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Large-scale heavy precipitation and its link to atmospheric circulation in climate model outputs over central Europe
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SYSNO ASEP 0545662 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Large-scale heavy precipitation and its link to atmospheric circulation in climate model outputs over central Europe Author(s) Beranová, Romana (UFA-U) RID, ORCID
Kyselý, Jan (UFA-U) RID, ORCIDNumber of authors 2 Source Title EMS Annual Meeting Abstracts, Vol. 18. - Berlin : European Meteorological Society, 2020 Number of pages 1 s. Publication form Online - E Action EMS Annual Meeting 2021 Event date 06.09.2021 - 10.09.2021 VEvent location online Event type WRD Language eng - English Country DE - Germany Keywords regional climate model (RCM) ; Euro-CORDEX project ; extreme precipitation ; atmospheric circulation types Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Climatic research Institutional support UFA-U - RVO:68378289 Annotation Heavy large-scale precipitation events are associated with large negative impacts on human society, mainly as they may trigger floods and landslides. Therefore, it is important to better understand underlying physical mechanisms leading to extremes and how they are reproduced in climate models.
The present study evaluates ability of current climate models to reproduce relationships between large-scale heavy precipitation and atmospheric circulation over central Europe. We use an ensemble of 32 regional climate model (RCM) simulations with the 0.11° resolution, taken from the Euro-CORDEX project. The statistics are compared for the recent climate simulations (1951-2005) against observations from the E-OBS gridded data set to identify main drawbacks of the RCMs. The large-scale heavy precipitation events are defined as days with at least 50% of all grid points over the examined area with heavy precipitation (exceeding the 75th or 90th percentile of the distribution of seasonal rainy days). The association with atmospheric circulation types is investigated through circulation types derived from sea level pressure using airflow indices (direction, strength and vorticity). The analysis is carried out separately for summer (JJA) and winter (DJF) season.
The number of days with large-scale heavy precipitation per season in observations reflects the seasonal precipitation sums (the larger precipitation sum the more days). In winter, the large-scale heavy precipitation is mainly associated with the west, northwest, southwest and cyclonic circulation types while in summer with the cyclonic, north, southwest and undefined types (in the observed data). Some RCM simulations are not able to reproduce the number of days with the large-scale heavy precipitation events and their relationships with circulation, especially in summer.Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2022
Number of the records: 1