Archive for the ‘ecosystem model’ Category
Large-scale vegetation-rainfall correlations in Africa
Weather and climatic variability affect vegetation on continental scales. Intuitively, healthy vegetation is greener. A quantitative index of “greenness” called Normalised Difference Vegetation Index (NDVI) was developed by NASA.В The index takes values between 0 and 1. NDVI is related to the fraction of photosynthetically active radiation absorbed by the vegetation canopy. It is a [...]
May 12, 2010
Tags: Africa, Drought, NDVI Posted in: Climate, ecosystem model 
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Mapping Biomes
Recently (2008) the European Space Agency produced GlobCover (ESA GlobCover Project, led by MEDIAS-France), the highest resolution (300m) global land cover map to date. GlobCover uses 21 primary land cover classes and many more sub-classes. Land cover classification (LCC) schemes divide the earth into biomes. Biomes are the simplest way to classify vegetation which can [...]
November 20, 2009
Tags: ecosystem model, R Posted in: Agriculture, Land Cover Maps, ecosystem model No Comments
