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convergence zone
A convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions. This create a mass accumulation that eventually leads to a vertical movement and the formation of clouds and precipitation.〔 Large scale convergence, called synoptic scale convergence, provides weather systems such as baroclinic troughs , low-pressure areas and cyclones . Small scale convergence will give from isolated cumulus clouds to large areas of thunderstorms. The inverse of the convergence is the divergence.
== Large scale ==
An example of a convergence zone is the Intertropical Convergence Zone (ITCZ), a low pressure area which girdles the Earth at the Equator. Another example is the South Pacific convergence zone that extends from the western Pacific Ocean toward French Polynesia.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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