WELCOME

INDEX

nINTRODUCTION

nGLOBAL PRESSURE BELTS

nEQUATORIAL LOW-PRESSURE BELT

nSUB-TROPICAL HIGH PRESSURE BELTS

nSUB POLAR LOW- PRESSURE BELTS

nCORIOLES EFFECT

nPOLAR HIGH PRESSURE BELTS

Power point presentation
 on
Global Pressure Belts

Presented

By

LAKSHMI DAS

Reg: no. 16914371011

Social Science

M.A.E.T.Training college 

Nettayam

Global Pressure 

Belts

nThe surface of the earth is divided into seven pressure belts based on the similarities and variations in the atmospheric pressure. They are known as Global pressure belts.

Equatorial Low- Pressure Belt

nPlaces near the equator experience more heat because the sun’s rays fall vertically on them throughout the year. Hence, the air gets heated and it expands and rises towards the upper layers. Moisture content of the atmosphere will be high as the region are located near the cost. Due to these reasons the pressure in the equatorial regions is low. These regions are known as the Equatorial Low-Pressure Belt

Sub- Tropical  High Pressure Belts

nAfter reaching considerable heights the air that ascends from the equatorial low-pressure belts, cools and flows in the direction of the poles. This cool and dense air descends around the sub- tropical areas (around 30onorth and 30o south). The cold air masses from Polar regions may also reach these regions, because of the effect of the rotation of the earth.

Sub Polar Low- Pressure Belts

nLow-pressure belts formed around 60o north and south latitudinal regions are sub Polar Low Pressure Belts. In the sub polar regions, where the effects of Carioles Force is move, the air is thrown our. It rises and later subsides in the sub tropical high –pressure belts .This results in the formation of Sub Polar Low Pressure Belts

Corioles Effect

nDue to the rotation of the earth, any object moving on its own on the surface of the earth is deflected towards the right in the northern hemispheres and towards the left in the Southern hemisphere. The coriolis Effect is that which causes this change in direction.

Polar High –Pressure Belts

nThe air in the Polar regions is cold and dense. It also locks moisture. Therefore, the air pressure is more in these regions. This results is the formations of polar High Pressure Belts.

Thankyou

Assignment 

Innovative Lesson Plan