English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/116090
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Drought variability and land degradation in semiarid regions: assessment using remote sensing data and drought Indices (1982–2011)

AutorVicente Serrano, Sergio M. ; Cabello, Daniel; Tomás-Burguera, Miquel ; Martín-Hernández, Natalia; Beguería, Santiago ; Azorín-Molina, César ; El Kenawy, Ahmed M.
Palabras claveStandardized Precipitation Evapotranspiration Index (SPEI)
NDVI
NOAA-AVHRR
GIMMS
desertification
vegetation recovery
Fecha de publicaciónabr-2015
EditorMultidisciplinary Digital Publishing Institute
CitaciónVicente-Serrano SM, Cabello D, Tomás-Burguera M, Martín-Hernández N, Beguería S, Azorín-Molina C, El-Kenawy AM. Drought variability and land degradation in semiarid regions: assessment using remote sensing data and drought Indices (1982–2011). Remote Sensing 7 (4): 4391-4423 (2015)
ResumenWe 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.
Descripción33 Pags.- 1 Tabl.- 16 Figs. Creative Commons Attribution License.
Versión del editorhttp://dx.doi.org/10.3390/rs70404391
URIhttp://hdl.handle.net/10261/116090
DOI10.3390/rs70404391
ISSN2072-4292
E-ISSN2072-4292
Aparece en las colecciones: (EEAD) Artículos
(IPE) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
BegueriaS_RemotSens_2015.pdf2,71 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.