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Intertropical Convergence Zone - Wikipedia

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The Intertropical Convergence Zone (ITCZ /ɪtʃ/ ITCH, or ICZ),[1] known by sailors as the doldrums[2] or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal equator, though its specific position varies seasonally. When it lies near the geographic equator, it is called the near-equatorial trough. Where the ITCZ is drawn into and merges with a monsoonal circulation, it is sometimes referred to as a monsoon trough (a usage that is more common in Australia and parts of Asia). The ITCZ was originally identified from the 1920s to the 1940s as the Intertropical Front (ITF), but after the recognition in the 1940s and the 1950s of the significance of wind field convergence in tropical weather production, the term Intertropical Convergence Zone (ITCZ) was then applied.[3] The ITCZ appears as a band of clouds, typically thunderstorms, that encircle the globe near the Equator. In the Northe

Intertropical Convergence Zone - Wikipedia Jump to content From Wikipedia, the free encyclopedia Meteorological phenomenon "The Calms" and "Doldrums" redirect here. For other uses, see Calm (disambiguation) and Doldrums (disambiguation) . The ITCZ is visible as a band of clouds encircling Earth near the Equator. Average vertical air velocity at 500 hPa in July. Ascent (negative values) is concentrated close to the solar equator ; descent (positive values) is more diffuse Seasonal variability of the Intertropical Convergence Zone (ITCZ), Congo air boundary (CAB), tropical rainbelt , and surface

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