Assessment and monitoring of land condition in the Iberian Peninsula, 1989–2000

Barrio, Gabriel del; Puigdefábregas, Juan; Sanjuán, María Eugenia González; Stellmes, Marion; Ruiz, Alberto

doi:10.1016/j.rse.2010.03.009

Cited by 81 publications

(72 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In these regions the vegetation behavior is very complex and it becomes difficult to disentangle the effect of droughts on land degradation from other natural factors or human activities (Vicente Serrano et al, 2015). Results from previous studies (Hill et al, 2008;del Barrio et al, 2010) do not support the idea of reduced biological biodiversity and widespread desertification in Mediterranean basin, including some well-established desertification status achieved by southern and eastern parts of the Iberian Peninsula (Brandt and Thornes, 1996).…”

Section: Discussionmentioning

confidence: 97%

“…However in some Mediterranean regions positive trends in vegetation activity were found spread throughout almost everywhere (del Barrio et al, 2010). However, when the entire Mediterranean basin is considered, spots of negative trends were detected in degraded lands and positive trends in regions with land in good conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Located in western Mediterranean, the Iberian Peninsula has been equally affected by intense drought events since the 1980s (Garcia-Herrera et al, 2007;Vicente-Serrano et al, 2011;Gouveia et al, 2012). However, recent works show that the land throughout Iberia is in relatively good conditions, with isolated spots of land degradation that could be connected with land use changes, particularly the use of intensive agricultural techniques (del Barrio et al, 2010). Moreover Hill and co-authors (2008), using remote sensing information between 1989 and 2004, also identified over Iberia a widespread vegetation increase with local areas of land degradation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Land degradation trend assessment over Iberia during 1982-2012

Gouveia

Páscoa

Russo

et al. 2016

CIG

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Land degradation trend assessment over Iberia during 1982-2012

Gouveia

Páscoa

Russo

et al. 2016

CIG

View full text Add to dashboard Cite

show abstract

“…Moderate resolution multispectral time series (AVHRR, MODIS, VGT, MERIS) are generally exploited to assess vegetation response to land degradation at broad scale [16,[21][22][23][24][25][26]. Normalized Difference Vegetation Index (NDVI) obtained from these data has also proven to be reliable for identifying vegetation stress in complex Mediterranean landscapes [14,[27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…Irrespective of the trigger causes, the primary sign of degradation is reduced biological productivity (e.g., [18,21,23,56]). Consequently, degradation in vegetated lands should enhance alterations in vegetation properties, such as health, density, etc.…”

Section: Introductionmentioning

confidence: 99%

Early Identification of Land Degradation Hotspots in Complex Bio-Geographic Regions

et al. 2015

View full text Add to dashboard Cite

Abstract:The development of low-cost and relatively simple tools to identify emerging land degradation across complex regions is fundamental to plan monitoring and intervention strategies. We propose a procedure that integrates multi-spectral satellite observations and air temperature data to detect areas where the current status of local vegetation and climate shows evident departures from the mean conditions of the investigated region. Our procedure was tested in Basilicata (Italy), which is a typical bio-geographic example of vulnerable Mediterranean landscape. We grouped Landsat TM/ETM+ NDVI and air temperature (T) data by vegetation cover type to estimate the statistical distributions of the departures of NDVI and T from the respective land cover class means. The pixels characterized by contextual left tail NDVI values and right tail T values that persisted in time (2002)(2003)(2004)(2005)(2006) were classified as critical to land degradation. According to our results, most of the critical areas (88.6%) corresponded to forests affected by erosion and to riparian buffers that are shaped by fragmentation, as confirmed by aerial and in-situ surveys. Our procedure enables cost-effective screenings of complex areas able to identify raising hotspots that require urgent and deeper investigations.

show abstract

Sensitivity of reference evapotranspiration to changes in meteorological parameters in Spain (1961–2011)

Vicente‐Serrano

Azorín-Molina

Sánchez-Lorenzo

et al. 2014

Water Resources Research

101

View full text Add to dashboard Cite

This study analyzes changes in monthly reference evapotranspiration (ETo) by use of the Penman-Monteith equation and data from 46 meteorological stations in Spain from 1961 to 2011. Over the 51 year study period, there were trends for increasing average ETo during all months and annually at most of the individual meteorological stations. Sensitivity analysis of ETo to changes in meteorological variables was conducted by increasing and decreasing an individual climate variable holding the other variables constant. Sensitivity analysis indicated that relative humidity, wind speed, and maximum temperature had stronger effects on ETo than sunshine duration and minimum temperature. This suggests that aerodynamic component has more importance than radiative component to determine the atmospheric evaporative demand in Spain. The analysis showed a dominant latitudinal spatial gradient in the ETo relative changes across the 46 meteorological observatories, mainly controlled by the increasing available solar energy southward. In addition, the role of different meteorological variables on ETo is influenced by the average climatology at each observatory. ETo trends are mainly explained by the decrease in relative humidity and the increase in maximum temperature since the 1960s, particularly during the summer months. The physical mechanisms that explain ETo sensitivity to the different physical variables and current ETo trends are discussed in detail.

show abstract

Assessment and monitoring of land condition in the Iberian Peninsula, 1989–2000

Cited by 81 publications

References 54 publications

Land degradation trend assessment over Iberia during 1982-2012

Land degradation trend assessment over Iberia during 1982-2012

Early Identification of Land Degradation Hotspots in Complex Bio-Geographic Regions

Sensitivity of reference evapotranspiration to changes in meteorological parameters in Spain (1961–2011)

Contact Info

Product

Resources

About