Explain various pressure belts with the help of a diagram.
Answers
Explanation:
The four major pressure belts of the Earth are:
1.Equatorial Low Pressure Belt
This belt lies between 0°N to 5°N and 0°S to 5°S
Since the vertical rays of the Sun fall on the Earth, the heat is intense and the temperature is high. The air becomes warm and expands.
The convection currents also help to spread the heat to the upper layers of the atmosphere.
This leads to the creation of a low pressure belt in the region. Winds in this pressure belt do not blow at a fast pace and hence this belt is also known as the Belt of Calms or the Belt of Doldrums .
2.Sub tropical high Pressure Belt
This belt is located between 30°N to 35°N and 30°S to 35°S.
As the air at the equator moves toward the Poles, it begins to cool and sink down at about 30° North and South of the Equator. This creates the areas of high air pressure.
Due to the rotation of the Earth, air from 60°N and 60°S also descends in the sub tropical belts.
This pressure belt is also a belt of clams and is referred to as the Horse Latitudes .
3.Circum Polar Low Pressure Belt
This belt is located between 60°N to 65°N and 60°S to 65°S.
It is a zone of two winds; the warm Westerly winds meet the cold polar Easterlies. As the Westerlies are lighter, they rise over the cold polar winds creating a low pressure area.
These belts experience stormy weather and cyclonic activity especially during the winters.
4.Polar High pressure Belts
This belt is located between 85°N to 90°N and 85°S to 90°S.
The Polar Regions experience cold climatic conditions as the rays of the Sun are extremely slanting.
The cold air sinks down giving rise to high pressure areas.
In these places the temperature is permanently low, and the air is dense and heavy. These Polar Regions have permanent ice caps.
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Explanation:
The four major pressure belts of the Earth are:
Equatorial Low Pressure Belt
This belt lies between 0°N to 5°N and 0°S to 5°S
Since the vertical rays of the Sun fall on the Earth, the heat is intense and the temperature is high. The air becomes warm and expands.
The convection currents also help to spread the heat to the upper layers of the atmosphere.
This leads to the creation of a low pressure belt in the region. Winds in this pressure belt do not blow at a fast pace and hence this belt is also known as the Belt of Calms or the Belt of Doldrums.
