DOI: 10.5593/SGEM2015/B21/S10.123

ANALYSIS OF FOG EVENTS AT MAGURELE – ROMANIA USING GROUND BASED EQUIPMENTS AND AIR CIRCULATION

F.Toanca, H. Stefanie, S. Andrei, N. Barbu, D. Nicolae
Friday 18 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-34-6 / ISSN 1314-2704, June 18-24, 2015, Book2 Vol. 1, 965-972 pp

ABSTRACT
The fog is well known due to its hazardous impact on economic activity, especially on road and air transport. Despite the knowledge acquired so far, there are still a lot of uncertainties regarding the physical mechanisms during a fog lifecycle. The present work is focused on identification and analysis of fog events occurred during the cold seasons of 2012 - 2014, using temperature and humidity retrievals from a HATPRO Microwave Radiometer (MWR) and Vaisala Ceilometer CL 31 backscatter’s coefficient. These two instruments are placed in a sub-urban area, at Măgurele (26.029E, 44.348N, 93m ASL) 5 km South-West of Bucharest. In addition to instruments measurements and observational data, local meteorological conditions for the analyzed period were integrated into the large-scale air circulation, using synoptic circulation patterns (GrossWetterTypen - GWT) developed within COST733 Action. The results indicate that large-scale air circulation affects the generation and dissipation of fog by modification of the local meteorological conditions due to the advection of air mass with different characteristics or blocking them within the study area. The study emphasized that large-scale circulation changes are also related with pre/post frontal fog events.

Keywords: fog, ground based equipment, air circulation


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