Table of Contents
International Journal of Atmospheric Sciences
Volume 2013, Article ID 162541, 19 pages
http://dx.doi.org/10.1155/2013/162541
Research Article

Analysis of Convective Thunderstorm Split Cells in South-Eastern Romania

1Department of Atmospheric Physics, Faculty of Physics, University of Bucharest, P.O. Box MG-11, 077125 Bucharest, Romania
2National Meteorological Administration, Bucuresti-Ploiesti Avenue, No. 97, 013686 Bucharest, Romania

Received 29 August 2012; Revised 21 November 2012; Accepted 22 November 2012

Academic Editor: Helena A. Flocas

Copyright © 2013 Daniel Carbunaru et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mesoscale configurations are analysed associated withthesplitting process of convective cells responsible for severe weather phenomena in the south-eastern part of Romania. The analysis was performed using products from the S-band Doppler weather radar located in Medgidia. The cases studied were chosen to cover various synoptic configurations when the cell splitting process occurs. To detect the presence and intensity of the tropospheric jet, the Doppler velocity field and vertical wind profiles derived from radar algorithms were used. The relative Doppler velocity field was used to study relative flow associated with convective cells. Trajectories and rotational characteristics associated with convective cells were obtained from reflectivity and relative Doppler velocity fields at various elevations. This analysis highlights the main dynamic features associated with the splitting process of convective cells: the tropospheric jet and vertical moisture flow associated with the configuration of the flow relative to the convective cells for the lower and upper tropospheric layers. These dynamic characteristics seen in the Doppler based velocity field and in the relative Doppler velocity field to the storm can indicate further evolution of convective developments, with direct implications to very short range forecast (nowcasting).