| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:28 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Relationship between lightning observations and radar rainfall estimates in SE Romania
Authors:
S.BURCEA (1), D. CARBUNARU (1,2)
Affiliation:
(1)National Meteorological Administration, 013686, Bucharest, ROMANIA
(2)University of Bucharest, Faculty of Physics, P.O.Box MG-11, Magurele, Bucharest, Romania
E-mail
sorin.burcea@meteoromania.ro
Keywords:
thunderstorms, radar rainfall, lightning, convection, severe storms
Abstract:
Heavy rainfall and lightning are two very important features of severe storms, and understanding the relation between these could lead to an improved knowledge of the local storm phenomenology. The relationship and correlation between cloud-to-ground lightning (CG) and radar precipitation estimates are presented. We made use of weather radar data and lightning observations in southeastern Romania, the analyzed dataset being composed by 19 thunderstorm days of the 2007 convective season (May-September). Spatial and temporal distributions of lightning activity and rainfall show the time and location of flashes occurrence and rain accumulations. Preliminary results show a good correlation between the radar rainfall estimates and cloud-to-ground flash counts, heavy rain events being accompanied by frequent occurrence of CG flashes. The relation between rainfall and lightning is usually quantified as the Rainfall-Lightning Ratio (RLR), which is an estimator of the convective rain volume per lightning flash. For the analyzed dataset, a good correlation (R=0.91) was found between the aforementioned variables, the daily RLR having an average value of 65.6 10^3 m^3 per CG flash. Another observation is that intense storms tend to produce lower RLR than heavy storms.
Note:
|
|
|
|