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Intertropical Convergence Zone
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{{short description|Meteorological phenomenon}} {{redirect|The Calms|other uses|Calm (disambiguation)}} {{redirect|Doldrums|other uses|Doldrums (disambiguation)}} [[File:IntertropicalConvergenceZone-EO.jpg|thumb|350px|The ITCZ is visible as a band of clouds encircling Earth near the Equator.]] The '''Intertropical Convergence Zone''' ('''ITCZ''' {{IPAc-en|Ιͺ|tΚ}} {{respell|ITCH}}, or '''ICZ'''),<ref>{{cite web |url=https://www.weather.gov/jetstream/itcz |title=ITCZ |publisher=[[National Weather Service]]}}</ref> known by sailors as the '''doldrums'''<ref>{{cite EB1911 |wstitle=Doldrums |volume=8 |page=386}}</ref> 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 [[monsoon|monsoonal]] circulation, it is sometimes referred to as a ''[[monsoon trough]]'' (a usage that is more common in Australia and parts of Asia).
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