Climate Change Impact on Precipitation Extreme Events in Uncertainty Situation;Passing from Global Scale to Regional Scale
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 28، شماره: 8
سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 612
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شناسه ملی سند علمی:
JR_IJE-28-8_005
تاریخ نمایه سازی: 15 آذر 1394
چکیده مقاله:
Global warming, and consequently climate change are important topics studied extensively by researchers throughout the world in the recent decades where changes in climatic parameters areinvestigated. Considering large-scaled output of AOGCMs and low precision in computational cells,uncertainty analysis is one of the principles in hydrological studies. For this reason, the uncertainty due to precision of computational cells and in passing from global scale to regional scale through LARSWGmodel and CRU institute, precipitation changes in Mashhad synoptic station located inGhareghom basin were analyzed. The results showed enough ability of the model to simulate precipitation parameter in the base period. Downscaled output of HadCM3 generated by CRU withhigh precision shows gradual decreasing of precipitation trend for frequency and sum values.Comparing the downscaled output of the AOGCM with 2.5*3.75 resolution and the output of CRU with 0.5*0.5 resolution, the uncertainty is due to precision of computational cells from global to regional scale: the latter scale is closer to real values
کلیدواژه ها:
نویسندگان
m.j Khordadi
Ferdowsi University of Mashhad, Mashhad, Iran
a Alizadeh
Ferdowsi University of Mashhad, Mashhad, Iran
m Nassiri Mahallati
Ferdowsi University of Mashhad, Mashhad, Iran
h Ansari
Ferdowsi University of Mashhad, Mashhad, Iran