Wind & Climate. Wind – the horizontal movement of air. Low pressure – warm air rising. High pressure – cold air falling. Winds always blow from high pressure to low pressure. Winds are named for where they come from: Easterly winds come from the east ;
Wind & Climate
Wind – the horizontal movement of air.
Low pressure – warm air rising.
High pressure – cold air falling.
Winds always blow from highpressure to low pressure.
Winds are named for where they come from:
Easterly winds come from the east;
Southerly winds come from the south;
Sea breezes come from the sea.
Prevailing Wind—Regular, predictable, normal wind direction for an area.
In the day time the land heats faster than the water.
The rising warm air over the land creates a low pressure.
The water is cooler, the falling cool air creates a high pressure.
Sea Breeze – winds blow from the sea (high) to the land (low).
In the night time the land loses heat much faster than the water.
The falling air over the land creates a high pressure.
The water is warmer, the rising warm air creates a low pressure.
Land Breeze – winds blow from the land (high) to the water (low).
Winds and Pressure Belts
Look at Figure 4.10 on page 63.
This is caused by the rotation of the earth.
Wind & Temperature
Some prevailing winds bring warm air from the south.
Some winds bring cold air from the north.
The affect on temperature varies with seasons as well.
Wind off the land in summer is usually warm.
(Land heats up faster)
However, in the winter wind off the
landis usually cold. (Land cools off faster)
Types of Rain
Winds from the ocean are often moist and usually bring more rain.
Winds from the land are often dry and usually bring less rain.