Naslov
INTRODUCTION TO NEW THUNDERSTORM INTENSITY INDEX (TSII)

Autori
Jelić, Damjan ; Telišman Prtenjak, Maja ; Malečić, Barbara ; Renko, Tanja

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

Izvornik
Knjiga sažetaka, MI8 / - , 2022, 24-24

Skup
Meteorološki izazovi 8: Zrak koji udišemo, zrak koji prognoziramo = Challenges in meteorology 8: The air we breathe, the air we forecast

Mjesto i datum
Zagreb, Hrvatska, 28.04.2022. - 29.04.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
THUNDERSTORM

Sažetak
Lightning data provide very high spatial and temporal resolution allowing us to decompose thunderstorms into smaller segments. By using those segments, we introduce a new Thunderstorm intensity index (TSII). Based on the mathematical background of the lightning jump, TSII aims to identify areas that are most affected by the storm. Such index captures location in space and time where a thunderstorm experienced a sudden positive change in lightning activity, using the Eulerian standpoint. The advantage is independence to a total number of flashes produced by the storm (which can vary significantly), and high temporal monitoring (2 min). TSII was established within the SWALDRIC project using a period of 11 years of lightning data and in a study area of the NE Adriatic region. Validation is done against precipitation, wind, hail, waterspouts, and a comparison with ERA5 instability indices is made. Results show very good agreement between higher rain intensities and total precipitation in the vicinity of TSII. Good agreement with hail occurrence, waterspout presence within 15 km radius. Also, TSII turned out to be invariant on the size of the system thus allowing us to recognize small-scale intense thunderstorms. The main goal is to present background principles of TSII computations as well as key verification results considering precipitation and hail. Due to the nature of TSII, it has the potential to be used in nowcasting, model verification, and climatological studies.

Izvorni jezik
Engleski

POVEZANOST RADA