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DOI	10.1007/s12517-021-08531-z
	Comparison of the temporal distribution pattern of precipitation and the cumulative effect of daily droughts on the local scale in Iran
	Noorisameleh, Zahra; Gough, William A.; Mirza, M. Monirul Qader
通讯作者	Noorisameleh, Z (corresponding author)，Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C IA4, Canada.
会议名称	3rd Conference of the Arabian-Journal-of-Geosciences (CAJG)
会议日期	NOV 02-05, 2020
会议地点	ELECTR NETWORK
英文摘要	The environmental effects of drought appear to be substantial. At local scales, even small areas can have diverse climates due to their geographical location. This study compares the cumulative effect of daily droughts from 1989 to 2019 using daily precipitation data from nine synoptic stations in the Tehran Province, Iran. The Effective Drought Index (EDI), the Standardized Precipitation Index (SPI), and the China Z-Index (CZI) have been applied to calculate droughts. Initially, we have determined drought characteristics (severity, frequency, and duration) using the run theory. Later, the copula models (Frank, Gaussian, and Gumbel) have been used to find dependence between drought characteristics at different time scales as a cumulative effect. The results show that a pattern of the number and order of temporal distribution variables of precipitation play a major role in intensifying droughts. Also, the findings indicate that the frequency-duration of daily droughts in semi-arid and mountainous stations located in the north of the province has a cumulative effect on monthly and annual droughts. The severity frequency of daily droughts affects long-term droughts in the stations located in the middle and south of the province characterized by a drier climate. The variability in the intensity and shift of daily droughts in the mountainous stations is higher compared to other areas but it decreases on monthly and annual scales. This study found that the copula model is an ideal tool to demonstrate regional differences of drought in the regions with climatic and geographical diversity.
英文关键词	Drought Cumulative effect Copula model Runs theory Tehran province
来源出版物	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14
期号	20
出版者	SPRINGER HEIDELBERG
类型	Article; Proceedings Paper
语种	英语
收录类别	SCI-E ; CPCI-S
WOS记录号	WOS:000705227000001
WOS关键词	CLIMATE-CHANGE ; WATER-RESOURCES ; INDEXES ; FREQUENCY ; VARIABILITY ; VARIABLES ; SEVERITY ; RAINFALL ; IMPACTS ; BASIN
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/379058
作者单位	[Noorisameleh, Zahra; Gough, William A.; Mirza, M. Monirul Qader] Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C IA4, Canada
推荐引用方式 GB/T 7714	Noorisameleh, Zahra,Gough, William A.,Mirza, M. Monirul Qader. Comparison of the temporal distribution pattern of precipitation and the cumulative effect of daily droughts on the local scale in Iran[C]:SPRINGER HEIDELBERG,2021.