Are vegetation indices useful in the Arctic?

Rees, W.G., Golubeva, E.I. and Williams, M. (1998) Are vegetation indices useful in the Arctic? In: UNSPECIFIED Cambridge University Press, pp. 333-336. ISSN 0032-2474 (print), 1475-3057 (electronic)

Abstract

This paper describes a preliminary investigation of the extent to which the normalised difference vegetation index (NDVI), derived from satellite optical imagery, can indicate the extent of damage to upland tundra (fruticose lichen and dwarf shrub) vegetation. We combine the results of a previously reported classification of Landsat multispectral scanner imagery from Kol'skiy Poluostrov, Russia, with field measurements of the biomass and spectral reflectance of tundra vegetation. The results show that the NDVI is not strongly influenced by biomass, but that differences in species composition and ground cover are significant. Other workers have concluded that vegetation indices are not useful for boreal forests. It is therefore suggested that the use of the NDVI by itself as an indicator of the state of disturbed vegetation in Arctic regions is not recommended.

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