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Climatic Change

, Volume 113, Issue 3–4, pp 883–896 | Cite as

Changing trends of thermal extremes in Pakistan

  • Maida ZahidEmail author
  • Ghulam Rasul
Article

Abstract

Extreme events have gained considerable scientific attention recently due to their potentially catastrophic impacts. Heat waves are thought to be more pronounced now in most parts of the world, and especially in South Asia, but doubts remain. The aim of this study is to calculate the frequency and intensity of heat waves in South Asia, focusing on Pakistan and identifying the regions within Pakistan that are most vulnerable to heat waves. Analyses have been performed both at provincial and country levels from 1961 to 2009. The provincial level analysis shows positive trends for heat waves of magnitudes ≥40°C and ≥45°C for 5 and 7 consecutive days. Events of magnitude ≥40°C and ≥45°C for 10 consecutive days also increased in frequency in Punjab, Sindh, and Balochistan. These regions are therefore considered to be the regions most vulnerable to heat wave events in Pakistan. The Balochistan region shows a consistently increasing trend throughout the study period, which may lead to more frequent drought in the future. The country level analysis indicates an increase in the frequency of 5 and 7 consecutive days heat waves at all defined temperature thresholds. The 10-days heat waves spells show a slight increase at ≥40°C and no significant change at ≥45°C. The Gilgit Baltistan and Azad Jammu & Kashmir areas reported no events at ≥45°C for 5, 7 and 10 continuous days. It is anticipated that with a long term rise in temperatures around the globe, heat waves will become more frequent and intense in all parts of the world, including Pakistan.

Keywords

Heat Wave ENSO Event Heat Wave Event Summer Heat Wave Severe Heat Wave 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Chaudhary QZ, Mahmood A, Rasul G, Afzaal M (2009) Climate change indicators of Pakistan, Technical Report No. PMD-22, 1–43Google Scholar
  2. Clark RT, Brown SJ, Murphy JM (2006) Modeling Northern hemisphere summer heat extreme changes and their uncertainties using a physics ensemble of climate sensitivity experiments. J Clim 19:4418–4435CrossRefGoogle Scholar
  3. Cristo R, Mazzarella A, Viola R (2007) An analysis of heat index over Naples (Southern Italy) in the context of European heat wave 2003. Nat Hazard 40:373–379CrossRefGoogle Scholar
  4. Della-Marta PM, Beniston M (2008) Summer heat waves in Western Europe, their past change and future projections. Springer, pp 235–250Google Scholar
  5. Della-Marta PM, Luterbacher J, VonWeissenfluh H, Xoplaki E, Brunet M, Wanner H (2007) Summer heat waves over Western Europe 1880–2003, their relationship to large-scale forcings and predictability. Clim Dyn 29:251–275CrossRefGoogle Scholar
  6. Deshmukhe G, Ramamoorthy K, Gupta RS (2000) Impact of heat waves over India. Curr Sci 79(2):153–162Google Scholar
  7. Dousset B, Gourmelon F, Laaidi K, Zeghnoun A, Giraudet E, Bretin P, Vandentorren S (2009) Satellite monitoring of summertime heat waves in the Paris Metropolitan Area. The Seventh Climate Conference on Urban Climate (29th June–3rd July) (2009), Yokohama JapanGoogle Scholar
  8. Huang W, Kan H, Kovats S (2010) The impact of the 2003 heat wave on mortality in Shanghai, China. Sci Total Environ 408(11):2418–2420CrossRefGoogle Scholar
  9. IPCC, Asia in Climate Change (2007) Impacts, adaptation and vulnerability. Contribution of working group II to the fourth assessment report of the intergovernmental panel on climate change, Cambridge: Cambridge University Press, 469–506Google Scholar
  10. Luber G (2008) Climate change and extreme heat events. Am J Prev Med 35(5):429–435CrossRefGoogle Scholar
  11. Mahmood A, Khan TMA, Faisal N (2004) Correlation between Multivariate ENSO Index (MEI) and Pakistan’s Summer Rainfall. Pak J Meteorol 1(2):53–64Google Scholar
  12. Maida Z, Rasul G (2009) Rise in summer heat index over Pakistan. Pak J Meteorol 6(12):85–96Google Scholar
  13. McGregor GR, Nieuwolt S (1998) Tropical climatology, 2nd edn. Wiley, Ltd., UK, pp 76–80Google Scholar
  14. Meehl G, Tebaldi C (2004) More intense, more frequent, and longer lasting heat waves in the 21st century. Science 305:994–997CrossRefGoogle Scholar
  15. Mohanty P, Panda U (2003) Heatwave in Orissa: A study based on heat indices and synoptic features – heatwave conditions in Orissa. Regional Research Laboratory, Institute of Mathematics and Applications, Bubaneshwar, 15 ppGoogle Scholar
  16. Poumadère M, Mays C, Mer SL, Blong R (2005) The 2003 heat wave in France: dangerous climate change here and now. Risk Anal 25:1483–1494CrossRefGoogle Scholar
  17. 'Rashid A (2004) Impact of El-Nino on summer monsoon rainfall of Pakistan. Pak J Meteorol 1(2):35–43Google Scholar
  18. Rasul G, Dahe Q, Chaudhry QZ (2008) Global warming and melting glaciers along southern slopes of HKH ranges. Pak J Meteorol 5(9):63–76Google Scholar
  19. Rebetez M, Dupont O, Giroud M (2008) An analysis of the July 2006 heat wave extent in Europe compared to the record year of 2003. Theor Appl Climatol. doi: 10.1007/s00704-007-0370-9
  20. Robin JM, Cheung SL, Le Roy S, Van Oyen H, Griffiths C, Michel J-P, Herrmann FR (2008) Death toll exceeded 70,000 in Europe during summer of 2003. Comptes Rendus Biol 331(2):171–178CrossRefGoogle Scholar
  21. Schär C, Vidale P, Luthi D, Frei C, Haberli C, Liniger M, Appenzeller M (2004) The role of increasing temperature variability in European summer heat waves. Nature 427:332–336CrossRefGoogle Scholar
  22. Tamrazian A, Ladochy S, Willis J, Patzert WC (2008) Heat waves in Southern California: are they becoming more frequent and longer lasting? APCG Year Book 70:59–69Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Research & Development DivisionPakistan Meteorological DepartmentIslamabadPakistan

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