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Estimation of leaf CO2 exchange rates using a SPOT image

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With increasing atmospheric carbon dioxide (CO2) concentrations, researchers are looking for alternative methods to quantify the terrestrial carbon sink. Although the link between CO2 exchange and spectral reflectance has been established with net flux towers, limited research has been conducted using a leaf chamber. In an effort to determine the applications of satellite remote sensing in the estimation of carbon exchange measured with a leaf chamber, the primary objective of this study is to evaluate several broadband vegetation indices derived from a Satellite pour l'Observation de la Terre (SPOT) image in the prediction of leaf CO2 exchange rates in a northern mixed-grass prairie ecosystem. Biophysical measurements and CO2 exchange rates were collected from 24 sites located in and around Grasslands National Park, Saskatchewan, Canada. Linear regression showed that the Simple Ratio Vegetation Index explained 24% of the variance observed in the CO2 exchange rates.
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Document Type: Research Article

Affiliations: 1: Department of Geography and Planning, University of Saskatchewan, Saskatoon, Saskatchewan, Canada 2: Ministry of Transportation, Burnaby, BC, Canada

Publication date: 2011-01-01

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