干旱区生态环境知识资源中心(Arid): Desertification of Iran in the early twenty-first century: assessment using climate and vegetation indices

Arid

DOI	10.1038/s41598-021-99636-8
	Desertification of Iran in the early twenty-first century: assessment using climate and vegetation indices
	Dameneh, Hadi Eskandari; Gholami, Hamid; Telfer, Matt W.; Comino, Jesus Rodrigo; Collins, Adrian L.; Jansen, John D.
通讯作者	Gholami, H (corresponding author), Univ Hormozgan, Dept Nat Resources Engn, Bandar Abbas, Iran.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Remote sensing of specific climatic and biogeographical parameters is an effective means of evaluating the large-scale desertification status of drylands affected by negative human impacts. Here, we identify and analyze desertification trends in Iran for the period 2001-2015 via a combination of three indices for vegetation (NPP-net primary production, NDVI-normalized difference vegetation index, LAI-leaf area index) and two climate indices (LST-land surface temperature, P-precipitation). We combine these indices to identify and map areas of Iran that are susceptible to land degradation. We then apply a simple linear regression method, the Mann-Kendall non-parametric test, and the Theil-Sen estimator to identify long-term temporal and spatial trends within the data. Based on desertification map, we find that 68% of Iran shows a high to very high susceptibility to desertification, representing an area of 1.1 million km(2) (excluding 0.42 million km(2) classified as unvegetated). Our results highlight the importance of scale in assessments of desertification, and the value of high-resolution data, in particular. Annually, no significant change is evident within any of the five indices, but significant changes (some positive, some negative) become apparent on a seasonal basis. Some observations follow expectations; for instance, NDVI is strongly associated with cooler, wet spring and summer seasons, and milder winters. Others require more explanation; for instance, vegetation appears decoupled from climatic forcing during autumn. Spatially, too, there is much local and regional variation, which is lost when the data are considered only at the largest nationwide scale. We identify a northwest-southeast belt spanning central Iran, which has experienced significant vegetation decline (2001-2015). We tentatively link this belt of land degradation with intensified agriculture in the hinterlands of Iran's major cities. The spatial and temporal trends identified with the three vegetation and two climate indices afford a cost-effective framework for the prediction and management of future environmental trends in developing regions at risk of desertification.
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000707660700049
WOS关键词	INDUCED LAND DEGRADATION ; NET PRIMARY PRODUCTION ; SOIL-EROSION ; TIME-SERIES ; TREND ANALYSIS ; MODIS NDVI ; SEDIMENT YIELD ; REGIONAL-SCALE ; RAINFALL ; VARIABILITY
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364679
作者单位	[Dameneh, Hadi Eskandari; Gholami, Hamid] Univ Hormozgan, Dept Nat Resources Engn, Bandar Abbas, Iran; [Telfer, Matt W.] Plymouth Univ, Sch Geog Earth & Environm Sci, Plymouth, Devon, England; [Comino, Jesus Rodrigo] Univ Granada, Fac Filosofia & Letras, Dept Anal Geog Reg & Geog Fis, Campus Univ Cartuja, Granada 18071, Spain; [Collins, Adrian L.] Rothamsted Res, Sustainable Agr Sci Dept, North Wyke EX20 2SB, Okehampton, England; [Jansen, John D.] Czech Acad Sci, GFU Inst Geophys, Prague, Czech Republic
推荐引用方式 GB/T 7714	Dameneh, Hadi Eskandari,Gholami, Hamid,Telfer, Matt W.,et al. Desertification of Iran in the early twenty-first century: assessment using climate and vegetation indices[J],2021,11(1).
APA	Dameneh, Hadi Eskandari,Gholami, Hamid,Telfer, Matt W.,Comino, Jesus Rodrigo,Collins, Adrian L.,&Jansen, John D..(2021).Desertification of Iran in the early twenty-first century: assessment using climate and vegetation indices.SCIENTIFIC REPORTS,11(1).
MLA	Dameneh, Hadi Eskandari,et al."Desertification of Iran in the early twenty-first century: assessment using climate and vegetation indices".SCIENTIFIC REPORTS 11.1(2021).