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The trade winds or easterlies are permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere , strengthening during the winter and when the Arctic oscillation is in its warm phase.
The trade winds (also called trades) are the prevailing pattern of easterly surface winds found in the tropics near the Earth's equator, [4] equatorward of the subtropical ridge. These winds blow predominantly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere. [5]
The trade winds act as the steering flow for tropical cyclones that form over the world's oceans. [32] Trade winds also steer African dust westward across the Atlantic Ocean into the Caribbean, as well as portions of southeast North America. [33] A monsoon is a seasonal prevailing wind that lasts for several months within tropical regions.
The westerlies (blue) and trade winds (yellow and brown) The general atmospheric circulation. Trade winds (red), westerlies (white) and the South Pacific anticyclone (blue) [1] The westerlies, anti-trades, [2] or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude.
Besides the westerlies, and trade winds, the large surfaces of land also effect the wind, causing cyclones, hurricanes and other deviations to the normal direction of trade wind File usage The following 10 pages use this file:
The atmospheric circulation pattern that George Hadley described was an attempt to explain the trade winds. The Hadley cell is a closed circulation loop which begins at the equator. There, moist air is warmed by the Earth's surface, decreases in density and rises.
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English: Edmond Halley's map of the trade winds, from (1686). "An Historical Account of the Trade Winds, and Monsoons, Observable in the Seas between and near the Tropicks, with an Attempt to Assign the Phisical Cause of the Said Wind". Philosophical Transactions of the Royal Society 16: 153-168.