Description: A map from 1916 showing the winds on the earth's surface, and a vertical section of the atmosphere showing circulation. "Since the earth's surface is warmer in the equatorial regions than it is in the temperate and polar regions, the air is expanded and its upper parts flow off to the north and south towards the poles. At the same time the cooler air at the surface of the earth on the north and south of the equatorial calm belt moves in and forces the warm air to higher levels. This is the cause of the trade winds. [...] If the air should continue to move toward the Equator without any return currents, all the air would soon be piled up in one belt around the globe. But the air that moves upward in the belt of calms turns to the north and south and flows back over the trade winds. These upper currents are the anti-trade winds. [...] When the air of the anti-trades reaches the north and south limits of the trades, it descends to the earth in calm belts, known as the horse latitudes. These lie between 30° and 35° north latitude and between 30° and 35° south latitude." — Brigham & McFarlane, 1916, p. 259.
Place Names: A Complete Map of Globes and Multi-continent, win
ISO Topic Categories: climatologyMeteorologyAtmosphere
Keywords: Winds on the Earth's Surface, meteorological, kClimate, winds, climatologyMeteorologyAtmosphere, Unknown, 1916
Source: Albert Perry Brigham & Charles T. McFarlane, Essentials of Geography (New York, NY: American Book Company, 1916) 259
Map Credit: Courtesy the private collection of Roy Winkelman |
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