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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, 11–16, 2010
https://doi.org/10.5194/angeo-28-11-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 11–16, 2010
https://doi.org/10.5194/angeo-28-11-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 08 Jan 2010

ANGEO Communicates | 08 Jan 2010

Role of mixed precipitating cloud systems on the typhoon rainfall

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

Abstract. L-band wind profiler data are utilized to diagnose the vertical structure of the typhoon precipitating cloud systems in Taiwan. For several typhoons, a pronounced bright band (BB) around 5 km is commonly observed from the observation. Since strong convection within typhoon circulation may disturb and/or disrupt the melting layer, the BB shall not appear persistently. Hence, an understanding of the vertical structure of the BB region is important because it holds extensive hydrometeors information on the type of precipitation and its variability. Wind profiler observational results suggest that the mixture of convective and stratiform (embedded type) clouds are mostly associated with typhoons. In the case of one typhoon, BB is appeared around 5.5 km with embedded precipitation and also BB height of 1 km higher than ordinary showery precipitation. This is evident from the long-term observations of wind profiler and Tropical Rainfall Measuring Mission. The Doppler velocity profiles show hydrometers (ice/snow) at 6 km but liquid below 5 km for typhoons and 4 km for showery precipitation. In the BB region the melting particles accelerations of 5.8 ms−1 km−1 and 3.2 ms−1 km−1 are observed for typhoon and showery precipitation, respectively.

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