UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-24 9:32

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Conference: Bucharest University Faculty of Physics 2011 Meeting


Section: Atmosphere and Earth Science; Environment Protection


Title:
Distribution of heavy precipitation events in Romania between 1980 and 2009


Authors:
Victor Stefanescu (1,2), Sabina Stefan(2), Florinela Georgescu (1)


Affiliation:
(1) National Meterological Administration, sos. Bucuresti-Ploiesti 97, Bucharest, Romania

(2) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Bucharest, Romania


E-mail
victem@gmail.com;victor.stefanescu@meteoromania.ro


Keywords:
Europe,statistics,Grosswetterlagen,air circulation,heavy precipitation,natural hazards


Abstract:
We have analysed the frequency and spatial distribution of heavy precipitation events in Romania that were recorded by meteorological and pluviometrical stations between 1980 and 2009. We have taken into account all types of precipitation that amounted to, or surpassed the threshold of 50 mm in 24 hours, regardless of their nature (both short-lived rain caused by thermodynamic instability, and continuous, lengthy precipitation caused by frontal activity). The set of data on heavy precipitation and the large-scale circulation types over Europe each day between 1980 and 2009, have been stored in dedicated Microsoft SQL Server relational databases. Using Structured Query Language (SQL) queries we have been able to link these pieces of information to one another and detect correlations. For instance, we have found that, since 1997, the number of heavy precipitation events that have been recorded at stations in Romania has increased, comparatively to the 1980-1996 interval. Also, the maximum precipitation amount recorded in a year has also increased since circa 1997, and amounts over 100 mm in 24 hours have been recorded more frequently than before. Also, we have found that the BM (Central European Ridge), TRM (Central European trough) and WZ (Western, cyclonic) Grosswetterlagen are the main large-scale circulation types associated with heavy precipitation in Romania.