Documentary-based climate reconstructions in the Czech Lands 1501–2020 CE and their European context
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Published:2022-04-29
Issue:4
Volume:18
Page:935-959
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ISSN:1814-9332
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Container-title:Climate of the Past
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language:en
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Short-container-title:Clim. Past
Author:
Brázdil Rudolf, Dobrovolný PetrORCID, Mikšovský JiříORCID, Pišoft PetrORCID, Trnka Miroslav, Možný Martin, Balek Jan
Abstract
Abstract. Annual and seasonal temperature, precipitation, and
drought index (SPI – standard precipitation index, SPEI – standard
precipitation evapotranspiration index, Z index, PDSI – Palmer Drought
Severity Index) series covering the Czech Lands territory (now the Czech
Republic) over 520 years (1501–2020 CE) reconstructed from documentary data
combined with instrumental observations were analysed herein. The
temperature series exhibits a statistically significant increasing trend,
rising from ∼ 1890 and particularly from the 1970s; 1991–2020
represents the warmest and driest 30-year period since 1501 CE. While the
long-term precipitation total fluctuations (and derived SPI fluctuations)
remain relatively stable with annual and decadal variabilities, past
temperature increases are the key factor affecting recent increasing dryness
in the SPEI, Z index, and PDSI series. The seasonal temperature series
represent a broad European area, while the seasonal precipitation series
show lower spatial correlations. A statistical attribution analysis
conducted utilizing regression and wavelet techniques confirmed the
influence of covariates related to volcanic activity (prompting temporary
temperature decreases, especially during summer) and the North Atlantic
Oscillation (influential in all seasons except summer) in the Czech climate
reconstructions. Furthermore, components tied to multidecadal variabilities
in the northern Atlantic and northern Pacific were identified in the
temperature and precipitation series and in the drought indices, revealing
notable shared oscillations, particularly at periods of approximately
70–100 years.
Funder
Ministerstvo Školství, Mládeže a Tělovýchovy Grantová Agentura České Republiky
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
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