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Effects of Global Warming on Precipitation Extremes: Dependence on Storm Characteristics

Author

Listed:
  • Abhishek Gaur

    (National Research Council Canada)

  • Andre Schardong

    (Western University)

  • Slobodan Simonovic

    (Western University)

Abstract

This study investigates the relationship between historically observed changes in extreme precipitation magnitudes and temperature (Pex-T relationship) at multiple locations in Canada. The focus is on understanding the behavior of these relationships with regards to key storm characteristics such as its duration, season of occurrence, and location. To do so, three locations are chosen such that they have large amounts of moisture available near them whereas four locations are chosen such that they are located in the land-locked regions of Canada and subsequently have no nearby moisture source available on them. To investigate the effect of different storm durations on Pex-T relationship, storms of durations: 5, 10, 15, 30 min, 1, 2, 6, 12, 24 h are considered. Finally, Pex-T relationship is analyzed separately for summer and winter seasons to quantify the influence of seasons. Results indicate strong influences of storm duration, season of occurrence, and location on observed precipitation scaling rates. Drastic intensification of precipitation extremes with temperature is obtained for shorter duration precipitation events than for longer duration precipitation events, in summers than in the winters. Furthermore, in summertime, increases in the intensity of convection driven precipitation extremes is found highest at locations away from large waterbodies. On the other hand, in wintertime most drastic increases in extreme precipitation are obtained at locations near large waterbodies. These findings contribute towards increasing the current understanding of precipitation extremes in the context of rapidly increasing global temperatures.

Suggested Citation

  • Abhishek Gaur & Andre Schardong & Slobodan Simonovic, 2018. "Effects of Global Warming on Precipitation Extremes: Dependence on Storm Characteristics," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 32(8), pages 2639-2648, June.
    • Handle: RePEc:spr:waterr:v:32:y:2018:i:8:d:10.1007_s11269-018-1949-x
    DOI: 10.1007/s11269-018-1949-x
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