engleski

Processes leading to heavy precipitation over north-eastern Adriatic during the HyMeX SOP1

During SOP1, 16 IOPs were dedicated to heavy precipitation events (HPE) over the western Mediterranean and 8 of these events subsequently affected the eastern Adriatic Sea and Croatia. All of them produced localized heavy precipitation and often were properly forecast by the available operational model ALADIN but prediction of the amount, precise time and the location of maximum intensity was not always exactly represented. The total precipitation for the SOP1 was above the corresponding climatology for the Adriatic. Maximum of precipitation (more than 1.000 mm in 61 days at some locations) was recorded on the northern Adriatic (city of Rijeka) and its mountainous hinterland of Gorski Kotar. Most the HPEs contain similar ingredients and synoptic setting but of different intensity: a deep upper level through, a cyclone strengthening over the Mediterranean (or developing over Gulf of Genoa, Lyon or Tyrhennian sea), a strong south-westerly low-level jet stream that advects the moist and warm air towards the orographic obstacles along eastern Adriatic coastline and destabilizes the atmosphere and the strong low level winds which pick up the moisture from the sea. As the sea provides a large source of moisture and heat, the steep slopes of the surrounding mountains in the vicinity of urbanized northern Adriatic coastal areas are the key factors in determining the moisture convergence and the rapid uplift of moist and unstable air responsible for triggering condensation and convective instability processes. Overview of processes leading to heavy precipitation over north-eastern Adriatic during the HyMeX SOP1 will be presented, with special focus on the extraordinarily rare heavy precipitation event IOP2 (12 September 2012) that occurred in wider area of the city of Rijeka.

processes, heavy precipitation, Adriatic, Hymex

nije evidentirano