What are wind pressure belts?

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Winds always blow from high pressure to low pressure. So the winds from subtropical region blow towards the Equator as Trade winds and another wind blow towards Sub-Polar Low-Pressure as Westerlies. These belts located between 60° and 70° in each hemisphere are known as Circum-Polar Low- Pressure Belts.

How pressure belts are formed?

Formation. The air from sub-polar low pressure belts after saturation becomes dry. This dry air becomes cold while moving towards poles through upper troposphere. The cold air (heavy) on reaching poles subsides creating a high pressure belt at the surface of earth.

How do pressure belts affect surface winds?

On the surface, wind moves away from high pressure (High) and toward low pressure (Low). Convergence occurs near the equator (winds blow in towards one another) and Divergence occurs under the descending air that forms high-pressure belts.

What is pressure belt explain with diagram?

This zone is marked by ascent of warm Subtropical air over cold polar air blowing from poles. Due to earth’s rotation, the winds surrounding the Polar region blow towards the Equator. Centrifugal forces operating in this region create the low pressure belt appropriately called Circumpolar Low Pressure Belt.

What are the different types of pressure belts?

On the earth’s surface, there are seven pressure belts. They are the Equatorial Low, the two Subtropical highs, the two Subpolar lows, and the two Polar highs. Except for the Equatorial low, the others form matching pairs in the Northern and Southern Hemispheres.

What are types of wind?

This classification is based on the periodicity of occurrence and location of occurrence.

Primary Wind or Planetary Wind.
Secondary Wind or Periodic Wind.
Tertiary Wind or Local Wind.
Trade Winds.
The Westerlies.
Polar Easterlies.
Monsoon Winds.
Land Breeze and Sea Breeze.

What causes wind?

Wind is caused by uneven heating of the earth’s surface by the sun. Because the earth’s surface is made up of different types of land and water, it absorbs the sun’s heat at different rates. One example of this uneven heating is the daily wind cycle.

What is pressure and wind system?

These areas are called low pressure systems. Places where the air pressure is high, are called high pressure systems. A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet.

What are the 7 pressure belts?

Earth’s Pressure Belts

Equatorial low pressure belt.
Sub-Tropical high pressure belt – Northern hemisphere.
Sub-Tropical high pressure belt – Southern hemisphere.
Sub-polar low pressure belt – Northern hemisphere.
Sub-polar low pressure belt – Southern hemisphere.
Polar high pressure belt – Northern hemisphere.

What are the 4 types of wind?

Types of Wind – Planetary, Trade, Westerlies, Periodic & Local Winds.

What are the 3 types of winds?

Broadly, there are three types of winds – prevailing winds, seasonal winds and local winds….Trade Winds

These types of winds blow from sub-tropical high pressure belts to equatorial low pressure belts.
Since the trade winds mostly blow from the east, they are also known as the Tropical easterlies.

What is pressure belt class 9?

Answer: The distribution of atmospheric pressure across the latitudes is termed as global horizontal distribution of pressure and represented as pressure belts, e.g. Equatorial low, Sub-Tropical High, Circum-polar low and Polar High pressure belts.

What are the characteristics of high pressure belt?

• The air in this belt have high vapour content . • Earth rotation is maximum near equator because of which air pushes in all directions. • Due to calm air movements in this pressure belt, is called Doldrums. 5. • 2.Sub-Tropical High Pressure Belts: • It extends 35°N and 35°S of Equator.

How do global wind and pressure belts affect the atmosphere?

Global Wind and Pressure Belts as a Response to the Unequal Heating of the Atmosphere As you will remember from lesson 1, Equatorial Regions receive more direct solar radiation than do polar areas. Water maintains its heat, while, land heats and cools in a 1 day cycle.

What is the global pattern of pressure belts?

Global Pattern of Pressure Belts An imaginary uniform Earth with idealized zonal (continuous east to west) pressure belts. The real Earth has disruptions in its zonal pattern caused by large land masses. These disruptions break up pressure zones into semi-permanent high and low pressure cells. The most permanent belts are found over the oceans

What are the characteristics of Equatorial low pressure belt?

Equatorial Low Pressure Belt: • It extends 10°N and 10°S of Equator. • Low pressure is present in this layer due to high temperature near equator. • The air in this belt have high vapour content . • Earth rotation is maximum near equator because of which air pushes in all directions.