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Evaluation of meteorological factors associated with recent severe heat waves and cold spells in EURO-CORDEX RCMs over Central Europe
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SYSNO ASEP 0479090 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 Evaluation of meteorological factors associated with recent severe heat waves and cold spells in EURO-CORDEX RCMs over Central Europe Author(s) Lhotka, Ondřej (UFA-U) RID, ORCID
Kyselý, Jan (UFA-U) RID, ORCID
Plavcová, Eva (UFA-U) RID, ORCIDNumber of authors 3 Source Title EMS Annual Meeting Abstracts, Vol. 14. - Berlín : European Meteorological Society, 2017
EMS2017-203Number of pages 1 s. Publication form Online - E Action EMS Annual Meeting and European Conference for Applied Meteorology and Climatology Event date 03.09.2017 - 07.09.2017 VEvent location Dublin Country IE - Ireland Event type WRD Language eng - English Country DE - Germany Keywords heat waves ; cold spells ; regional climate models ; large-scale circulation ; land–atmosphere interactions Subject RIV DG - Athmosphere Sciences, Meteorology Institutional support UFA-U - RVO:68378289 Annotation Central Europe was recently affected by a major heat wave in August 2015, which was linked to persistent
atmospheric blocking, precipitation deficit, reduced evaporative fraction, and increased net shortwave radiation.
Favourable circulation conditions were also present during a harsh February 2012 cold spell, along with reduced
cloud cover and above-average snow amount. We evaluate simulation of analogously severe heat waves and cold
spells in historical runs of high-resolution (0.11◦
) EURO-CORDEX regional climate models (RCMs) in the
1970–2016 period. Observed data was taken from the E-OBS gridded data set and the ERA-Interim reanalysis.
A focus is given on the meteorological factors associated with severe heat waves and cold spells, because it is
important to understand whether these events in models occur for the same reasons that they do in nature.
The magnitude of severe heat waves varies among individual RCMs and is linked to the representation of
large-scale circulation and land–atmosphere interactions. Overestimation was related to a combination of strong
south-eastern advection and depletion of soil moisture, while underestimation was mainly associated with toomoist
summertime conditions. In some cases, a seemingly good reproduction of severe heat waves is erroneously
achieved through too-weak advection compensated by substantially reduced soil moisture or vice versa. Analogous
analysis is being performed for cold spells that seem to be associated with advective processes more tightly than
heat waves. The results pointed to different driving mechanisms of temperature extremes in some RCMs in comparison
to the observed data, which should be taken into account when analysing future projections of these events.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 2018
Number of the records: 1