Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes
While a considerable number of records document the temporal variability of droughts for central Europe, the understanding of its underlying causes remains limited. In this contribution, time series of three drought indices (Standardized Precipitation Index – SPI; Standardized Precipitation Evapotra...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:cf5123e1ac234ab4b8b0b94fbdfd031d 2023-05-15T17:34:48+02:00 Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes J. Mikšovský R. Brázdil M. Trnka P. Pišoft 2019-04-01 https://doi.org/10.5194/cp-15-827-2019 https://www.clim-past.net/15/827/2019/cp-15-827-2019.pdf https://doaj.org/article/cf5123e1ac234ab4b8b0b94fbdfd031d en eng Copernicus Publications doi:10.5194/cp-15-827-2019 1814-9324 1814-9332 https://www.clim-past.net/15/827/2019/cp-15-827-2019.pdf https://doaj.org/article/cf5123e1ac234ab4b8b0b94fbdfd031d undefined Climate of the Past, Vol 15, Pp 827-847 (2019) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/cp-15-827-2019 2023-01-22T18:03:51Z While a considerable number of records document the temporal variability of droughts for central Europe, the understanding of its underlying causes remains limited. In this contribution, time series of three drought indices (Standardized Precipitation Index – SPI; Standardized Precipitation Evapotranspiration Index – SPEI; Palmer Drought Severity Index – PDSI) are analyzed with regard to mid- to long-term drought variability in the Czech Lands and its potential links to external forcings and internal climate variability modes over the 1501–2006 period. Employing instrumental and proxy-based data characterizing the external climate forcings (solar and volcanic activity, greenhouse gases) in parallel with series representing the activity of selected climate variability modes (El Niño–Southern Oscillation – ENSO; Atlantic Multidecadal Oscillation – AMO; Pacific Decadal Oscillation – PDO; North Atlantic Oscillation – NAO), regression and wavelet analyses were deployed to identify and quantify the temporal variability patterns of drought indices and similarity between individual signals. Aside from a strong connection to the NAO, temperatures in the AMO and (particularly) PDO regions were disclosed as one of the possible drivers of inter-decadal variability in the Czech drought regime. Colder and wetter episodes were found to coincide with increased volcanic activity, especially in summer, while no clear signature of solar activity was found. In addition to identification of the links themselves, their temporal stability and structure of their shared periodicities were investigated. The oscillations at periods of approximately 60–100 years were found to be potentially relevant in establishing the teleconnections affecting the long-term variability of central European droughts. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Unknown Pacific Climate of the Past 15 2 827 847 |
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envir geo J. Mikšovský R. Brázdil M. Trnka P. Pišoft Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
topic_facet |
envir geo |
description |
While a considerable number of records document the temporal variability of droughts for central Europe, the understanding of its underlying causes remains limited. In this contribution, time series of three drought indices (Standardized Precipitation Index – SPI; Standardized Precipitation Evapotranspiration Index – SPEI; Palmer Drought Severity Index – PDSI) are analyzed with regard to mid- to long-term drought variability in the Czech Lands and its potential links to external forcings and internal climate variability modes over the 1501–2006 period. Employing instrumental and proxy-based data characterizing the external climate forcings (solar and volcanic activity, greenhouse gases) in parallel with series representing the activity of selected climate variability modes (El Niño–Southern Oscillation – ENSO; Atlantic Multidecadal Oscillation – AMO; Pacific Decadal Oscillation – PDO; North Atlantic Oscillation – NAO), regression and wavelet analyses were deployed to identify and quantify the temporal variability patterns of drought indices and similarity between individual signals. Aside from a strong connection to the NAO, temperatures in the AMO and (particularly) PDO regions were disclosed as one of the possible drivers of inter-decadal variability in the Czech drought regime. Colder and wetter episodes were found to coincide with increased volcanic activity, especially in summer, while no clear signature of solar activity was found. In addition to identification of the links themselves, their temporal stability and structure of their shared periodicities were investigated. The oscillations at periods of approximately 60–100 years were found to be potentially relevant in establishing the teleconnections affecting the long-term variability of central European droughts. |
format |
Article in Journal/Newspaper |
author |
J. Mikšovský R. Brázdil M. Trnka P. Pišoft |
author_facet |
J. Mikšovský R. Brázdil M. Trnka P. Pišoft |
author_sort |
J. Mikšovský |
title |
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
title_short |
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
title_full |
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
title_fullStr |
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
title_full_unstemmed |
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes |
title_sort |
long-term variability of drought indices in the czech lands and effects of external forcings and large-scale climate variability modes |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-15-827-2019 https://www.clim-past.net/15/827/2019/cp-15-827-2019.pdf https://doaj.org/article/cf5123e1ac234ab4b8b0b94fbdfd031d |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Climate of the Past, Vol 15, Pp 827-847 (2019) |
op_relation |
doi:10.5194/cp-15-827-2019 1814-9324 1814-9332 https://www.clim-past.net/15/827/2019/cp-15-827-2019.pdf https://doaj.org/article/cf5123e1ac234ab4b8b0b94fbdfd031d |
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undefined |
op_doi |
https://doi.org/10.5194/cp-15-827-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
2 |
container_start_page |
827 |
op_container_end_page |
847 |
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1766133754843103232 |