PIŠOFT, Petr, Jaroslava KALVOVÁ and Rudolf BRÁZDIL. Cycles and trends in the Czech temperature series using wavelet transform. International Journal of Climatology. 2004, vol. 24, No 12, p. 1661-1670. ISSN 0899-8418.
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Basic information
Original name Cycles and trends in the Czech temperature series using wavelet transform
Name in Czech Cykly a trendy v českých teplotních řadách s použitím vejvletů
Authors PIŠOFT, Petr (203 Czech Republic, guarantor), Jaroslava KALVOVÁ (203 Czech Republic) and Rudolf BRÁZDIL (203 Czech Republic).
Edition International Journal of Climatology, 2004, 0899-8418.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10500 1.5. Earth and related environmental sciences
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 1.658
RIV identification code RIV/00216224:14310/04:00011795
Organization unit Faculty of Science
UT WoS 000225286000005
Keywords in English climate variability; wavelet transform; temperature series; Czech Republic; trend; oscillations
Tags climate variability, Czech Republic, oscillations, temperature series, trend, wavelet transform
Changed by Changed by: prof. RNDr. Rudolf Brázdil, DrSc., učo 2755. Changed: 7/4/2005 18:59.
Abstract
Temperature variability in the Czech Republic is analyzed by means of the wavelet transform. This advanced time-frequency analysis provides information about the nature and time-frequency localization of present oscillations. The data-set comprises four mean monthly temperature series from Prague-Klementinum, Brno, Mt. Milešovka and the gridded temperature series for the Czech Republic. The results of their wavelet transforms are presented as a) trend analysis (computed by the inverse wavelet transform) and b) periodicities and oscillations (distinguishable from the series wavelet power spectra and global wavelet spectra). The results show considerable similarity among individual series. Examples are the common time period between 1930 and 2002 expressed in all power spectra, the pronounced oscillations of about 8 and 12-14 years in all series, and the noticeable increase of temperatures in all cases. As a supplement to this study, wavelet transforms were performed on the variance-adjusted version of combined land and marine temperature anomalies for the Northern Hemisphere from the Hadley Centre. Only some results of this analysis are mentioned and discussed.
Abstract (in Czech)
Teplotní variabilita ČR je analyzována metodou vejvletů. Tato pokročilá časově-frekvenční analýza poskytuje informace o teplotních oscilacích. Zpracování je provedeno pro teplotní řady Prahy-Klementina, Brna, Milešovky a řadu ČR. Výsledky jsou prezentovány v podobě: a) trendů, b) periodičnosti a kolísání. Výsledky jsou prezentovány pro společné období 1930-2000 pomocí variančních spekter (významné cykly 8 a 12-14 let) a ukazují významný vzestupný trend ve všech případech. Vejvlet analýza byla provedena také pro kombinovanou teplotní řadu Severní polokoule podle Hadleyho centra. Diskutovány jsou některeé výsledky analýzy.
Links
GA205/01/1067, research and development projectName: Meteorologické extrémy a jejich dopady v Českých zemích od 16. století
Investor: Czech Science Foundation, Meteorological extremes and their impacts in the Czech Lands since the 16th century
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