Trade winds are the winds that blow towards the equator from the Northeast in Northern Hemisphere and from the Southeast in Southern Hemisphere. Thus these winds are called tropical easterlies. These winds are generally confined to the region between  30°N and 30°S of the earth's surface. 

Dandelions in Wind

This article will help you in understanding Trade winds in an easy manner that will help you in preparing for UPSC and other state Civil Service exams. Before going any further, let's recall some basics we have known since school. 

What are winds: 

Wind is moving air and is caused by differences in air pressure within our atmosphere. Air under high pressure moves toward areas of low pressure. The greater the difference in pressure, the faster the air flows.

Trade Winds

Now we know that difference in air pressure creates wind. See at the equator the sun warms the Water and Land more than any place of our planet. So this intense heat makes the air to rise up and they travel towards the poles. This is actually called low pressure system. Likewise air from Poles which are cold and high pressure travel towards the equator.

Also let's know about prevailing winds. These are winds over a single direction. Generally these prevailing winds blow from east to west because of Coriolis effect (A force caused by rotation of earth).

Trade winds

Trade winds are prevailing winds which are predictable by nature and thus these were used by ships in the ocean to sail across continents. These winds blow from East but due to the influence of Coriolis force they flow from the direction of North east in the Northern Hemisphere and from South East in the Southern Hemisphere.