Detailed Information on Publication Record
2019
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes
MIKŠOVSKÝ, Jiří, Rudolf BRÁZDIL, Miroslav TRNKA and Petr PIŠOFTBasic information
Original name
Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes
Authors
MIKŠOVSKÝ, Jiří (203 Czech Republic), Rudolf BRÁZDIL (203 Czech Republic, guarantor, belonging to the institution), Miroslav TRNKA (203 Czech Republic) and Petr PIŠOFT (203 Czech Republic)
Edition
Climate of the Past, Göttingen, Published by Copernicus Publications on behalf of the European Geosciences Union, 2019, 1814-9324
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10510 Climatic research
Country of publisher
Germany
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 3.536
RIV identification code
RIV/00216224:14310/19:00107413
Organization unit
Faculty of Science
UT WoS
000466420100001
Keywords in English
drought indices; variability; Czech Lands; forcings; climate variability modes; regression analysis; wavelet analysis
Tags
Tags
International impact, Reviewed
Změněno: 18/3/2020 14:05, Mgr. Marie Šípková, DiS.
Abstract
V originále
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 Nino-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.
Links
GA17-10026S, research and development project |
|