Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F19%3A43915674" target="_blank" >RIV/62156489:43210/19:43915674 - isvavai.cz</a>

Alternative codes found

RIV/86652079:_____/19:00504704 RIV/00216224:14310/19:00107413 RIV/00216208:11320/19:10394087

Result on the web

<a href="https://doi.org/10.5194/cp-15-827-2019" target="_blank" >https://doi.org/10.5194/cp-15-827-2019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/cp-15-827-2019" target="_blank" >10.5194/cp-15-827-2019</a>

Result language

angličtina

Original language name

Long-term variability of drought indices in the Czech Lands and effects of external forcings and large-scale climate variability modes

Original language 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 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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10510 - Climatic research

Project

<a href="/en/project/GA17-10026S" target="_blank" >GA17-10026S: Drought events in the Czech Republic and their causes</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Climate of the Past

ISSN

1814-9324

e-ISSN

—

Volume of the periodical

15

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

21

Pages from-to

827-847

UT code for WoS article

000466420100001

EID of the result in the Scopus database

2-s2.0-85065302417