W: 'Trade Winds' are persistent and warm moist winds that blow westward from the high pressure zones between 30 degree North and 30 degree South latitude towards the doldrums or the intertropical convergence zone at the equator. They are called Northeasterlies in the Northern Hemisphere and Southeasterlies in the Southern Hemisphere. These winds were first termed as 'Trade Winds' because they used to help the sea-merchants in sailing their ships as the direction of the trade winds remains more or less constant and regular. There are variations in the weather conditions in different parts of trade winds.
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