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Mesoscale meteorology : ウィキペディア英語版
Mesoscale meteorology

Mesoscale meteorology is the study of weather systems smaller than synoptic scale systems but larger than microscale and storm-scale cumulus systems. Horizontal dimensions generally range from around 5 kilometers to several hundred kilometers. Examples of mesoscale weather systems are sea breezes, squall lines, and mesoscale convective complexes.
Vertical velocity often equals or exceeds horizontal velocities in mesoscale meteorological systems due to nonhydrostatic processes such as buoyant acceleration of a rising thermal or acceleration through a narrow mountain pass.
==Subclasses==
Mesoscale Meteorology is divided into these subclasses:
* Meso-gamma 2–20 km, deals with phenomena like thunderstorm convection, complex terrain flows (at the edge to microscale, also known as storm-scale)
* Meso-beta 20–200 km deals with phenomena like sea breezes, lake effect snow storms
* Meso-alpha 200–2000 km fronts, deals with phenomena like squall lines, mesoscale convective systems (MCS), tropical cyclones at the edge of synoptic scale
As a note, tropical and subtropical cyclones are classified by National Hurricane Center as synoptic scale rather than mesoscale.〔http://www.nhc.noaa.gov/aboutgloss.shtml〕

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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