Long term NOAA-AVHRR GIMMS-NDVI - rainfall relationships and trends 1981 to 2003 for entire DeSurvey area of interest
Författare
Summary, in English
The areas studied include the Mediterranean basin (Southern Europe and Northern Africa), the Sahel from the Atlantic to the Red Sea, major parts of the drylands of Southern Africa, China and the drylands of South America, i.e. important parts of the desertification prone areas of the world (Cf. fig. 1)
It is concluded that the suggested methodology is a robust and reliable way to assess and monitor desertification on a global, national and regional scale. The results of the applied methodology indicate a strong general relationship between NDVI and rainfall over time. The results of performed trend analysis cannot be used to verify any systematic generic land degradation/desertification trend at the regional-global level in any of the regions studied. On the contrary, a “greening-up” seems to be evident over the past 20 years in several of the regions when interpreting the NDVI as a proxy for biomass cover and seasonal vegetation growth.
This is most obvious in the African Sahel region south of the Sahara.
Publiceringsår
2007
Språk
Engelska
Publikation/Tidskrift/Serie
FP6, DeSurvey IP, Sub-deliverable 1.5.1.17 (1), Deliverables data base
Fulltext
- Available as PDF - 22 MB
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Dokumenttyp
Rapport
Förlag
DeSurvey IP & Department of Physical Geography and Ecosystems Analysis
Ämne
- Physical Geography
Nyckelord
- Remote sensing
- land degradation
- global biomass monitoring
- desertification
Status
Published
Projekt
- FP6, DeSurvey IP 2005-2010, A Surveillance System for Assessing and Monitoring Desertification
Report number
FP6, DeSurvey IP, Sub-deliverable 1.5.1.17 (1)
Forskningsgrupp
- EU FP6 DeSurvey WP 1.5.1: RS & Geomatics-Land condition assessment, Regional trends
ISBN/ISSN/Övrigt
- EU FP6 DeSurvey Project No.: 003950