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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 28, issue 1
Ann. Geophys., 28, 141–147, 2010
https://doi.org/10.5194/angeo-28-141-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 141–147, 2010
https://doi.org/10.5194/angeo-28-141-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 18 Jan 2010

ANGEO Communicates | 18 Jan 2010

Wind profiler observations on orographic effects of typhoon wind structure modification over Taiwan (120.38° E, 22.6° N)

C. J. Pan1, K. Krishna Reddy2, H. C. Lai3, S. S. Yang1, and C. J. Wong4 C. J. Pan et al.
  • 1Institute of Space Science, National Central University, Taiwan
  • 2Department of Physics, Yogi Vemana University, Kadapa, India
  • 3Dept. of Eng. & Manag. of Advanced Tech., Chang Jung Christian University, Taiwan
  • 4School of Physics, Universiti Sains Malaysia, Malaysia

Abstract. The interaction of the storm circulation with the Central Mountain Range (CMR) of Taiwan is studied with a wind profiler located at the leeside during the invasions of two (Kaemi (200605) and Bopha (200609)) typhoons. The moderate typhoon Kaemi upgraded from a tropical depression on 21 July 2006. It then was made landfall at 15:45 UTC on 24 July 2006 near Cheng-Kung. The weak typhoon Bopha formed at about 12:00 UTC on 5 August 2006 and also landed near Cheng-Kung at around 19:20 UTC on 8 August. A new finding from both typhoons is the vortex splitting into upper and lower parts with the two typhoons that have passed the observation site nearly. For the typhoon Kaemi, demarcation height of the upper-level vortex and lower level is at 2.8 km and passed the site about 3 h earlier than the low-level one. For the typhoon Bopha, the center of the lower-level vortex at 3.5 km locates to the north of the upper-level one at 5.2 km. The re-organization of the split vortexes is found in typhoon Kaemi but not for typhoon Bopha.

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