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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 23, issue 5
Ann. Geophys., 23, 1673–1683, 2005
https://doi.org/10.5194/angeo-23-1673-2005
© Author(s) 2005. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 23, 1673–1683, 2005
https://doi.org/10.5194/angeo-23-1673-2005
© Author(s) 2005. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 Jul 2005

28 Jul 2005

VHF/UHF radar observations of tropical mesoscale convective systems over southern India

K. Kishore Kumar1, A. R. Jain2, and D. Narayana Rao3 K. Kishore Kumar et al.
  • 1Space Physics Laboratory, Vikram Sarabhai Space Center, Trivandrum 695022, India
  • 2National Physical Laboratory, New Delhi, India
  • 3National MST Radar Facility, P.B. 123, Tirupati-517502, India

Abstract. Several campaigns have been carried out to study the convective systems over Gadanki (13.5° N, 79.2° E), a tropical station in India, using VHF and UHF radars. The height-time sections of several convective systems are investigated in detail to study reflectivity, turbulence and vertical velocity structure. Structure and dynamics of the convective systems are the main objectives of these campaigns. The observed systems are classified into single- and multi-cell systems. It has been observed that most of the convective systems at this latitude are multi-cellular in nature. Simultaneous VHF and UHF radar observations are used to classify the observed precipitating systems as convective, intermediary and stratiform regions. Composite height profiles of vertical velocities in these regions were obtained and the same were compared with the profiles obtained at other geographical locations. These composite profiles of vertical velocity in the convective regions have shown their peaks in the mid troposphere, indicating that the maximum latent heat is being released at those heights. These profiles are very important for numerical simulations of the convective systems, which vary significantly from one geographical location to the other.

Keywords. Meteorology and atmospheric dynamics (Mesoscale meteorology; Convective processes) – Radio science (Remote sensing)

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