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Intensification of future heat waves in Pakistan: a study using CORDEX regional climate models ensemble

Author

Listed:
  • Fahad Saeed

    (Sustainable Development Policy Institute
    King Abdul-Aziz University
    Climate Analytics)

  • Mansour Almazroui

    (King Abdul-Aziz University)

  • Nazrul Islam

    (King Abdul-Aziz University)

  • Mariam Saleh Khan

    (Quaid-e-Azam University)

Abstract

Future trends in the occurrence of heat waves (HW) over Pakistan have been presented using three regional climate models (RCMs), forced by three different global climate models (GCMs) runs under RCP8.5 scenarios. The results of RCMs are obtained from CORDEX (Coordinated Regional climate Downscaling EXperiment) database. Two different approaches for the assessment of HWs are defined, namely Fixed and Relative approaches. Fixed approach is defined for a life-threatening extreme event in which the temperature can reach more than 45 °C for a continuous stretch of several days; however, Relative approach events may not be directly life-threatening, but may cause snow/ice melt flooding and impact on food security of the country in summer and winter seasons, respectively. The results indicate a consistent increase in the occurrence of HWs for both approaches. For the Fixed approach, the increase is evident in the eastern areas of Pakistan, particularly plains of Punjab and Sindh provinces which host many big cities of the country. It is argued that the effect of HWs may also be exacerbated in future due to urban heat island effect. Moreover, summer time HWs for Relative approach is most likely to increase over northern areas of the country which hosts reservoirs of snow and glacier, which may result in events like glacial lake outburst flood and snow/ice melt flooding. Furthermore, the increase in winter time HWs for Relative approach may affect negatively on the wheat production, which in turn can distress the overall food productivity and livelihoods of the country. It is concluded that this study may be a useful document for future planning in order to better adapt to these threats due to climate change.

Suggested Citation

  • Fahad Saeed & Mansour Almazroui & Nazrul Islam & Mariam Saleh Khan, 2017. "Intensification of future heat waves in Pakistan: a study using CORDEX regional climate models ensemble," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 87(3), pages 1635-1647, July.
    • Handle: RePEc:spr:nathaz:v:87:y:2017:i:3:d:10.1007_s11069-017-2837-z
    DOI: 10.1007/s11069-017-2837-z
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    References listed on IDEAS

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