Flash droughts in Central Europe and their circulation drivers

J 2024

Flash droughts in Central Europe and their circulation drivers

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA and Jan BALEK

Basic information

Original name

Flash droughts in Central Europe and their circulation drivers

Authors

ŘEHOŘ, Jan (203 Czech Republic, guarantor, belonging to the institution), Rudolf BRÁZDIL (203 Czech Republic, belonging to the institution), Miroslav TRNKA (203 Czech Republic) and Jan BALEK

Edition

Climate Dynamics, Springer-Verlag GmbH, 2024, 0930-7575

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 4.600 in 2022

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1007/s00382-023-06964-8

UT WoS

001072227100001

Keywords in English

Soil moisture; Flash drought; Spatiotemporal variability; Atmospheric circulation; Central Europe

Abstract

V originále

Flash droughts, defined as events with unusually rapid onset and intensification, are emerging into the spotlight as dangerous subseasonal climatic phenomena capable of causing substantial socioenvironmental impacts. However, research on their spatiotemporal variability and major drivers in Central Europe has been limited thus far. This study used gridded soil moisture data from the SoilClim model for the region consisting of the Czech Republic, Slovakia and northern part of Austria in the 1961–2021 period. Established methods of flash drought detection were implemented and adapted to conduct their comprehensive spatiotemporal analysis. The gridded flash drought results were divided into four clusters using the Ward’s hierarchical agglomerative method. Individual flash drought episodes were delimited for each cluster, divided into three phases (onset, course, end) and investigated separately in terms of drivers, represented by three meteorological variables (precipitation, actual evapotranspiration, maximum temperature) and atmospheric circulation types based on the objective classification (derived from flow strength, direction and vorticity). The frequency of flash droughts slightly decreased in the winter half-year and slightly increased in the summer half-year, with substantial amplification in the April–June season. The increase was slower than in the case of seasonal droughts, being driven by the longer-term accumulation of water deficit. Circulation drivers exhibited much stronger and more direct influence in the summer half-year, particularly causing the onset of flash drought episodes during the predominance of anticyclonic types and absence of cyclonic types, while the course of flash drought episodes was also connected to increased temperatures and often connected to warm airflow.

Links

MUNI/A/1323/2022, interní kód MU

Name: Environmentální a socioekonomické změny v geografickém výzkumu

Investor: Masaryk University, Environmental and socio-economic change in geographical research

Citovat

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA and Jan BALEK. Flash droughts in Central Europe and their circulation drivers. Climate Dynamics. Springer-Verlag GmbH, 2024, vol. 62, No 2, p. 1107-1121. ISSN 0930-7575. Available from: https://dx.doi.org/10.1007/s00382-023-06964-8.

@article{2320241,
   author = {Řehoř, Jan and Brázdil, Rudolf and Trnka, Miroslav and Balek, Jan},
   article_number = {2},
   doi = {http://dx.doi.org/10.1007/s00382-023-06964-8},
   keywords = {Soil moisture; Flash drought; Spatiotemporal variability; Atmospheric circulation; Central Europe},
   language = {eng},
   issn = {0930-7575},
   journal = {Climate Dynamics},
   title = {Flash droughts in Central Europe and their circulation drivers},
   url = {https://doi.org/10.1007/s00382-023-06964-8},
   volume = {62},
   year = {2024}
}

TY  - JOUR
ID  - 2320241
AU  - Řehoř, Jan - Brázdil, Rudolf - Trnka, Miroslav - Balek, Jan
PY  - 2024
TI  - Flash droughts in Central Europe and their circulation drivers
JF  - Climate Dynamics
VL  - 62
IS  - 2
SP  - 1107-1121
EP  - 1107-1121
PB  - Springer-Verlag GmbH
SN  - 09307575
KW  - Soil moisture
KW  - Flash drought
KW  - Spatiotemporal variability
KW  - Atmospheric circulation
KW  - Central Europe
UR  - https://doi.org/10.1007/s00382-023-06964-8
N2  - Flash droughts, defined as events with unusually rapid onset and intensification, are emerging into the spotlight as dangerous subseasonal climatic phenomena capable of causing substantial socioenvironmental impacts. However, research on their spatiotemporal variability and major drivers in Central Europe has been limited thus far. This study used gridded soil moisture data from the SoilClim model for the region consisting of the Czech Republic, Slovakia and northern part of Austria in the 1961–2021 period. Established methods of flash drought detection were implemented and adapted to conduct their comprehensive spatiotemporal analysis. The gridded flash drought results were divided into four clusters using the Ward’s hierarchical agglomerative method. Individual flash drought episodes were delimited for each cluster, divided into three phases (onset, course, end) and investigated separately in terms of drivers, represented by three meteorological variables (precipitation, actual evapotranspiration, maximum temperature) and atmospheric circulation types based on the objective classification (derived from flow strength, direction and vorticity). The frequency of flash droughts slightly decreased in the winter half-year and slightly increased in the summer half-year, with substantial amplification in the April–June season. The increase was slower than in the case of seasonal droughts, being driven by the longer-term accumulation of water deficit. Circulation drivers exhibited much stronger and more direct influence in the summer half-year, particularly causing the onset of flash drought episodes during the predominance of anticyclonic types and absence of cyclonic types, while the course of flash drought episodes was also connected to increased temperatures and often connected to warm airflow.
ER  -

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA and Jan BALEK. Flash droughts in Central Europe and their circulation drivers. \textit{Climate Dynamics}. Springer-Verlag GmbH, 2024, vol.~62, No~2, p.~1107-1121. ISSN~0930-7575. Available from: https://dx.doi.org/10.1007/s00382-023-06964-8.

Detailed Information on Publication Record