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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:33 |
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Conference: Bucharest University Faculty of Physics 2012 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Synoptic configurations related to extreme hydrometeorological events in Romania
Authors:
V.Em. STEFANESCU(1,2), Sabina STEFAN(1)
Affiliation:
(1) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Romania
(2) National Meteorological Administration, Bucharest, Romania
E-mail
victem@gmail.com;
Keywords:
Romania,meteorology,hidrology,extreme weather,flash floods
Abstract:
During the 30 years between 1980 and 2009, an increasing trend was detected in the number of heavy precipitation events and that of days with such events. In turn, these can lead to hydrological extremes in parts of the country, particularly the Siret catchment. Potential causality has been investigated, of the general synoptic context in Europe over the onset of such events. Strong correlations have been found between three types of air circulation and the time series of precipitation and maximum monthly discharges in the Siret catchment. In the Hess-Brezowsky subjective classification, these types are BM, TRM and WZ, while in the GWT18 objective classification (COST Action 733) these are 5, 13 and 17. At sea level, these types reveal either northern or north-western flow, or a low-pressure system above Romania, while in the free atmosphere the flow pattern is following a trough. Areas are highlighted that were most exposed to hazardous weather and consequent flash floods. An outline of such events around July 12, 2005 is presented, when extreme precipitation events in the Siret catchment were associated with maximum monthly discharges.
Note: Victor Stefanescu was supported by the University of Bucharest, through the POSDRU/88/1.5/S/56668 Project.
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