Consider the following statements 1 When an air parcel is pushed up first dry adiabatic cooling take...........

Geography Atmosphere

Consider the following statements:

1. When an air parcel is pushed up, first dry adiabatic cooling take place and then wet adiabatic cooling take place.

2. During dry adiabatic cooling, air contains no water vapour.

3. The rate of dry adiabatic cooling is constant across the world, while rate of wet adiabatic cooling constantly changes.

Which of the above statements are correct?

1&2 only

2&3 only

1&3 only

All of the above

During dry adiabatic cooling air contains water vapour and during wet adiabatic cooling air contains condensed water.
Dry adiabatic cooling is a physical phenomenon which occurs due to change in density as the air parcel moves up. The rate is constant across the world. On contrary, during wet adiabatic cooling, water starts condensing. Due to condensation, latent heat is released which reduces the net rate of cooling. More the heat is released, slower the rate of cooling becomes. That’s why it is not constant.