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Radius of maximum wind
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Radius of maximum wind : ウィキペディア英語版
Radius of maximum wind

The radius of maximum wind (RMW) is the distance between the center of a cyclone and its band of strongest winds. It is a parameter in atmospheric dynamics and tropical cyclone forecasting.〔(【引用サイトリンク】url=http://www.nwas.org/ej/hsu/hsu_babin_2005.pdf )〕 The highest rainfall rates occur near the RMW of tropical cyclones. The extent of a cyclone's storm surge and its maximum potential intensity can be determined using the RMW. As maximum sustained winds increase, the RMW decreases. Recently, RMW has been used in descriptions of tornadoes. When designing buildings to prevent against failure from atmospheric pressure change, RMW can be used in the calculations.〔Donald W. Burgess and Michael A. Magsig. (Understanding WSR-88D Signatures for the 3 May 1999 Oklahoma City Tornado. ) Retrieved on 2007-03-18.〕
==Determination==
The RMW is traditionally measured by reconnaissance aircraft in the Atlantic basin.〔 It can also be determined on weather maps as the distance between the cyclone center and the system's greatest pressure gradient. Using weather satellite data, the distance between the coldest cloud top temperature and the warmest temperatature within the eye, in infrared satellite imagery, is one method of determining RMW. The reason why this method has merit is that the strongest winds within tropical cyclones tend to be located under the deepest convection, which is seen on satellite imagery as the coldest cloud tops.〔 Use of velocity data from Doppler weather radar can also be used to determine this quantity, both for tornadoes and tropical cyclones near the coast.

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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