It is when a saturated air parcel is lifted adiabatically
The extra water vapour condenses and latent heat is released.

Question 5

What is stability and instability and netural

Answer 5

Is the air parcel moves up and sinks back down it is stable
If not and just moves up then it is unstable and if it just stays at the new level of them is it netural

Question 6

Conditional instability

Answer 6

When dalr> Elr > salr
It is unstable for saturated air and stable for dry air

Question 7

Latent instability

Answer 7

It is when the stable parcel of air becomes unstable when it is forced to ascend by hidden instability

Question 8

Real latent

Answer 8

When the energy required is less than the air parcel to rise up

Question 9

Pseudo Latent

Answer 9

When the force needed to left the air parcel is more than energy released

Question 10

For potential instability to occur

Answer 10

The RH should be high is low levels and low in higher lvl

Question 11

Dry air is stable when

Answer 11

Dalr> elr

Question 12

Saturated air to be stable

Answer 12

Salr> elr

Question 13

For absolute unstable

Answer 13

Elr > dalr

Question 14

Absolute stable

Answer 14

Salr> dalr > elr