Changes

'''Trade winds''', also called ''trades'' are the constant and regular winds that blow in belts on either side of the [[equator]] to about 30 degrees north and south over the three oceans that exist at those [[latitude]]s. They are caused by air moving in to replace the hot, rising air in the permanent low pressure band at the equator—frequently called the doldrums. They move in south-easterly (northern hemisphere) and north-easterly (southern hemisphere) directions instead of due south or north because of the Earth’s rotation.

'''Trade winds''', also called ''trades'' are the constant and regular winds that blow in belts on either side of the [[equator]] to about 30 degrees north and south over the three oceans that exist at those [[latitude]]s. They are caused by air moving in to replace the hot, rising air in the permanent low pressure band at the equator—frequently called the doldrums. They move in south-easterly (northern hemisphere) and north-easterly (southern hemisphere) directions instead of due south or north because of the Earth’s rotation.

Above and below them are belts called the “variables” before bands of prevailing westerlies (called the “Roaring Forties” in the southern hemisphere) occur between about 40 and 60 degrees.

Above and below them are belts called the “variables” before bands of prevailing westerlies (called the “[[Roaring Forties]]” in the southern hemisphere) occur between about 40 and 60 degrees.

Their existence of all these “belts” has had a profound effect on the history of trade, and European exploration through history:

Their existence of all these “belts” has had a profound effect on the history of trade, and European exploration through history: