WINDS

WINDS ARE MOVEMENT OF AIR FROM HIGH PRESSURE TO LOW PRESSURE AREAS.

WIND CAN OCCUR ON A SMALL SCALE AND LARGE SCALE
1.LAND AND SEA BREEZE IS AN EXAMPLE OF SMALL SCALE
2. MONSOON WINDS AND PLANETARY ARE EXAMPLE OF LARGE SCALE.

LAND BREEZE AND SEA BREEZE

land and sea breeze

 

Planetary Winds

Planetary winds are winds that blow out from high pressure belt to low pressure belts.

There are three types of Planetary winds

1.Trade Winds

2.The Westerlies

3.The Easterlies


PLANETARY WINDS

The planetary winds blow in curved/deflected direction due to the rotational of the earth.

The wind deflect to the right in Northern Hemisphere and left to the Southern Hemisphere

Equator is an area of low pressure and the 30◦ N and 30◦S is the high pressure area.

Wind deflect to the right from the equator is called the North East Trade in the Northern Hemisphere

Winds deflect to the left from the equator  is called South East Trade in the Southern Hemisphere.

 

Monsoon Winds

Monsoon winds is another example of large scale wind which occurs on a regional level and blows over large land masses.

Monsoon ‘ mausin’ in arabic means season

The unequal heating and cooling of large land masses and the oceans causes a difference in pressure. This causes in the movement of large scale winds whose direction changes with each season.

Monsoon winds blow over Southern and Eastern Asia and influence the climate in these regions.

NORTH EAST AND SOUTH WEST MONSOON

 

INSTRUMENTS FOR WIND

WIND VANE

DIRECTION- EAST,WEST,NORTH & SOUTH

WIND VANE IS USED TO FIND DIRECTION

ANEMOMETER

UNIT MEASUREMENT IS IN KM PER HOUR

 


ANEMOMETER IS USED TO MEASURE THE SPEED OF THE WIND

 

WIND ROSE

Wind roses summarise the occurrence of winds at a location, showing their strength, direction and frequency.

 

BEAUFORT SCALE

 

The Beaufort Scale is an empirical measure for describing wind speed based mainly on observed sea conditions

 

 

 


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