干旱区生态环境知识资源中心(Arid): Evaluation of the suitability of six drought indices in naturally growing, transitional vegetation zones in Inner Mongolia (China)

Arid

DOI	10.1371/journal.pone.0233525
	Evaluation of the suitability of six drought indices in naturally growing, transitional vegetation zones in Inner Mongolia (China)
	Wang, Yuqing 1; Zhang, Chengfu 1; Meng, Fan-Rui 2; Bourque, Charles P. -A.2; Zhang, Cunhou 3
通讯作者	Zhang, Chengfu
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2020
卷号	15 期号:5
英文摘要	Naturally growing vegetation often suffers from the effects of drought. There exists a vast number of drought indices (DI's) to assess the impact of drought on the growth of crops and naturally occurring vegetation. However, assessing the fitness of these indices for large areas with variable vegetation cover is often problematic because of the absence of adequate spatial information. In this study, we compared six DI's to NDVI (the normalized difference vegetation index), a common indicator of vegetation occurrence and health based on satellite-acquired reflectance data. The study area covers an aridity gradient from forests to deserts along a 2,400-km-long section across the Inner Mongolia Autonomous Region of China. On an annual timescale, standardized precipitation index (SPI) was the most appropriate in assessing drought in steppes and deserts. On a seasonal timescale, the self-calibrated Palmer drought severity index (scPDSI) displayed the greatest sensitivity during the summer, but not during the other seasons. On a monthly timescale, scPDSI demonstrated the greatest sensitivity to the various vegetation zones (i.e., forests, steppes, and deserts) in June and July. Further analysis indicated that summer drought had a lag-effect on vegetation growth, which varied from one to six months according to the specific vegetation cover. The mixed response of DI's to NDVI and the lag-effect in transitional vegetation on annual, seasonal, and monthly timescales were ascribed to differences in DI definition and the dominant plant species within the transitional cover. The current study has the potential to inform the drafting of selection criteria of DI's for the study of drought-related impact on naturally growing vegetation at timescales from month to year.
类型	Article
语种	英语
国家	Peoples R China ; Canada
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000537552800088
WOS关键词	CLIMATE-CHANGE ; RESPONSES ; NDVI ; PRECIPITATION ; PRODUCTIVITY ; TEMPERATURE ; GRASSLAND ; SEASONALITY ; PATTERNS ; IMPACTS
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/2XILL650/319191
作者单位	1.Inner Mongolia Agr Univ, Coll Desert Sci & Engn, Hohhot, Inner Mongolia, Peoples R China; 2.Univ New Brunswick, Fac Forestry & Environm Management, Fredericton, NB, Canada; 3.Ecol & Agr Ctr Inner Mongolia, Hohhot, Inner Mongolia, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yuqing,Zhang, Chengfu,Meng, Fan-Rui,et al. Evaluation of the suitability of six drought indices in naturally growing, transitional vegetation zones in Inner Mongolia (China)[J],2020,15(5).
APA	Wang, Yuqing,Zhang, Chengfu,Meng, Fan-Rui,Bourque, Charles P. -A.,&Zhang, Cunhou.(2020).Evaluation of the suitability of six drought indices in naturally growing, transitional vegetation zones in Inner Mongolia (China).PLOS ONE,15(5).
MLA	Wang, Yuqing,et al."Evaluation of the suitability of six drought indices in naturally growing, transitional vegetation zones in Inner Mongolia (China)".PLOS ONE 15.5(2020).