Spectral indices for estimating photosynthetic pigment concentrations: A test using senescent tree leaves
作者:
G. A. Blackburn,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1998)
卷期:
Volume 19,
issue 4
页码: 657-675
ISSN:0143-1161
年代: 1998
DOI:10.1080/014311698215919
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The possibility of estimating the concentration of individual photosynthetic pigments within vegetation from reflectance spectra offers great promise for the use of remote sensing to assess physiological status, species type and productivity. This study evaluates a number of spectral indices for estimating pigment concentrations at the leaf scale, using samples from deciduous trees at various stages of senescence. Two new indices (PSSR and PSND) are developed which have advantages over previous techniques. The optimal individual wavebands for pigment estimation are identified empirically as 680nm for chlorophyll a, 635nm for chlorophyll b and 470nm for the carotenoids. These wavebands are justified theoretically and are shown to improve the performance of many of the spectral indices tested. Strong predictive models are demonstrated for chlorophyll a and b, but not for the carotenoids and the paper explores the reasons for this.
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