Fujiwara effect
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This phenomenon occurs when two typhoons approach each other within a distance of 1000 km, causing them to interact and rotate counterclockwise. In the actual movement of typhoons, there are often strong directional winds, so simple rotational motion is not observed, but when the directional winds are weak, mutual motion that is clearly due to this interaction can be seen. The name comes from Fujiwara Sahei, the fifth director of the Central Meteorological Observatory, who first proposed the existence of this rotational motion. Source: Asakura Publishing Dictionary of Laws Information |
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二つの台風が距離1000km以内に接近すると，相互作用が働いて反時計回りに両者が回転する現象．実際の台風の動きでは，強い指向風が存在していることが多いので単純な回転運動はみられないが，指向風が弱い場合には明らかにこの相互作用に基づくと認められる相互運動がみられることがある．名称は，第5代中央気象台長の藤原咲平がこの回転運動の存在をはじめて提唱したことによる．
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