Articles | Volume 6, issue 3
Nat. Hazards Earth Syst. Sci., 6, 397–405, 2006

Special issue: Advances in radar, multi-sensor and hydrological modelling...

Nat. Hazards Earth Syst. Sci., 6, 397–405, 2006

  23 May 2006

23 May 2006

Analysis of severe convective events from two operational dual polarisation doppler radars

M. Celano1,2, P. P. Alberoni1, V. Levizzani3, and A. R. Holt4 M. Celano et al.
  • 1ARPA-SIM, viale Silvani 6, 40122, Bologna, Italy
  • 2Universit√† degli Studi di Ferrara, Dip. di Fisica, via Saragat 1, 44100 Ferrara, Italy
  • 3ISAC-CNR, via Gobetti 101, 40129 Bologna, Italy
  • 4University of Essex, Dept. of Math. Sciences, Colchester, CO4 3SQ, UK

Abstract. The recent gradual increase in the use of polarimetric radars prompts for possible improvements in the estimation of precipitation and the identification of the prevailing hydrometeor type. An analysis of different convection episodes (20 May 2003, 4 and 7 May 2004) is conducted in order to explore the attenuation effects at C band and their consequences on the rainfall field estimation using two polarimetric radars in the Po Valley, Italy, located about 90 km apart. A hydrometeor classification scheme, developed at the National Severe Storms Laboratory (NSSL), is used to detect the microphysical structure of the different cloud systems. The work is focused on the reconstruction of the 3-D organisation of the convective events, highlighting how the two radar systems ''see'' the storms from different points of view. Furthermore, the two distinct observations and the temperature field are used to correct the effect of attenuation.