干旱区生态环境知识资源中心(Arid): A study of dry spells in Iran based on satellite data and their relationship with ENSO

Arid

DOI	10.1007/s00704-021-03607-y
	A study of dry spells in Iran based on satellite data and their relationship with ENSO
	Rezaei, Mohammad; Rousi, Efi; Ghasemifar, Elham; Sadeghi, Ali
通讯作者	Rezaei, M (corresponding author), Tarbiat Modares Univ, Dept Climatol, Tehran, Iran.
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2021
卷号	144 期号:3-4 页码:1387-1405
英文摘要	The study of the maximum number of consecutive dry days (MCDDs) is one approach to analyze precipitation behavior in arid and semi-arid regions of Iran. This study is a first attempt to investigate the MCDDs and their relationship with the El Nino/Southern Oscillation (ENSO) in winter months over Iran. The study was carried out using Tropical Rainfall Measuring Mission (TRMM) satellite data on a daily basis at 1 degrees latitude x 1 degrees longitude spatial resolution and reanalysis data for the period 1998-2019. Results showed that the highest values of MCDDs are observed in southeastern Iran and the lowest in northwestern Iran. Based on the coefficients of the linear trend of the MCDDs, the significant increasing trends are remarkably more abundant than declining trends, especially in the northern half of the country in December and January. The results regarding the relationship between ENSO and MCDDs indicated a non-stationary behavior, with a significant negative correlation for December (especially in the southwest) and positive correlation for January and February (especially in the southeast). The largest differences in the correlation coefficients were observed between December and January. In general, during El Nino (La Nina) phases, the length of MCDDs decreases (increases) in December and increases (decreases) in January especially in the southern half. By comparing different large-scale climate parameters for the 2 months, we found that during El Nino (La Nina) phases, a negative (positive) anomaly of geopotential height and a positive (negative) anomaly of zonal wind and specific humidity are observed over the region in December, while the opposite situation occurs in January. The innovation of this study is the use of satellite data that provide a continuous spatial coverage of the region and the consideration of the ENSO teleconnection pattern in regards to dry spells. We find that El Nino (La Nina) has contradictory effects on MCDDs in different winter months in the southern half of the country. These findings are of great importance for a country like Iran that lies in arid and semi-arid regions, as they can be useful for water resources management.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000638518300001
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/2XILL650/351885
作者单位	[Rezaei, Mohammad; Ghasemifar, Elham] Tarbiat Modares Univ, Dept Climatol, Tehran, Iran; [Rousi, Efi] Leibniz Assoc, Potsdam Inst Climate Impact Res PIK, Potsdam, Germany; [Sadeghi, Ali] Farhangian Univ, Dept Geog, Tehran, Iran
推荐引用方式 GB/T 7714	Rezaei, Mohammad,Rousi, Efi,Ghasemifar, Elham,et al. A study of dry spells in Iran based on satellite data and their relationship with ENSO[J],2021,144(3-4):1387-1405.
APA	Rezaei, Mohammad,Rousi, Efi,Ghasemifar, Elham,&Sadeghi, Ali.(2021).A study of dry spells in Iran based on satellite data and their relationship with ENSO.THEORETICAL AND APPLIED CLIMATOLOGY,144(3-4),1387-1405.
MLA	Rezaei, Mohammad,et al."A study of dry spells in Iran based on satellite data and their relationship with ENSO".THEORETICAL AND APPLIED CLIMATOLOGY 144.3-4(2021):1387-1405.