Question

What are pressure belts

Answer 1

Pressure belts are seasonally identical horizontal pressure variations created in the earth’s atmosphere just above the earth’s surface due to seasonal and spatial variation of energy received by the earth at different places. [Energy received determines the pressure exerted by the atmosphere at a place and variations in pressure exerted determines the direction and velocity of the wind.]

Spatial variation is due to the Geoid (Onion shape) shape of the earth, i.e. the tropics receive maximum energy as they are more or less perpendicular to the sun’s rays whereas the polar regions receive minimum as they make an angle far lesser than 90 degree with the sun’s rays. The temperate regions receive energy somewhere in between the tropics and the polar regions.


Seasonal variations are due to revolution of the earth on a tilted axis around the sun. The dynamic behaviour of pressure belts (position of the pressure belts oscillating between certain latitudes) is due to seasonal variation in insolation (sun’s energy received).

Answer 2

Answer:

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Horizontally, the distribution of atmosphere pressure is not the same all over the world .Different parts of the Earth are heated unequally . Like the heat zones , we also have four major pressure belts around the earth.

Two factors that creates pressure belts are -Temperature and rotation of the earth .

$\huge\mathcal\color{</strong><strong>red</strong><strong>}</strong><strong>Types</strong><strong>\:</strong><strong>of</strong><strong>\:</strong><strong>Belts</strong><strong>!!$

☆The Equatorial Low

⠀Pressure belt ⠀⠀⠀⠀⠀⠀⠀⠀(5°N to 5°S )

☆ The Sub - tropical High ⠀( 30°N to 35°N )

⠀Pressur belt ⠀⠀⠀⠀⠀⠀and ( 30°S to 35°S )

☆ The Sub - Polar Low⠀⠀⠀( 60°N to 65°N )

⠀Pressure belt ⠀⠀⠀⠀⠀ and ( 60°S to 64°S )

☆ The Polar high ⠀⠀⠀⠀⠀⠀⠀( 85°N to 90°N )

⠀ Pressure belt⠀⠀⠀⠀⠀and ( 85°S to 90°S )