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
Planetary winds are winds that blow out from high pressure belt to low pressure belts.
There are three types of 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 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.
INSTRUMENTS FOR WIND
DIRECTION- EAST,WEST,NORTH & SOUTH
UNIT MEASUREMENT IS IN KM PER HOUR