Tag: in search of the source of wind

The planetary winds which blows between the tropics are termed as trade wind. Trade wind move out from the sub tropical high-pressure belt towards equators. In different sections of their path, the condition of temperature, humidity, and density is not uniform. 

Tropical cyclone: it is a rapidly rotating storm with a low pressure centre, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. The low pressure is due to rising warm air.

Monsoon is an example of seasonal wind. It is a seasonal modification of general planetary wind system. In summer, there is warm moist wind blowing from ocean towards land, while during the winter months a cold and dry wind originating on the land blows seaward. Monsoon winds are most powerful in India and China. In summer monsoon winds are known as south west monsoon, it is moist and brings a lot of rain. In winter it is known as north-east monsoon. As it comes from interior it is cold and dry. 

• The polar easterlies (also Polar Hadley cells) are the dry, cold prevailing winds that blow from the high-pressure areas of the polar highs at the North and South Poles towards low-pressure areas within the Westerlies at high latitudes.
• When air moves near the poles, cold temperatures shrink the air.
• Cold air subsides at the pole creating the high pressure, forcing a southerly (northward in the southern hemisphere) outflow of air towards the equator.
• This outflow is then deflected westward by the Coriolis effect, therefore these prevailing winds blow from the east to the west.
• Since the winds originate in the east, they are then known as easterlies.
• Unlike the westerlies in the middle latitudes, the polar easterlies are often weak and irregular.

Typhoon,

Easterly,

Northern Hemisphere,

West- East