Knowledge Resource Center for Ecological Environment in Arid Area
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, Tehseen1,2; Yao, Ning1; Chen, Xinguo1; Suon, Sovannaka1; Li, Yi1,2 | |
通讯作者 | Li, Yi |
会议名称 | 14th International Francophone Symposium on Aquatic Ecotoxicology (EcoBIM) - From Legacy Pollutants to Emerging Contaminants |
会议日期 | MAY 22-25, 2018 |
会议地点 | Bordeaux, FRANCE |
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 |
来源出版物 | 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 |
出版者 | SPRINGER HEIDELBERG |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E ; CPCI-S |
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 |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/313858 |
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[C]:SPRINGER HEIDELBERG,2020:4258-4274. |
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