Note on the extratropical transformation of a typhoon in relation with cold outbreaks

  • Mitsuru Sekioka
Article

Summary

In a previous paper [9], the behaviour of a pre-existing front within the velocity field of a typhoon was investigated, considering that the front is a substantial line. Kinematical computations of the undulation and displacement of the pre-existing front was carried out, in relation with the exratropical transformation of typhoons, by using the method newly developed from the Petterssen method of successive approximation-trajectories of air parcels.

In the present paper, using the same kinematical equations, the condition for invasion of the pre-existing front into the typhoon area which is the necessary condition for the extratropical transformation of typhoons in thecomplex type is considered in relation with outbreaks of cold air.

Keywords

Climate Change Waste Water Water Management Water Pollution Velocity Field 

Über die außertropische Transformation eines Taifuns im Zusammenhang mit Kaltluftvorstößen

Zusammenfassung

In einer früheren Arbeit [9] wurde das Verhalten einer vorher existierenden Front im Geschwindigkeitsfeld eines Taifuns untersucht, wobei die Front als substantielle Linie angeschen wurde. Es wurden kinematische Berechnungen der Wellenbildung und der Verlagerung dieser Front im Zusammenhang mit der außertropischen Umwandlung des Taifuns durchgeführt, wobei die jüngst von der Petterssenschen Methode der sukzessiven Approximation der Trajektorien von Luftvolumen abgeleitete Methode angewandt wurde.

In der vorliegenden Arbeit wird unter Verwendung derselben kinematischen Gleichungen die Bedingung für das Eindringen der vorher existierenden Front in das Taifungebiet, was eine notwendige Bedingung für die außertropische Umwandlung eines Taifuns in den “komplexen Typ” darstellt, im Zusammenhang mit Kaltluftvorstößen behandelt.

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References

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Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Mitsuru Sekioka
    • 1
  1. 1.Institute of MeteorologyThe Defense AcademyYokosuka, KanagawaJapan

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