Radar characteristics of derecho producing mesoscale convective systems in the Czech Republic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F22%3AN0000117" target="_blank" >RIV/00020699:_____/22:N0000117 - isvavai.cz</a>

Výsledek na webu

<a href="https://enacshare.epfl.ch/dUQ4fCXGYPh3RbcKWFpwL#" target="_blank" >https://enacshare.epfl.ch/dUQ4fCXGYPh3RbcKWFpwL#</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Radar characteristics of derecho producing mesoscale convective systems in the Czech Republic

Popis výsledku v původním jazyce

Contribution at ERAD 2022 conference, Locarno, Switzerland, 29.8.-2.9.2022. Abstract: The Czech weather radar network (CZRAD) consists of two radar sites, both the sites have been dual-pol C-band radars since 2015. This fact allows us to use polarimetric radar measurements for many purposes, including a better correction for attenuation which can provide us better data of precipitation estimations, better erasing of ground clutters and WLAN interference. Use of polarimetric data also allows us to identificate of updrafts of convective storm cells based on detection of so called ZDR-columns. This study uses radar data, including polarimetric and Doppler ones, to focus on derecho producing convective systems (MCS) and their behaviour from the view of the radars. Our research focuses on organization of MCS’s and behaviour of their updrafts based on ZDR-columns detection algorithm. We also study rear inflow jet presence and variations of lightning activity. We have used data from warm season derecho cases since year 2000 for general part of the study and data since 2015 for the most detailed analyses with the use of polarimetric data. We studied the ability of data from ZDR-column detection (its area, vertical development, integrated spatial volume and also their temporal variations) to predict intensity changes of the convective system and its accompanied phenomena for the next tens of minutes. We also tried to find weak points of this type of product and possible ways how to reduce them as much as possible.

Název v anglickém jazyce

Radar characteristics of derecho producing mesoscale convective systems in the Czech Republic

Popis výsledku anglicky

Contribution at ERAD 2022 conference, Locarno, Switzerland, 29.8.-2.9.2022. Abstract: The Czech weather radar network (CZRAD) consists of two radar sites, both the sites have been dual-pol C-band radars since 2015. This fact allows us to use polarimetric radar measurements for many purposes, including a better correction for attenuation which can provide us better data of precipitation estimations, better erasing of ground clutters and WLAN interference. Use of polarimetric data also allows us to identificate of updrafts of convective storm cells based on detection of so called ZDR-columns. This study uses radar data, including polarimetric and Doppler ones, to focus on derecho producing convective systems (MCS) and their behaviour from the view of the radars. Our research focuses on organization of MCS’s and behaviour of their updrafts based on ZDR-columns detection algorithm. We also study rear inflow jet presence and variations of lightning activity. We have used data from warm season derecho cases since year 2000 for general part of the study and data since 2015 for the most detailed analyses with the use of polarimetric data. We studied the ability of data from ZDR-column detection (its area, vertical development, integrated spatial volume and also their temporal variations) to predict intensity changes of the convective system and its accompanied phenomena for the next tens of minutes. We also tried to find weak points of this type of product and possible ways how to reduce them as much as possible.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů