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・ Fujiwara no Yoritada
・ Fujiwara no Yoshifusa
・ Fujiwara no Yoshikado
・ Fujiwara no Yoshikane
・ Fujiwara no Yoshimi
・ Fujiwara no Yoshisuke
・ Fujiwara no Yoshitaka
・ Fujiwara no Yoshitsugu
・ Fujiwara no Yukinari
・ Fujiwara Nobuzane
・ Fujiwara Opera
・ Fujiwara Seika
・ Fujiwara Takanobu
・ Fujiwara, Mie
・ Fujiwara-kyō
Fujiwhara effect
・ Fujiya & Miyagi
・ Fujiya Co.
・ Fujiya Hotel
・ Fujiyama (roller coaster)
・ Fujiyama Station
・ Fujiyamashita Station
・ Fujiyoshida, Yamanashi
・ Fujizakura Yoshimori
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Fujiwhara effect : ウィキペディア英語版
Fujiwhara effect

The Fujiwhara effect, sometimes referred to as Fujiwara interaction or binary interaction, is when two nearby cyclonic vortices orbit each other and close the distance between the circulations of their corresponding low-pressure areas. The effect is named after Sakuhei Fujiwhara, the Japanese meteorologist who initially described the effect. Binary interaction of smaller circulations can cause the development of a larger cyclone, or cause two cyclones to merge into one. Extratropical cyclones typically engage in binary interaction when within of one another, while tropical cyclones typically interact within of each other.
==Description==

When cyclones are in proximity of one other, their centers will begin orbiting cyclonically (counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere) about a point between the two systems due to their cyclonic wind circulations. The two vortices will be attracted to each other, and eventually spiral into the center point and merge. It has not been agreed upon whether this is due to the divergent portion of the wind or vorticity advection. When the two vortices are of unequal size, the larger vortex will tend to dominate the interaction, and the smaller vortex will orbit around it. The effect is named after Sakuhei Fujiwhara, the Japanese meteorologist who initially described it in a 1921 paper about the motion of vortices in water.

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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