Local weather phenomena

Question 1

what is Anabatic winds?

Answer 1

Anabatic winds arise when a mountain or hillside is exposed to direct sunlight. The surface warms faster than the valley or any opposing shaded slopes. The heated slope warms air in contact with it causing it to expand and rise. This, in turn draws in more cool air from the valley floor or in a circulation pattern like the one shown.

Question 2

what is Katabatic winds?

Answer 2

Katabatic winds occur as a result of rapid radiation of heat from exposed mountain or hill slopes at night. This is particularly true of surfaces which are not covered
with vegetation. Once the slopes have cooled they cool the air in contact with the slope causing it to increase in density and sink. This process draws in more air from above and displaces warmer air in the valley as shown below.