Cart (Loading....) | Create Account
Close category search window
 

Changes in Land Surface Conditions on the Iberian Peninsula (1989 to 2004) Detected by Means of Time Series Analysis from Hypertemporal Remote Sensing Data

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Udelhoven, T. ; Centre de Recherche Public -Gabriel Lippmann, Belvaux ; Stellmes, M.

In the present study long-term variations (1989 to 2004) on the Iberian Peninsula are addressed using the "Mediterranean Extended Daily One Km AVHRR Data Set" (MEDOKADS). The Normalised Difference Vegetation Index (NDVI) was used as proxy for land surface response to precipitation variability and human activities with ecological and social impacts at various temporal scales. Despite large areas in Iberia were found to be progressively vulnerable to recent episodes of droughts and wild fires, changes in biomass productivity are more distinctly related to man induced land-use changes. To decide whether detected changes in surface reflectance are related to improvement or reduction in resource productivity a synoptically view of time-series analysis products derived from monthly NDV'I data, including trend analysis, temporal shifts in the occurrence of the annual green peak, change detection in successive land-cover maps, and characteristics in the stochastic nature of the time-series, was selected. Changes in surface conditions detected at the 1 km scale cannot be understood without reference to physio-geographical and socio-economical data. The explanatory factors for changes in plant biomass productivity regionally differ across the Iberian Peninsula. Driving factors for increasing NDVI values are land abandonment and the negligence of silviculture, as well as modifications in land management schemes and the expansion of irrigation systems. Main explanations for negative trends are the exploitation of irrigation beyond mid-and long-term sustainability, wildfires, the depletion of biomass and vegetation cover by soil erosion, and the expansion of urban agglomerations.

Published in:

Analysis of Multi-temporal Remote Sensing Images, 2007. MultiTemp 2007. International Workshop on the

Date of Conference:

18-20 July 2007

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.