Vegetation dynamics; climate variability; low resolution imagery; geostatistics; time series analysis
Abstract :
[en] Many studies already investigated the impact of climate change and climate variability on vegetation at global and continental scales. Low resolution satellite imagery is one of the main sources of information. In this paper, we describe a strategy to improve the quality of 10-daily time series of Normalized Difference Vegetation Index derived from SPOT-VEGETATION. A specifi c methodology was also defi ned in order to identify optimal test sites for the analysis of climate control on intra-annual dynamic of croplands. Finally two cases studies are presented
to illustrate this research and in particular the non linear relationship between NDVI and meteorological parameters during the growing season.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Horion, Stéphanie
Tychon, Bernard ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Département des sciences et gestion de l'environnement
Cornet, Yves ; Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Télédétection et photogrammétrie
Language :
English
Title :
Climatological characteristics of NDVI time series: challenges and constraints
