Radar-based precipitation climatology of the Czech Republic in the warm part of the year

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00468721" target="_blank" >RIV/68378289:_____/16:00468721 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Radar-based precipitation climatology of the Czech Republic in the warm part of the year

Popis výsledku v původním jazyce

High resolution quantitative precipitation estimation (QPE) represent a powerful tool for various climatologicalnstudies, especially those focused on analysis of precipitation extremes connected with climate change. The study willnpresent climatological analysis of precipitation totals accumulated over the warm part (May-September) of the yearsn2002-2011 on the area of the Czech Republic (CR). The rain rates were calculated using radar reflectivity data at 2nkm above sea level (CAPPI 2 km) estimated from weather radar measurements performed by two Czech C-bandnDoppler radars (Brdy, Skalky) every 5 (since June 2009 onwards) and 10 minutes in 1 km by 1 km square boxes overnthe whole area of the CR. Radar-derived daily precipitation was merged with daily rain gauge measurements andnresultant adjusted daily sums of precipitation were divided into 10 minutes precipitation in the ratio of 10 minutesnradar-derived precipitation.nWith respect to the spatial distribution a frequency of precipitation for given thresholds will be calculated in everynpixel. The accumulation and average of adjusted radar-derived precipitation and interpolated precipitation measurednby rain gauges will be compared and their difference will be expressed by various verification techniques (e.g., RMSE,nBIAS, etc.). Besides precipitation totals accumulated over longer period, attention will be also paid to the analysis ofnextreme sub-daily precipitation events due to their high variability in space and time. Small-scale differences ofnprecipitation totals accumulated over different time scales in areas with large elevation gradient, such as northwestnpart of the CR, will be studied and quantified. The differences will be demonstrated on one selected case with heavynprecipitation.

Název v anglickém jazyce

Radar-based precipitation climatology of the Czech Republic in the warm part of the year

Popis výsledku anglicky

High resolution quantitative precipitation estimation (QPE) represent a powerful tool for various climatologicalnstudies, especially those focused on analysis of precipitation extremes connected with climate change. The study willnpresent climatological analysis of precipitation totals accumulated over the warm part (May-September) of the yearsn2002-2011 on the area of the Czech Republic (CR). The rain rates were calculated using radar reflectivity data at 2nkm above sea level (CAPPI 2 km) estimated from weather radar measurements performed by two Czech C-bandnDoppler radars (Brdy, Skalky) every 5 (since June 2009 onwards) and 10 minutes in 1 km by 1 km square boxes overnthe whole area of the CR. Radar-derived daily precipitation was merged with daily rain gauge measurements andnresultant adjusted daily sums of precipitation were divided into 10 minutes precipitation in the ratio of 10 minutesnradar-derived precipitation.nWith respect to the spatial distribution a frequency of precipitation for given thresholds will be calculated in everynpixel. The accumulation and average of adjusted radar-derived precipitation and interpolated precipitation measurednby rain gauges will be compared and their difference will be expressed by various verification techniques (e.g., RMSE,nBIAS, etc.). Besides precipitation totals accumulated over longer period, attention will be also paid to the analysis ofnextreme sub-daily precipitation events due to their high variability in space and time. Small-scale differences ofnprecipitation totals accumulated over different time scales in areas with large elevation gradient, such as northwestnpart of the CR, will be studied and quantified. The differences will be demonstrated on one selected case with heavynprecipitation.

Druh

O - Ostatní výsledky

CEP obor

DG - Vědy o atmosféře, meteorologie

OECD FORD obor

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Projekt

<a href="/cs/project/QJ1520265" target="_blank" >QJ1520265: Vliv variability krátkodobých srážek a následného odtoku v malých povodích České republiky na hospodaření s vodou v krajině</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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