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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-21 20:21 |
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Conference: Bucharest University Faculty of Physics 2008 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
The Sub-Tropical jet stream over Romania and the associated atmospheric instability- a case study
Authors:
Florinela Georgescu, Simona Tascu, Doina Banciu, Sabina Stefan, Gabriela Bancila
Affiliation:
National Meteorological Administration, Bucharest, Romania
E-mail
florinela.popa@meteo.inmh.ro
Keywords:
Sub-Tropical jet stream, doubled tropopause, atmospheric instability
Abstract:
The 2007 summer was characterized by an unusual high frequency of tropical origin air mass advections over Romania leading to extremely high temperature periods. These very hot periods were followed by short events of intense atmospheric instability. During 10-12th of July, the atmospheric instability covered the entire Romanian area. Heavy rain, strong winds and flash floods affected especially the eastern Romania.
The aim of this paper is to underline the characteristics of the tropical air mass invasions and to analyse the tropical air mass and frontal instability features for the above mentioned episode. Classical observations and remote sensing data together with global and limited area models output were used for the analysis of meteorological fields evolution mainly in high and medium troposphere. A comparison of the models performances for the precipitation forecast is included.
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