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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:34 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Study of a severe weather event associated to frontal and convective precipitation
Authors:
Elena Mirela POLIFRONIE (1,2) and Sabina STEFAN (1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania,
2) National Meteorological Administration, Sos. Bucuresti-Ploiesti nr.97, Sector 1, ZIP Code 013686, Bucharest, Romania
E-mail
polifroniemirela@yahoo.com
Keywords:
frontal precipitation, convective precipitation
Abstract:
Generally, severe weather events has been always related to intense rainfall occurrences associated to strong convection or evolution of synoptic systems. Convective precipitation more intense and of shorter duration than frontal precipitation occurs in unstable atmospheric conditions [1].The aim of this paper is to compare the meteorological conditions and precipitaion amount associated with a frontal system that crosses Romania from 25th to 27th of May 2017 and the convective precipation of the 27th of May 2017, what manifested at 6 hours after the passing of a cold front. For comparison and to determine the mechanisms controling the mesoscale distribution of precipitation due to frontal passage and to convective conditions we analyzed meteorological and thermodynamic parameters [2]. Thus, mesoscale mean sea level pressure and geopotential patterns and convective available potential energy (CAPE), inhibition convergence (CIN), K Index were used. Multispectral satellite imagery and radar products helped us to identify frontal and convective zones. In addition, the global models and the local models, used for weather forecasting, were studied.
References:
[1] Marshall, J. S.,1953: Separation of convective and stratiform precipitation in mesoscale systems, American Meteorological Society;
[2] John Molinari and Michael Dudek, 1991: Parameterization of Convective Precipitation in Mesoscale Numerical Models: A Critical Review, American Meteorological Society, https://doi.org/10.1175/1520-0493(1992)120<0326:POCPIM>2.0.CO;2;
Acknowledgement:
We thank to National Meteorological Administration for providing all the materials needed in this research. Also we thank to European Centre for Medium-Range Weather Forecasts (ECMWF), ALARO, COSMO and ALADIN models.
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