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Tytuł: Wind Shear and the Strength of Severe Convective Phenomena - Preliminary Results from Poland in 2011–2015
Autor: Pilorz, Wojciech
Laskowski, Igor
Łupikasza, Ewa
Taszarek, Mateusz
Słowa kluczowe: wind shear; deep moist convection; large hail; severe wind gusts; tornadoes; Poland
Data wydania: 2016
Źródło: Climate, Vol. 4 (2016), art. no. 51
Abstrakt: Severe convective phenomena cause significant loss in the economy and, primarily, casualties. Therefore, it is essential to forecast such extreme events to avoid or minimize the negative consequences. Wind shear provides an updraft-downdraft separation in the convective cell, which extends the cell lifetime. Wind shears between a few different air layers have been examined in all damaging convective cases in Poland, taken from the European Severe Weather Database between 2011 and 2015, in order to find their values and patterns according to the intensity of this phenomenon. Each severe weather report was assigned wind shear values from the nearest sounding station, and subsequently the presented summary was made. It was found that wind shear values differ between the given phenomena and their intensity. This regularity is particularly visible in shears containing 0 km wind. The highest shears occur within wind reports. Lower values are associated with hail reports. An important difference between weak and F1+ tornadoes was found in most of the wind shears. Severe phenomena probability within 0–6 km and 0–1 km shears show different patterns according to the phenomena and their intensity. This finding has its application in severe weather forecasting.
URI: http://hdl.handle.net/20.500.12128/178
DOI: 10.3390/cli4040051
ISSN: 2225-1154
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