VALLEY CLIMATES

Question 1

Anabatic
wind

Answer 1

A local wind which blows up the length of the valley during the
day, because of rising of warm air.

Question 2

Downslope
wind

Answer 2

A local wind which blows down the sides of a valley during the
night.

Question 3

Frost pocket

Answer 3

An area of cold air reaching a dew point temperature below
freezing at the bottom of the valley. May occur on clear, calm
winter evenings.

Question 4

Katabatic wind

Answer 4

A local wind which blows down the slope of a valley during the
night, because of cold subsiding air.

Question 5

Microclimate

Answer 5

The climate of a small area that is different to the climate of its
surroundings. Three factors contribute to valley microclimate.

Question 6

Radiation fog

Answer 6

Fog that forms at night under clear, calm conditions. Fog
caused by condensation in air that has cooled to dew point
temperature as a result of the loss of heat though terrestrial
radiation.

Question 7

Shadow zone

Answer 7

The part of the valley or slope that does not receive any
sunlight.

Question 8

Slope Aspect

Answer 8

Refers to the direction to which a slope faces.

Question 9

Temperature
inversion

Answer 9

An increase of temperature with altitude rather than the usual
decrease.

Question 10

Thermal belt

Answer 10

Warm layer of air midway up a valley with cold air below as a
result of inversion of temperature.

Question 11

Upslope wind

Answer 11

A local wind which blows up the sides of a valley during the
day.