Naslov
New perspectives and applications of lightning jump

Autori
Jelić, Damjan ; Megyeri, Otília Anna ; Belušić, Andreina ; Telišman Prtenjak, Maja

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

Skup
European Conference for Applied Meteorology and Climatology 2018 ; Weather and climate: global change and local hazards

Mjesto i datum
Budimpešta, Mađarska, 03.09.2018. - 07.09.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hail, lightning jump, north-eastern Adriatic

Sažetak
In the last decade, the approach based on lightning data to investigated hail, severe wind and tornadoes has been developed. The method is based on mathematical model which is detecting sudden increases in lightning activity known as a lightning jump. So far, the lightning jump was successfully used as a proxy for severe weather detection in nowcasting, since it occurs several minutes to roughly 60 minutes prior to severe events (e.g. gusts or hail. . . ). Now, we are expanding applicability of lightning jump towards climatological assessments of severe events in case where no radar data are available. The tested area contains the Istria peninsula which is a part of northeastern Adriatic coast, area in the Mediterranean known for its strong convective activity. For the area, lightning data from LINET network and hail data from the national meteorological service in the 2008-2015 period have been used. Taking into account the specific method objections, the original model for a lightning jump was tailored to handle lightning data without the help of radar. Namely, we developed 2D lightning strike database with 2 min time step on resolution of 4km and we compute lightning jumps for each point of the grid. Using the station hail measurements as ground truth at corresponding grid point and statistical methods as mathematical link the probability distributions of lightning jump and hail measurements have been connected. Applying those distributions we were able to fill the gaps between station measurements and obtain two-dimensional climatology of hail frequencies based on lightning jumps.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika

POVEZANOST RADA