Milekic, Zorica (University of Belgrade)
Investigations of appearance of explosive cyclogenesis by today has showed that North Atlanci and North Pacific have greatest frequency of this phenomenon. Explosive orographic cyclogenesis, which appears in the lee of the Alps in Mediterranean, has significant impact on weather in this region of Europe, producing rapid chnges of meteorological characteristics, frequently followed by bad weather conditions. Fall of sea level pressure of 1mb/1h, at least, for time period of 24h, at least, at latitude of 60░ is required for filling criterion which was used for determination of appearance of explosive cyclogenesis, Sanders, Gyakum (1980). However, applying of that criterion on Mediterranean cyclones does not give possibility to take into account their spatial and time scales, which are less comparing to ocean cyclones. Therefore, it gives large frequency of explosive deepening over oceans, but Mediterranean, by the same condition, is the region with visibly less frequency, besides observations which detect frequent appearance of dangerous weather conditions connected with rapid development of cyclogenesis in the lee of the Alps. In the earlier literature occupied with the problem of explosive cyclogenesis is suggested by Djuro Radinovic (1995) a new criterion based nor on central pressure or vorticity, but total amount and change of cyclonic circulation, while are taken into account spatial and time scales of Mediterranean cyclones, comparing to Northatlantic. that criterion makes studying of Mediterranean cyclones easier, so that using it gives possibility of investigations of appearance of explsoive cyclogenesis in Mediterranean. () applying of the earlier criterion, Djuro Radinovic (1995), which is adpated to the spatial and time scales of Mediterranean cyclones will cause detection of more frequent appearance of explosive deepening in Mediterranean comparing to criterion Sanders, Gyakum (1980). General goal of this paper is to show possible differences that appear in detection of appearance of explosive cyclogenesis on sample of Mediterranean cyclones in period 1981-1990 utilizing criteria of explosive deepening mentioned above.