Studia Geophysica et Geodaetica

, Volume 44, Issue 1, pp 57–72 | Cite as

Heat Waves in the South Moravian Region During the Period 1961-1995

  • Jan Kyselý
  • Jaroslava Kalvová
  • Vít Květoň

Abstract

Heat waves (periods of extremely hot summer weather) in the region of south Moravia are in the focus of this study. The introduced definition consists of three requirements imposed on the period that is considered a heat wave: at least three days with TMAX≥30.0°C must be observed; the mean TMAXover the whole period is at least 30.0°C; and TMAXmust not drop below 25.0°C. To compare the severity of the individual heat waves, various characteristics (duration, number of tropical days, peak temperature, cumulative temperature excess, precipitation amount) are examined. The heat wave index HWI is defined to express the severity of heat waves in the most comprehensive way.

An extraordinary heat wave occurred in July and August 1994; it lasted more than a month at several stations, while the duration of a typical heat wave is only 4 - 7 days. The extremely long unbroken period of tropical days, and even of days with TMAX≥32.0°C, represents the most distinct feature of the severe 1994 heat wave. With regard to heat wave characteristics, the summer temperature exceptionality of the early 1990s is indubitable.

extreme events heat wave tropical day climate change 

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References

  1. Bassow S.L., McConnaughay K.D.M. and Bazzaz F.A., 1994: The response of temperate tree seedlings grown in elevated CO2 to extreme temperature events. Ecological Applications, 4, 593-603.Google Scholar
  2. Changnon S.A., Kunkel K.E. and Reinke B.C., 1996: Impacts and responses to the 1995 heat wave: a call to action. Bull. Amer. Meteor. Soc., 77, 1497-1506.Google Scholar
  3. DeGaetano A.T., 1996: Recent trends in maximum and minimum temperature threshold exceedences in the northeastern United States. J. Climate, 9, 1646-1660.Google Scholar
  4. Domonkos P., 1998: Statistical characteristics of extreme temperature anomaly groups in Hungary. Theor. Appl. Climatol., 59, 165-179.Google Scholar
  5. Gershunov A. and Barnett T.P., 1998: ENSO influence on intraseasonal extreme rainfall and temperature frequencies in the contiguous United States-observations and model results. J. Climate, 11, 1575-1586.Google Scholar
  6. Gregory J.M., Mitchell J.F.B. and Brady A.J., 1997: Summer drought in northern midlatitudes in a time-dependent CO2 climate experiment. J. Climate, 10, 662-686.Google Scholar
  7. Hennessy K.J. and Pittock A.B., 1995: Greenhouse warming and threshold temperature events in Victoria, Australia. Int. J. Climatol., 15, 591-612.Google Scholar
  8. Hennessy K.J., Gregory J.M. and Mitchell J.F.B., 1997: Changes in daily precipitation under enhanced greenhouse conditions. Climate Dyn., 13, 667-680.Google Scholar
  9. Houghton J.T., Meira Filho L.G., Callander B.A., Harris N., Kattenberg A., Maskell K. (eds.), 1996: Climate Change 1995. The Science of Climate Change. Cambridge University Press, Cambridge, 572 pp.Google Scholar
  10. Huth R. and Kyselý J., 1998: A GCM simulation of heat waves in central Europe. In: The Second International Climate and History Conference. University of East Anglia, Norwich, UK, 7–11 September 1998, 74-75.Google Scholar
  11. Huth R., Kyselý J. and Pokorná L., 1999: A GCM simulation of heat waves, dry spells, and their relationships to circulation. Climatic Change (in print).Google Scholar
  12. Joubert A.M., Mason S.J. and Galpin J.S., 1996: Droughts over southern Africa in a doubled CO2 climate. Int. J. Climatol., 16, 1149-1156.Google Scholar
  13. Kalvová J. and Nemešová I., 1998: Estimating autocorrelations of daily extreme temperatures in observed and simulated climates. Theor. Appl. Climatol., 59, 151-164.Google Scholar
  14. Karl T.R. and Knight R.W., 1997: The 1995 Chicago heat wave: How likely is a recurrence? Bull. Amer. Meteor. Soc., 78, 1107-1119.Google Scholar
  15. Karl T.R. and Easterling D.R., 1999: Climate extremes-selected review and future-research directions. Clim. Change, 42, 309-325.Google Scholar
  16. Katz R.W. and Brown B.G., 1992: Extreme events in a changing climate: Variability is more important than averages. Clim. Change, 21, 289-302.Google Scholar
  17. Kirschbaum M.U.F., 1996: Ecophysiological, ecological, and soil processes in terrestrial ecosystems: A primer on general concepts and relationships. In: Watson R.T., Zinyowera M.C., Moss R.H. and Dokken D.J. (eds.), Climate Change 1995. Impacts, Adaptations and Mitigation of Climate Change: Scientific-Technical Analyses, Cambridge University Press, Cambridge, 57-74.Google Scholar
  18. Krška K. and Munzar J., 1984: Temperature peculiarities of the tropic summer 1983 in Czechoslovakia and in Europe. Meteorol. Zpr., 37, 33-40 (in Czech).Google Scholar
  19. Krška K. and Racko S., 1993: The hot summer 1992 in the Czech and the Slovak Republic; its synoptic interpretation and climatological evaluation. Meteorol. Zpr., 46, 33-41 (in Czech).Google Scholar
  20. Krška K. and Racko S., 1996: Extra-ordinary hot summer 1994 in the Czech and the Slovak Republic. Meteorol. Zpr., 49, 12-21 (in Czech).Google Scholar
  21. Kunkel K.E., Changnon S.A., Reinke B.C. and Arritt R.W., 1996: The July 1995 heat wave in the Midwest: A climatic perspective and critical weather factors. Bull. Amer. Meteor. Soc., 77, 1507-1518.Google Scholar
  22. Květoň V. and Reinhart M., 1994: Circulation conditions of the Czech Republic and temperature conditions in the period 1961–1990. Prague, research account, NKP CR, USCS (in Czech).Google Scholar
  23. Kyselý J., 1997: Changes in secondary temperature characteristics. Diploma thesis. Faculty of Mathematics and Physics, Charles University, Prague, 187 pp (in Czech).Google Scholar
  24. Kyselý J. and Kalvová J., 1998: Heat waves in the south Moravian region in the period of 1961–1990. Meteorol. Zpr., 51, 65-72 (in Czech).Google Scholar
  25. Mason S.J. and Joubert A.M., 1997: Simulated changes in extreme rainfall over southern Africa. Int. J. Climatol., 17, 291-301.Google Scholar
  26. Mearns L.O., Katz R.W. and Schneider S.H., 1984: Extreme high temperature events: changes in their probabilities with changes in mean temperature. J. Climate Appl. Meteor., 23, 1601-1608.Google Scholar
  27. Míková T., 1995: Peculiarities in climatic characteristics and extreme events in 1994. Meteorol. Zpr., 48, 158-159 (in Czech).Google Scholar
  28. Rohli R.V. and Keim B.D., 1994: Spatial and temporal characteristics of extreme-high-summer-temperature events in the South-Central United States. Phys. Geogr., 15, 310-324.Google Scholar
  29. Sobíšek B. (ed.), 1993: Meteorological Dictionary. Academia, Prague, 594 pp (in Czech).Google Scholar
  30. Steadman R.G., 1984: A universal scale of apparent temperature. J. Climate Appl. Meteor., 23, 1674-1687.Google Scholar
  31. Watson R.T., Zinyowera M.C., Moss R.H. and Dokken D.J. (eds.), 1996: Climate Change 1995: Impacts, Adaptations and Mitigation of Climate Change: Scientific-Technical Analyses. Cambridge University Press, Cambridge, 878 pp.Google Scholar
  32. Whitman S., Good G., Donoghue E.R., Benbow N., Shou W.Y. and Mou S.X., 1997: Mortality in Chicago attributed to the July 1995 heat wave. American Journal of Public Health, 87, 1515-1518.Google Scholar
  33. Wigley T.M.L., 1985: Impact of extreme events. Nature, 316, 106-107.Google Scholar

Copyright information

© StudiaGeo s.r.o. 2000

Authors and Affiliations

  • Jan Kyselý
    • 1
    • 2
  • Jaroslava Kalvová
    • 3
  • Vít Květoň
    • 4
  1. 1.Department of Meteorology and Environment Protection, Faculty of Mathematics and PhysicsCharles UniversityPragueCzech Republic
  2. 2.Institute of Atmospheric PhysicsAcad. Sci. Czech RepublicPrague 4Czech Republic
  3. 3.Department of Meteorology and Environment Protection, Faculty of Mathematics and PhysicsCharles UniversityPragueCzech Republic
  4. 4.Czech Hydrometeorological InstitutePragueCzech Republic

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