干旱区生态环境知识资源中心(Arid): Synoptic aspects associated with pervasive dust storms in the southwestern regions of Iran

Arid

DOI	10.28974/idojaras.2021.1.8
	Synoptic aspects associated with pervasive dust storms in the southwestern regions of Iran
	Sedaghat, Mahdi; Hajimohammadi, Hasan; Shafaie, Vahid
通讯作者	Sedaghat, M (corresponding author), Payame Noor Univ PNU, Dept Geog, Tehran, Iran.
来源期刊	IDOJARAS
ISSN	0324-6329
出版年	2021
卷号	125 期号:1 页码:151-166
英文摘要	Dust storm is a natural hazardous phenomenon that affects arid and semi-arid regions of the world the same as Iran. The present research aims to investigate the formation of synoptic patterns of pervasive dust storms (PDSs) in the southwestern regions of Iran. For this purpose, daily data of visibility less than 1000m in 16 synoptic stations (Ilam and Khuzestan provinces) were reviewed during 2004-2017, and 59 PDSs with more than 2 days of duration (overlapped: 70% of the region) were extracted. In practice, mid-level atmospheric data (500, 700, 850 hPa, and sea level pressure (SLP)) with 2.52.5 degree resolution (domain: 0-80 degrees E and 10-70 degrees N) were obtained from NCEP/NCAR reanalysis dataset, and the matrix 82559 of 500 hPa data was performed. Principal component analysis (PCA) with S-mod, were used for extracting synoptic patterns that make PDSs. PCA showed that the first four components ensured more than 86.45% of the data variance. PDSs classification based on output components showed that the patterns had seasonal structures. Synoptically, the north wind blowing in the first pattern is the most dominant structure in the formation of PDSs in the Middle East. The second and third patterns showed postfrontal structures. The fourth pattern with prefrontal structure was the reason for PDSs in the cold seasons of the year. From the four final patterns, the first three patterns showed the dominance of the Persian trough in the SLP maps. Mean values map analysis of the aerosol optical depth suggests that each of the most consistent synoptic patterns stimulates special dust centers.
英文关键词	pervasive dust storms synoptic climatology PCA persian trough Iran
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000630191000008
WOS关键词	ASIAN DUST ; CLIMATOLOGY ; CHINA ; IMPACTS
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350524
作者单位	[Sedaghat, Mahdi] Payame Noor Univ PNU, Dept Geog, Tehran, Iran; [Hajimohammadi, Hasan] Tarbiat Modares Univ, Tehran, Iran; [Shafaie, Vahid] Univ Tehran, Tehran, Iran
推荐引用方式 GB/T 7714	Sedaghat, Mahdi,Hajimohammadi, Hasan,Shafaie, Vahid. Synoptic aspects associated with pervasive dust storms in the southwestern regions of Iran[J],2021,125(1):151-166.
APA	Sedaghat, Mahdi,Hajimohammadi, Hasan,&Shafaie, Vahid.(2021).Synoptic aspects associated with pervasive dust storms in the southwestern regions of Iran.IDOJARAS,125(1),151-166.
MLA	Sedaghat, Mahdi,et al."Synoptic aspects associated with pervasive dust storms in the southwestern regions of Iran".IDOJARAS 125.1(2021):151-166.