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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:06 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
The Wind Gusts Study in the Case of Explosive Mediterranean Cyclone
Authors:
Mihaela BRÂNCUŞ (1,2),Sabina ȘTEFAN (1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O. BOX, MG-11, Magurele, Romania
2) Romanian National Meteorological Administration- RMC Oltenia, Craiova, 200581, Romania
E-mail
mihaela.brancus@yahoo.com
Keywords:
Mediterranean cyclone, explosive cyclogenesis, intense wind
Abstract:
Intense extratropical cyclones can produce severe weather phenomena such as strong surface winds. Depending where are localised, these intense winds can be due to Warm Conveyor Belt or Cold-Conveyor-Belt Jet (Carlson, 1980; Schultz, 2001) or to Sting Jet (Browning, 2004; Clark et al., 2005; Baker, 2009, Schultz and Sienkewich, 2013).In order to establish the minimum central pressure of the low and what are the main factors that determine the near surface wind gusts, the dynamics of an explosive Mediterranean Cyclone case was analyzed. Numerical outputs from the Advanced Research of Weather Research and Forecast Model (WRF) was used, with initialization data from 0.25° European Centre for Medium-Range Weather Forecasts (ECMWF) analyses. The analysis of the simulation outputs shows that the minimum central pressure was with 4 hPa less than recorded at weather station from that area. The wind field highlighted many wind maxima at different time steps, suggesting that the strongest winds were due to Sting Jets and Cold Conveyor Belt.
References:
Baker, L., 2009: Sting jets in severe northern European wind storms. Weather, 64, 143–148
Browning, K. A., 2004: The sting at the end of the tail: Damaging winds associated with extratropical cyclones. Quart. J. Roy. Meteor. Soc., 130, 375–399
Clark, P. A., K. A. Browning, and C. Wang, 2005: The sting at the end of the tail:Model diagnostics of fine-scale three-dimensional structure of the cloud head. Quart. J. Roy. Meteor. Soc., 131, 2263–2292
Schultz DM, Sienkiewicz JM. 2013. Using frontogenesis to identify sting jets in extratropical cyclones. Weather Forecasting in press. DOI:10.1175/WAF-D-12-00126.1
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