Izvorni znanstveni članak
A CASE STUDY OF A COLD AIR OUTBREAK ON 20 APRIL 1997 OVER CROATIA
Nedjeljka Brzović
; Meteorological and Hydrological Service Grič 3, 10000 Zagreb, Croatia, Department of Meteorology, Stockholm university, Sweden
Sažetak
This paper presents the weather situation on 20-23 April 1997, which was one of the strongest cold outbreaks ever recorded in April in Croatia. The processes leading to extremely low temperatures and heavy snowdrifts in the Dalmatian inland occurred on the front line between a polar air outbreak over central Europe and a deepening Mediterranean cyclone approaching the Adriatic. The genesis of a mesoscale vortex in the Adriatic has been diagnosed with the aid of satellite imagery and a high-resolution numerical model. The analysis of surface data has shown how the frontal system from the north slowed down over the Dinaric Alps and at mid-Adriatic, where the cyclogenetic process took place. The
analysis of the vertical cross-sections produced using the rawinsonde data and the numerical model outputs have shown that the model successfully reproduced the intensity and time changes of the various meteorological frelds. In particular, the model successfully reproduced a mesoscale cyclone developed in the lower troposphere over the southern Adriatic on 23 April.
Ključne riječi
cold front; mesoscale processes; numerical modelling; Dinaric Alps; Adriatic
Hrčak ID:
67570
URI
Datum izdavanja:
16.12.1999.
Posjeta: 739 *