Investigations on the biochemical components NIR absorption features in AVIRIS and laboratory reflectance spectra of vegetation
The reflectance spectrum of green vegetation is mainly determined by the leaf content in chlorophyll and water. However, in the near infrared, additional absorption features are present which are attributed to other components such as lignin, cellulose and proteins. Of particular interest is an absorption centred around 1.7 microns, placed in an atmospheric window and therefore accessible to remote sensing, in particular to imaging spectrometry. This paper presents a procedure, based on a simple radiative transfer model, which evaluates the amplitude of this residual absorption. The technique has been applied to several AVIRIS scenes acquired during the MAC-Europe campaign to produce residual absorption amplitude maps. Comparing with maps of chlorophyll indices and water indices, it is clear that the residual absorption contains different information which is probably related to the biochemical content. Several investigations are pursued to document the link between this new parameter and the plant/canopy characteristics.
Bibliographic Reference: Paper presented: IGARSS '94, Pasadena (US), August 8-12, 1994
Availability: Available from (1) as Paper EN 38440 ORA
Record Number: 199411067 / Last updated on: 1994-11-28
Original language: en
Available languages: en