Hydroclimate variability in the Czech Republic studied through
subjective and objective classifications of atmospheric
circulation

a 2022

Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA, Ondřej LHOTKA, Jan BALEK et. al.

Základní údaje

Originální název

Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation

Autoři

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA, Ondřej LHOTKA, Jan BALEK, Petr ŠTĚPÁNEK a Pavel ZAHRADNÍČEK

Vydání

EGU General Assembly 2022, 2022

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Stát vydavatele

Rakousko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.5194/egusphere-egu22-7522

Klíčová slova anglicky

precipitation; daily precipitation; precipitation probability; circulation type; subjective classification; objective classification; spatiotemporal variability

Změněno: 30. 5. 2022 14:56, Mgr. Jan Řehoř, Ph.D.

Anotace

V originále

Investigation of the relationship between climatological variables and circulation patterns expressed by various classifications of circulation types is a key procedure in synoptic climatology. This study provides new insights into circulation drivers of hydroclimate based on an analysis of precipitation and soil drought in multiple parts of the Czech Republic with respect to the subjective classification of the Czech Hydrometeorological Institute and objective classification based on the flow strength, flow direction, and vorticity during the 1961–2020 period. Circulation types are investigated in regard to their contributions to the total precipitation, mean daily precipitation totals, and precipitation probability. Types with a westerly airflow and a trough over Central Europe exhibit the highest proportions in precipitation totals. Types with a cyclone over Central Europe, especially combined with a northwestern or northeastern airflow, result in the highest daily mean totals and precipitation probability. Types with a southwestern airflow transport more precipitation to western parts of the Czech Republic, while those with a northeastern airflow transport more precipitation to the eastern parts, with a slight seasonal shift in the gradient axis between winter and summer. Circulation drivers of drought episodes are investigated based on soil-drought values calculated from the SoilClim model. Increased frequencies of north-eastern anticyclonic types, and decreased frequencies of directional and cyclonic are important for the origin and course of soil-drought episodes. In addition, the suitability of both classifications for long-term trends analysis is investigated.

Citovat

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA, Ondřej LHOTKA, Jan BALEK, Petr ŠTĚPÁNEK a Pavel ZAHRADNÍČEK. Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation. In EGU General Assembly 2022. 2022. Dostupné z: https://dx.doi.org/10.5194/egusphere-egu22-7522.

@proceedings{1857021,
   author = {Řehoř, Jan and Brázdil, Rudolf and Trnka, Miroslav and Lhotka, Ondřej and Balek, Jan and Štěpánek, Petr and Zahradníček, Pavel},
   booktitle = {EGU General Assembly 2022},
   doi = {http://dx.doi.org/10.5194/egusphere-egu22-7522},
   keywords = {precipitation; daily precipitation; precipitation probability; circulation type; subjective classification; objective classification; spatiotemporal variability},
   language = {eng},
   title = {Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation},
   url = {https://meetingorganizer.copernicus.org/EGU22/EGU22-7522.html},
   year = {2022}
}

TY  - CONF
ID  - 1857021
AU  - Řehoř, Jan - Brázdil, Rudolf - Trnka, Miroslav - Lhotka, Ondřej - Balek, Jan - Štěpánek, Petr - Zahradníček, Pavel
PY  - 2022
TI  - Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation
KW  - precipitation
KW  - daily precipitation
KW  - precipitation probability
KW  - circulation type
KW  - subjective classification
KW  - objective classification
KW  - spatiotemporal variability
UR  - https://meetingorganizer.copernicus.org/EGU22/EGU22-7522.html
N2  - Investigation of the relationship between climatological variables and circulation patterns expressed by various classifications of circulation types is a key procedure in synoptic climatology. This study provides new insights into circulation drivers of hydroclimate based on an analysis of precipitation and soil drought in multiple parts of the Czech Republic with respect to the subjective classification of the Czech Hydrometeorological Institute and objective classification based on the flow strength, flow direction, and vorticity during the 1961–2020 period. Circulation types are investigated in regard to their contributions to the total precipitation, mean daily precipitation totals, and precipitation probability. Types with a westerly airflow and a trough over Central Europe exhibit the highest proportions in precipitation totals. Types with a cyclone over Central Europe, especially combined with a northwestern or northeastern airflow, result in the highest daily mean totals and precipitation probability. Types with a southwestern airflow transport more precipitation to western parts of the Czech Republic, while those with a northeastern airflow transport more precipitation to the eastern parts, with a slight seasonal shift in the gradient axis between winter and summer. Circulation drivers of drought episodes are investigated based on soil-drought values calculated from the SoilClim model. Increased frequencies of north-eastern anticyclonic types, and decreased frequencies of directional and cyclonic are important for the origin and course of soil-drought episodes. In addition, the suitability of both classifications for long-term trends analysis is investigated.
ER  -

ŘEHOŘ, Jan, Rudolf BRÁZDIL, Miroslav TRNKA, Ondřej LHOTKA, Jan BALEK, Petr ŠTĚPÁNEK a Pavel ZAHRADNÍČEK. Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation. In \textit{EGU General Assembly 2022}. 2022. Dostupné z: https://dx.doi.org/10.5194/egusphere-egu22-7522.

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