Spatio-temporal evaluation of extreme cold temperatures of Iran under the effects of global warming to reduce risks of hazards

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OMIDVAR KAMAL; EBRAHIMI REZA; DADASHI ROUDBARI ABBAS ALI; Malek Mirzayi Maryam

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Journal: ENVIRONMENTAL HAZARDS MANAGEMENT Year:2016 | Volume:2 | Issue:4 Page(s): 423-437

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Title

Spatio-temporal evaluation of extreme cold temperatures of Iran under the effects of global warming to reduce risks of hazards

Author(s)

OMIDVAR KAMAL | EBRAHIMI REZA | DADASHI ROUDBARI ABBAS ALI | Malek Mirzayi Maryam | Issue Writer Certificate

Keywords

cold extreme temperatureQ2

EH5OM modelQ2

IranQ2

REGCM4 modelQ2

SOM clusteringQ2

Abstract

The territorial changes are of great importance in recent years due to economic and social consequences and financial losses related to their abnormal incidents to decrease the risks. In management system, the prediction and recognition of abnormal risks is considered as the main features of the system. Therefore, the purpose of the present research is to discover the universal thermal effects in emerging Iran cold extremes in the future decades because recognition of these areas and their zoning is considered as an important step to decrease their risks. For this purpose, the data are uploaded on the daily temperature EH5OM model in the Max Plank Society of Germany during a statistical period (2015-2050) under the scenario of AIB with curve degree sorting of 1. 75 for Iran realm. The mentioned data are micro scaled with local sorting on the curve 0. 27 􀳋 0. 27 by REGCM4 model. In order to recognize the cold extreme days, the normalized temperature deviation (NTD) is used. The data are organized based on this index and the extension of the heat governance (NTD < 0) and the first 500 days for which the condition NTD <-2 are met. These are considered as the sample population. In this respect, a range with a size 500 􀳋 2140 is established. The results of the study indicate that Iran can be divided into 9 areas in terms of cold extremes by the use of clusters analysis based on self-organizing map (SOM). In the future decades, the cold extremes in the west and high lines (mountains and mountainsides) can be observed more than internal lines and south shores. The minimum and maximum for the cold extreme occurrence can be observed in Kavir-e Namak and the northwest Iran, respectively.

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APA: Copy

OMIDVAR, KAMAL, EBRAHIMI, REZA, DADASHI ROUDBARI, ABBAS ALI, & Malek Mirzayi, Maryam. (2016). Spatio-temporal evaluation of extreme cold temperatures of Iran under the effects of global warming to reduce risks of hazards. ENVIRONMENTAL HAZARDS MANAGEMENT, 2(4 ), 423-437. SID. https://sid.ir/paper/265014/en

Vancouver: Copy

OMIDVAR KAMAL, EBRAHIMI REZA, DADASHI ROUDBARI ABBAS ALI, Malek Mirzayi Maryam. Spatio-temporal evaluation of extreme cold temperatures of Iran under the effects of global warming to reduce risks of hazards. ENVIRONMENTAL HAZARDS MANAGEMENT[Internet]. 2016;2(4 ):423-437. Available from: https://sid.ir/paper/265014/en

IEEE: Copy

KAMAL OMIDVAR, REZA EBRAHIMI, ABBAS ALI DADASHI ROUDBARI, and Maryam Malek Mirzayi, “Spatio-temporal evaluation of extreme cold temperatures of Iran under the effects of global warming to reduce risks of hazards,” ENVIRONMENTAL HAZARDS MANAGEMENT, vol. 2, no. 4 , pp. 423–437, 2016, [Online]. Available: https://sid.ir/paper/265014/en

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