Naslov
EOF analysis of the hailpad data from the polygon in Croatia

Autori
Počakal, Damir ; Večenaj, Željko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6th European Conference on Severe Storms - Extended abstracts / - , 2011

Skup
6th European Conference on Severe Storms

Mjesto i datum
Palma de Mallorca, Španjolska, 03.10.2011. - 07.10.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Hail; Hailpad polygon; Orography; EOF analysis

Sažetak
Continental part of Croatia is exposed to the thunderstorms with severe rain and hail, especially in the summer months. This area is very important in terms of agriculture. Hence, in order to document hail events in details, a hailpad polygon 30×20 km in size was installed in the north-western part of this area (Zagorje) before the hail fall season in 2002. The polygon is settled between three mountains (Fig. 1): Ivančica on the north, Medvednica on the south and Kalnik on the northeast. A dense network with 150 hail pads with linear spacing of 2 km (1 hail pad per 4 km2) was obtained. Hail parameters that are obtained from hailpads can be used in climatologically and dynamical studies of hail. In this study, we use the data gathered in the hailpad polygon within the period 2002 – 2010. We analyzed the intensity (kinetic energy, K.E.) of hail, the maximum hailstone diameter and the hail fall duration, but only the results for K.E. are shown here. The goal is to investigate what are the factors that have influence on spatial and temporal distributions of these parameters in the polygon. There are some indications that orography could have significant influence (Počakal et al. 2009). Our approach is to implement the empirical orthogonal functions (EOF) method to the data from the hailpad polygon in the above mentioned 9-years period and to inspect this hypothesis.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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