The Fujiwara Effect

このところ学校関係者は台風の襲来に振り回されています。今日も学科の会議でとある行事の予定が引き延ばされることが決定されました（正式になってからここにもアップします）。

２つの台風がお互いに影響し、予報が難しいほど複雑な動きをみせることをThe Fujiwara Effectと呼ぶそうです。

気象学でも日本人の活躍はすばらしいのですね。（UG）

The Fujiwara Effect is an interesting phenomenon which can happen when two or more hurricanes form very near each other. In 1921, a Japanese meteorologist named Dr. Sakuhei Fujiwhara determined that two storms will sometimes move around a common center pivot point.

The National Weather Service defines the Fujiwhara Effect as the tendency of two nearby tropical cyclones to rotate cyclonically about each other. Another slightly more technical definition of the Fujiwhara Effect from the National Weather Service is a binary interaction where tropical cyclones within a certain distance (300-750 nautical miles depending on the sizes of the cyclones) of each other begin to rotate about a common midpoint. The effect is also known as the Fujiwara Effect without an ‘h’ in the name. USAToday provides an excellent graphic explaining the Fujiwhara Effect.

http://weather.about.com/od/hurricaneformation/a/Fujiwhara.htm