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dc.contributor.author
Alcaraz Segura, Domingo
dc.contributor.author
Liras, Elisa
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Tabik, Siham
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Paruelo, José
dc.contributor.author
Cabello, Javier
dc.date.available
2020-02-03T18:00:10Z
dc.date.issued
2010-02
dc.identifier.citation
Alcaraz Segura, Domingo; Liras, Elisa; Tabik, Siham; Paruelo, José; Cabello, Javier; Evaluating the consistency of the 1982-1999 NDVI trends in the Iberian Peninsula across four time-series derived from the AVHRR sensor: LTDR, GIMMS, FASIR, and PAL-II; Molecular Diversity Preservation International; Sensors; 10; 2; 2-2010; 1291-1314
dc.identifier.issn
1424-8220
dc.identifier.uri
http://hdl.handle.net/11336/96547
dc.description.abstract
Successive efforts have processed the Advanced Very High Resolution Radiometer (AVHRR) sensor archive to produce Normalized Difference Vegetation Index (NDVI) datasets (i.e., PAL, FASIR, GIMMS, and LTDR) under different corrections and processing schemes. Since NDVI datasets are used to evaluate carbon gains, differences among them may affect nations' carbon budgets in meeting international targets (such as the Kyoto Protocol). This study addresses the consistency across AVHRR NDVI datasets in the Iberian Peninsula (Spain and Portugal) by evaluating whether their 1982-1999 NDVI trends show similar spatial patterns. Significant trends were calculated with the seasonal Mann- Kendall trend test and their spatial consistency with partial Mantel tests. Over 23% of the Peninsula (N, E, and central mountain ranges) showed positive and significant NDVI trends across the four datasets and an additional 18% across three datasets. In 20% of Iberia (SW quadrant), the four datasets exhibited an absence of significant trends and an additional 22% across three datasets. Significant NDVI decreases were scarce (croplands in the Guadalquivir and Segura basins, La Mancha plains, and Valencia). Spatial consistency of significant trends across at least three datasets was observed in 83% of the Peninsula, but it decreased to 47% when comparing across the four datasets. FASIR, PAL, and LTDR were the most spatially similar datasets, while GIMMS was the most different. The different performance of each AVHRR dataset to detect significant NDVI trends (e.g., LTDR detected greater significant trends (both positive and negative) and in 32% more pixels than GIMMS) has great implications to evaluate carbon budgets. The lack of spatial consistency across NDVI datasets derived from the same AVHRR sensor archive, makes it advisable to evaluate carbon gains trends using several satellite datasets and, whether possible, independent/additional data sources to contrast.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Molecular Diversity Preservation International
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CARBON GAINS
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IBERIAN PENINSULA
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PARTIAL MANTEL TEST
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PORTUGAL
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SEASONAL MANN-KENDALL TREND TEST
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SPAIN
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SPATIAL STATISTICS
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TEMPORAL TRENDS ANALYSIS
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Otras Ciencias Agrícolas
dc.subject.classification
Otras Ciencias Agrícolas
dc.subject.classification
CIENCIAS AGRÍCOLAS
dc.title
Evaluating the consistency of the 1982-1999 NDVI trends in the Iberian Peninsula across four time-series derived from the AVHRR sensor: LTDR, GIMMS, FASIR, and PAL-II
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-03-08T20:20:00Z
dc.journal.volume
10
dc.journal.number
2
dc.journal.pagination
1291-1314
dc.journal.pais
Suiza
dc.description.fil
Fil: Alcaraz Segura, Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Almería; España
dc.description.fil
Fil: Liras, Elisa. Universidad de Almería; España
dc.description.fil
Fil: Tabik, Siham. Universidad de Málaga; España
dc.description.fil
Fil: Paruelo, José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
dc.description.fil
Fil: Cabello, Javier. Universidad de Almería; España
dc.journal.title
Sensors
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3390/s100201291
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/1424-8220/10/2/1291
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