干旱区生态环境知识资源中心(Arid): Spatial assessment of meteorological drought features over different climate regions in Iran

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DOI	10.1002/joc.6307
	Spatial assessment of meteorological drought features over different climate regions in Iran
	Sharafati, Ahmad 1; Nabaei, Sina 1,2; Shahid, Shamsuddin 3
通讯作者	Sharafati, Ahmad
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2020
卷号	40 期号:3 页码:1864-1884
英文摘要	Iran has a predominantly arid and semi-arid climate where the drought hazards and their variability are the crucial concerns for water resources management. This study assesses the characteristics and trends of meteorological droughts features in different climate regions of Iran. Monthly rainfall data are analysed using Standardized Precipitation Index (SPI) to reconstruct meteorological droughts for different time steps (1, 3, 6, 9 and 12). The drought events are decomposed into three features, namely Severity (S), Duration (D) and Peak (P) to assess their spatial variations in different climate regions. The Mann-Kendall (MK) test is used to detect the trends in drought features in different climate regions. The percentage area (PA) of increasing/decreasing trend in drought features is computed to assess the spatial variations of trends in each region. Besides, SPI is compared with Standardized Precipitation Evapotranspiration Index (SPEI) to understand the importance of evapotranspiration on meteorological droughts. The high correlations between SPI and SPEI indicate that the results obtained using SPI would not vary if a similar analysis is conducted using SPEI. The results obtained using SPI reveal that short-duration droughts (6 months or less) are more frequent and severe in the northwest and the north along the Caspian plains while the longer-duration droughts (more than 6 months) are more frequent and severe in the south, southeast and southwest. Overall, the northwest region of Iran is found most susceptible to droughts in terms of S, P and D. Moderate (40% < PA < 60%) or significant (PA > 60%) increase in the drought features are observed in all climate regions for shorter SPI (3 months or less) except northwest, while no drought feature is found to increase significantly for SPI-12. Overall, the higher increase in drought S, P and D are found in the central arid region and at higher altitudes.
英文关键词	drought Iran Mann-Kendall trend test Standardized Precipitation Index
类型	Article
语种	英语
国家	Iran ; Malaysia
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000491040600001
WOS关键词	TREND ANALYSIS ; SEMIARID REGIONS ; AGRICULTURAL DROUGHT ; INDEX RDI ; PRECIPITATION ; VARIABILITY ; RAINFALL ; EVAPOTRANSPIRATION ; SEVERITY ; FREQUENCY
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
EI主题词	2019-10-07
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310265
作者单位	1.Islamic Azad Univ, Sci & Res Branch, Dept Civil Engn, Tehran, Iran; 2.Islamic Azad Univ, Sci & Res Branch, Young Researchers & Elites Club, Tehran, Iran; 3.UTM, Fac Engn, Sch Civil Engn, Johor Baharu, Malaysia
推荐引用方式 GB/T 7714	Sharafati, Ahmad,Nabaei, Sina,Shahid, Shamsuddin. Spatial assessment of meteorological drought features over different climate regions in Iran[J],2020,40(3):1864-1884.
APA	Sharafati, Ahmad,Nabaei, Sina,&Shahid, Shamsuddin.(2020).Spatial assessment of meteorological drought features over different climate regions in Iran.INTERNATIONAL JOURNAL OF CLIMATOLOGY,40(3),1864-1884.
MLA	Sharafati, Ahmad,et al."Spatial assessment of meteorological drought features over different climate regions in Iran".INTERNATIONAL JOURNAL OF CLIMATOLOGY 40.3(2020):1864-1884.