干旱区生态环境知识资源中心(Arid): The relationship between the Normalized Difference Vegetation Index and drought indices in the South Central United States

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DOI	10.1007/s11069-019-03569-5
	The relationship between the Normalized Difference Vegetation Index and drought indices in the South Central United States
	Bushra, Nazla 1; Rohli, Robert V.1; Lam, Nina S. N.2; Zou, Lei 2; Mostafiz, Rubayet Bin 1; Mihunov, Volodymyr 2
通讯作者	Bushra, Nazla
来源期刊	NATURAL HAZARDS
ISSN	0921-030X
EISSN	1573-0840
出版年	2019
卷号	96 期号:2 页码:791-808
英文摘要	Drought indices are useful for quantifying drought severity and have shown mixed success as an indicator of drought damage and biophysical dryness. While spatial downscaling of drought indicators from the climate divisional level to the county level has been conducted successfully in previous work, little research to date has attempted to upscale remotely sensed biophysical indicators to match the downscaled drought indices. This upscaling is important because drought damage and indices are often reported at a coarser scale than the biophysical indicators provide. This research upscales National Oceanic and Atmospheric Administration's Advanced Very High Resolution Radiometer sensor-acquired Normalized Difference Vegetation Index (NDVI) data to produce a county-level biophysical drought index, for a five-state region of the South Central United States. The county-level NDVI is then correlated with the downscaled drought indices for assessing the degree to which the biophysical data match well-documented drought indicators. Results suggest that the Palmer Drought Severity Index and Palmer Hydrologic Drought Index are effective indicators of biophysical drought in much of the arid western part of the study area and in larger swaths of the study area in summer. In nearly all cases except for autumn months, correlations are weakest in the ecotones, with significant negative correlations in the humid eastern part of the study area. Results generally corroborate the findings of recent research that correlations between drought indices and biophysical drought vary spatially. As long-lead climate forecasts continue to improve, these results can assist environmental planners in preparing for the impacts of drought.
英文关键词	Drought Statistical upscaling Palmer Drought Severity Index Palmer Hydrologic Drought Index Normalized Difference Vegetation Index South Central United States
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000472974200012
WOS关键词	SEVERITY INDEX ; METEOROLOGICAL DROUGHT ; RESPONSE INDEX ; SOIL-MOISTURE ; AGRICULTURAL DROUGHT ; SENSITIVITY-ANALYSIS ; RIVER-BASIN ; ARID REGION ; INDIA ; VARIABILITY
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217712
作者单位	1.Louisiana State Univ, Coll Coast & Environm, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA; 2.Louisiana State Univ, Coll Coast & Environm, Dept Environm Sci, Baton Rouge, LA 70803 USA
推荐引用方式 GB/T 7714	Bushra, Nazla,Rohli, Robert V.,Lam, Nina S. N.,et al. The relationship between the Normalized Difference Vegetation Index and drought indices in the South Central United States[J],2019,96(2):791-808.
APA	Bushra, Nazla,Rohli, Robert V.,Lam, Nina S. N.,Zou, Lei,Mostafiz, Rubayet Bin,&Mihunov, Volodymyr.(2019).The relationship between the Normalized Difference Vegetation Index and drought indices in the South Central United States.NATURAL HAZARDS,96(2),791-808.
MLA	Bushra, Nazla,et al."The relationship between the Normalized Difference Vegetation Index and drought indices in the South Central United States".NATURAL HAZARDS 96.2(2019):791-808.