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The Intertropical Convergence Zone (ITCZ), is the region that circles the Earth, near the equator, where the trade winds of the Northern and Southern Hemispheres come together. The intense sun and warm water of the equator heats the air in the ITCZ, raising its humidity and causing it to rise. As the air rises it cools, releasing the accumulated moisture in an almost perpetual series of thunderstorms.

Variation in the location of the ITCZ drastically affects rainfall in many equatorial nations, resulting in the wet and dry seasons of the tropics rather than the cold and warm seasons of higher latitudes. Longer term changes in the ITCZ can result in severe droughts or flooding in nearby areas.


This image is a combination of cloud data from NOAA’s newest Geostationary Operational Environmental Satellite (GOES-11) and color land cover classification data. The ITCZ is the band of bright white clouds that cuts across the center of the image.


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current13:45, 12 June 2005Thumbnail for version as of 13:45, 12 June 20052,772 × 1,250 (1.54 MB)Gustavo Carrancio~commonswikiPic from File history Nasa photo with no especific Copyright

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