Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/rs70404391 |
Drought Variability and Land Degradation in Semiarid Regions: Assessment Using Remote Sensing Data and Drought Indices (1982-2011) | |
Vicente-Serrano, Sergio M.1; Cabello, Daniel2,3; Tomas-Burguera, Miquel4; Martin-Hernandez, Natalia1; Begueria, Santiago4; Azorin-Molina, Cesar1; El Kenawy, Ahmed5,6 | |
通讯作者 | Vicente-Serrano, Sergio M. |
来源期刊 | REMOTE SENSING |
ISSN | 2072-4292 |
出版年 | 2015 |
卷号 | 7期号:4页码:4391-4423 |
英文摘要 | We analyzed potential land degradation processes in semiarid regions worldwide using long time series of remote sensing images and the Normalized Difference Vegetation Index (NDVI) for the period 1981 to 2011. The objectives of the study were to identify semiarid regions showing a marked decrease in potential vegetation activity, indicative of the occurrence of land degradation processes, and to assess the possible influence of the observed drought trends quantified using the Standardized Precipitation Evapotranspiration Index (SPEI). We found that the NDVI values recorded during the period of maximum vegetation activity (NDVImax) predominantly showed a positive evolution in the majority of the semiarid regions assessed, but NDVImax was highly correlated with drought variability, and the trends of drought events influenced trends in NDVImax at the global scale. The semiarid regions that showed most increase in NDVImax (the Sahel, northern Australia, South Africa) were characterized by a clear positive trend in the SPEI values, indicative of conditions of greater humidity and lesser drought conditions. While changes in drought severity may be an important driver of NDVI trends and land degradation processes in semiarid regions worldwide, drought did not apparently explain some of the observed changes in NDVImax. This reflects the complexity of vegetation activity processes in the world’s semiarid regions, and the difficulty of defining a universal response to drought in these regions, where a number of factors (natural and anthropogenic) may also affect on land degradation. |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Saudi Arabia ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000354789300045 |
WOS关键词 | DIFFERENCE VEGETATION INDEX ; RAIN-USE-EFFICIENCY ; AVHRR-NDVI DATA ; NOAA-AVHRR ; GLOBAL ASSESSMENT ; PLANT-RESPONSES ; SOUTHERN AFRICA ; CLIMATE-CHANGE ; SOIL-MOISTURE ; DESERTIFICATION |
WOS类目 | Remote Sensing |
WOS研究方向 | Remote Sensing |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190154 |
作者单位 | 1.Spanish Natl Res Council IPE CSIC, Inst Pirena Ecol, E-50059 Zaragoza, Spain; 2.Univ Alcala De Henares, Dept Econ, E-28801 Madrid, Spain; 3.Madrid Inst Adv Studies Water IMDEA Water, E-28805 Madrid, Spain; 4.Spanish Natl Res Council EEAD CSIC, Estn Expt Aula Dei, E-50059 Zaragoza, Spain; 5.King Abdullah Univ Sci & Technol, Hydrol Modeling & Earth Observat Grp, WDRC, Thuwal 239556900, Saudi Arabia; 6.Mansoura Univ, Dept Geog, Mansoura 35516, Egypt |
推荐引用方式 GB/T 7714 | Vicente-Serrano, Sergio M.,Cabello, Daniel,Tomas-Burguera, Miquel,et al. Drought Variability and Land Degradation in Semiarid Regions: Assessment Using Remote Sensing Data and Drought Indices (1982-2011)[J],2015,7(4):4391-4423. |
APA | Vicente-Serrano, Sergio M..,Cabello, Daniel.,Tomas-Burguera, Miquel.,Martin-Hernandez, Natalia.,Begueria, Santiago.,...&El Kenawy, Ahmed.(2015).Drought Variability and Land Degradation in Semiarid Regions: Assessment Using Remote Sensing Data and Drought Indices (1982-2011).REMOTE SENSING,7(4),4391-4423. |
MLA | Vicente-Serrano, Sergio M.,et al."Drought Variability and Land Degradation in Semiarid Regions: Assessment Using Remote Sensing Data and Drought Indices (1982-2011)".REMOTE SENSING 7.4(2015):4391-4423. |
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