HOME PAGE of Petr Stepanek

I work as a climatologist at CHMI (Czech Hydrometeorological Institute), Regional Office Brno.

My studies

• in my project for Degree of Bachelor (1996) I devoted to Methods of Homogenization applied to Brno air temperature and precipitation series. For this purpose I created software which can be used generally for any time series. The software contains basic statistical tests and widely used homogeneity tests such as:
  • Craddock's test of Cumulative Deviations
  • Bivariate test of Maronna, Yohai,
  • Standard Normal Homogeneity Test of Alexandersson (for single shift, double shift, trend, std ...)
  • Homogeneity Test of Easterling, Peterson, method of Vincent and others ...
  Within the software there are widely used graphs so that results can be easily interpreted.
• the topic of my thesis for Degree of Master (1998) was Methods of Time Series Analysis and I continued investigating Brno air temperature and precipitation series in it. I have improved my software so that there are included widely used methods for analysis of time series:
  • correlation; analysis,
  • filtration (low-pass, band-pass, high-pass),
  • spectral analysis (Blackman - Tukey, MESA, dynamic MESA),
  • coherency analysis,
  and others ...
• Theme of my dissertation (2006): Air Temperature Variability within the Area of the Czech Republic in the Period of Instrumental Measurements (click for Abstract,  Whole text  + Appendix - in Czech,  Prezentation - pdf slides - in Czech ) . The first task of the thesis has been homogenization of all long air-temperature series of the Czech Republic (up to now there are 174 homogenized stations between 1771-2005). Averaged air-temperature series for the Czech Republic has been calculated. Further task was time series analysis, trend and power spectrum analysis, using also multivariate methods such as PCA, cluster analysis, multivariate linear regression (for assessing impacts of solar activity, volcanic activity, ENSO, CO2 on air temperature within the Czech Republic).
  • Averaged series of the Czech Republic (1848-2000, monthly data)
    
  
  
• During my work - the thesis and various projects - I have created the software for Windows ( AnClim, ProClimDB, LoadData ). It is available free of charge (for non-commercial purposes). I am able to help with solutions regarding statistical processing, handling big amount of data etc. In case of interest contact me.
  • 

Current Projects

• ENSEMBLES
• CECILIA
• CAMBIO CLIMATICO Y DINAMICA FORESTAL EN ECOSISTEMAS MEDITERRANEOS (CLIMATIC VARIABILITY AND FOREST DYNAMIS IN ECOTONE ECOSYSTEMS)
• Region of influence approach and non-stationary extreme value distributions in the frequency analysis of precipitation extremes (Frekvenční analýza srážkových extrémů pomocí metody oblasti vlivu a nestacionárních rozdělení extrémních hodnot)
• Atlas podnebí České republiky a regionalizace výstupů klimatických modelů nelineárními metodami
• Časová a prostorová variabilita klimatu České republiky podle denních vizuálních záznamů počasí a přístrojových měření

Selected publications

• Štěpánek, P. (2004): Homogenizace teploty vzduchu na území České republiky v období přístrojových pozorování. Práce a studie, 32. ČHMÚ - Praha, 56 s.
• Štěpánek, P. (2004): Homogenization of air temperature series in the Czech Republic during a period of instrumental measurements. In: Fourth seminar for homogenization and quality control in climatological databases (Budapest, Hungary, 6-10 October 2003), WCDMP-No. 56. WMO, Genova. 117-133. http://www.wmo.ch/web/wcp/wcdmp/reports/WCDMP-56.pdf
• Štěpánek, P. (2003): Homogeneización de las series de temperatura del aire en la República Checa durante el período instrumental (Homogenization of air temperature series in the Czech Republic during a period of instrumental measurements). Geographicalia, 43, 5-24.
• Štěpánek P. (2005): AnClim - software for time series analysis. Dept. of Geography, Fac. of Natural Sciences, MU, Brno, 1.47 MB. http://www.klimahom.com/software/AnClim.html
• Štěpánek, P. (2004): ProClimDB – software for processing climatological datasets. CHMI, regional office Brno. http://www.klimahom.com/software/ProcData.html
• Brázdil, R., Štěpánek, P., Květoň, V. (2001): Temperature series of the Czech Republic and its relation to Northern Hemisphere temperatures in the period 1961-1999. In: Brunet India, M., López Bonillo, D., eds.: Detecting and Modelling Regional Climate Change. Springer, Berlin, s. 69-80.
• Brázdil, R., Štěpánek, P., Květoň, V. (2000): Air Temperature Fluctuations in the Czech Republic in the Period 1961-1999. In: Reconstructions of Climate and its Modelling, Obrebska-Starkel, B., (eds.), IGUJ Krakow, 173-178.
• Brázdil R., Štěpánek P. (1998): Kolísání teploty vzduchu v Brně v období 1891-1995. In: Geografie – Sborník České geografické společnosti, 103, č. 1, s. 13-30.
• González Hidalgo J.C., Vicente, S.M., De Luis, M., Štěpánek, P., Cuadrat, J.M., Raventós, J., Sánchez Montahud, J.R. (2002): Reconstruccion de registros pluviales y creacion de una base de datos mensuales en la vertiente mediterránea espanola. En El agua y el clima (J.A. Guijarro, M. Grimalt, M. Laita y S. Alonso, Eds). Publicaciones de la Asociación Espanola de Climatología, Serie A, no 3, 219-228.
• González Hidalgo, J.C., De Luís, M., Štěpánek, P., Raventós, J., Cuadrat, J.M. (2002): Reconstruccón, estabilidad y proceso de homogeneizado de series de precipitación en ambientes de elevada variabilidad pluvial. En La información climática como herramienta de gestión ambiental (J.M. Cuadrat, S.M. Vicente y M.A. Saz, Eds). AGE - Universidad de Zaragoza, 47-57.

• click here

Last update: 15.12.2006