干旱区生态环境知识资源中心(Arid): Drought evolution indicated by meteorological and remote-sensing drought indices under different land cover types in China

Arid

DOI	10.1007/s11356-019-06629-2
	Drought evolution indicated by meteorological and remote-sensing drought indices under different land cover types in China
	Javed, Tehseen 1,2; Yao, Ning 1; Chen, Xinguo 1; Suon, Sovannaka 1; Li, Yi 1,2
通讯作者	Li, Yi
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
出版年	2020
卷号	27 期号:4 页码:4258-4274
英文摘要	Remote sensing freely provides many processed image products such as moderate resolution imaging spectroradiometer (MODIS), and long-termdata record (LTDR), for the investigation of drought evolution. Our objectives are to investigate drought evolution and spatiotemporal variations from 1982 to 2017 based on two remote-sensing indices, namely, the normalized difference vegetation index (NDVI) and the vegetation condition index (VCI), and a popular meteorological index-standardized precipitation index (SPI)-under four different land cover types, cropland, forestland, grassland, and desertland in China. The modified Mann-Kendall test was used to detect the significance of a trend. The Pearson correlation method was used to find the relationship between NDVI anomaly, VCI, precipitation, and SPI. The results revealed that (a) both mean monthly and yearly precipitation had a general land cover type rank of forestland > grassland approximate to cropland > desertland. (b) A positive correlation was found between drought indices (NDVI anomaly, VCI, SPI) and precipitation for different land cover types. The NDVI anomaly and VCI were well correlated with 3-month SPI for cropland and were well correlated with 6-month SPI for forestland. VCI performed better thanNDVI anomaly when correlating with SPI. (c) The coefficient of determination (R-2) was obtained for precipitation and VCI in the driest (2011) and wettest (2016) years. The R-2 values for desert and grassland ranged from 0.70 to 0.90 and for cropland and forestland were lower (0.54-0.69). (d) Only precipitation, SPI, and VCI of cropland had significant increasing trends. The spatial distribution patterns of precipitation, NDVI, and VCI increased with the decreased elevation. The study revealed that desert and grassland had been regularly exposed to moderate or extreme droughts conditions and confirmed that desert and grassland are more sensitive to short-term drought.
英文关键词	Drought indices Land cover type Modified Mann-Kendall test Precipitation Remote sensing
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000519703100063
WOS关键词	AGRICULTURAL DROUGHT ; MAINLAND CHINA ; PRECIPITATION ; VEGETATION ; REGION ; RESPONSES ; GRASSLAND ; CLIMATE ; TRENDS ; FOREST
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314458
作者单位	1.Northwest A&F Univ, Coll Water Resources & Architecture Engn, Yangling 712100, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Javed, Tehseen,Yao, Ning,Chen, Xinguo,et al. Drought evolution indicated by meteorological and remote-sensing drought indices under different land cover types in China[J]. 西北农林科技大学,2020,27(4):4258-4274.
APA	Javed, Tehseen,Yao, Ning,Chen, Xinguo,Suon, Sovannaka,&Li, Yi.(2020).Drought evolution indicated by meteorological and remote-sensing drought indices under different land cover types in China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,27(4),4258-4274.
MLA	Javed, Tehseen,et al."Drought evolution indicated by meteorological and remote-sensing drought indices under different land cover types in China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 27.4(2020):4258-4274.