Large-scale heavy precipitation over the Czech Republic and its link to atmospheric circulation in CORDEX regional climate models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00583842" target="_blank" >RIV/68378289:_____/24:00583842 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s00704-024-04907-9" target="_blank" >https://link.springer.com/article/10.1007/s00704-024-04907-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00704-024-04907-9" target="_blank" >10.1007/s00704-024-04907-9</a>

Result language

angličtina

Original language name

Large-scale heavy precipitation over the Czech Republic and its link to atmospheric circulation in CORDEX regional climate models

Original language description

The study evaluates ability of regional climate models (RCMs) to reproduce relationships between large-scale heavy precipitation events (LHPEs) over the Czech Republic and atmospheric circulation. We use an ensemble of 32 RCM simulations with the 0.11° resolution from the Euro-CORDEX project, and compare the historical simulations (1951–2005) against observations from the E-OBS data set. A novel selection criterion for LHPEs is proposed, defining these as days with at least 70% of all grid boxes over a given area with precipitation amounts exceeding the 90th grid-specific percentile of the seasonal distribution of daily amounts. The association with atmospheric circulation is investigated through circulation types derived from sea level pressure using airflow indices (direction, strength and vorticity). The majority of the RCMs capture that the frequency of days with LHPEs is higher in winter than summer, but almost all underestimate the occurrence of LHPEs in both seasons. In winter, the observed LHPEs are connected mainly with cyclonic types and westerly supertype: the role of nonwesterly and cyclonic-nonwesterly supertypes is significant only in the eastern part, where the Atlantic influence is weaker. In summer, the importance of cyclonic and nonwesterly types in producing LHPEs increases compared to winter. The RCMs reasonably well reproduce these links, including differences between seasons and regions, if their ensemble mean is evaluated, but large variations occur among individual simulations mainly in summer. The importance of cyclonic vorticity is overestimated in the RCMs, while westerly advection of moist air plays a smaller role in models than in observations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10509 - Meteorology and atmospheric sciences

Project

<a href="/en/project/GA20-28560S" target="_blank" >GA20-28560S: Driving mechanisms of extremes in reanalysis and climate models</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Theoretical and Applied Climatology

ISSN

0177-798X

e-ISSN

1434-4483

Volume of the periodical

155

Issue of the periodical within the volume

6

Country of publishing house

AT - AUSTRIA

Number of pages

12

Pages from-to

4737-4748

UT code for WoS article

001176520800001

EID of the result in the Scopus database

2-s2.0-85186865805