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Photosynthesis and stomatal conductance related to reflectance on the canopy scaleField measurements of carbon dioxide and water vapor fluxes were analyzed in conjunction with reflectances obtained from a helicopter-mounted Modular Multiband Radiometer at a grassland study site during the First International Satellite Land Surface Climatology Project Field Experiment. These measurements are representative of the canopy scale and were made over a range of meteorological and soil moisture conditions during different stages in the annual life cycle of the prairie vegetation, and thus provide a good basis for investigating hpotheses/relationships potentially useful in remote sensing applications. We tested the hypothesis (Sellers, 1987) that the simple ratio vegetation index should be near-linearly related to the derivatives of the unstressed canopy stomatal conductance and the unstressed canopy photosynthesis with respect to photosynthetically active radiation. Even though there is some scatter in our data, the results seem to support this hypothesis.
Document ID
19930048936
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Verma, S. B.
(Nebraska Univ. Lincoln, United States)
Sellers, P. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Walthall, C. L.
(Maryland Univ. College Park, United States)
Hall, F. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kim, J.
(Nebraska Univ. Lincoln, United States)
Goetz, S. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Remote Sensing of Environment
Volume: 44
Issue: 1
ISSN: 0034-4257
Subject Category
Earth Resources And Remote Sensing
Accession Number
93A32933
Funding Number(s)
CONTRACT_GRANT: NAG5-892
CONTRACT_GRANT: NAG5-907
CONTRACT_GRANT: NCC5-26
CONTRACT_GRANT: NSF ATM-85-19026
CONTRACT_GRANT: NAG5-890
Distribution Limits
Public
Copyright
Other

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