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Relationship of Thematic Mapper simulator data to leaf area index of temperate coniferous forestsRegional relationships between remote sensing data and the leaf area index (LAI) of coniferous forests were analyzed using data acquired by an Airborne Thematic Mapper. Eighteen coniferous forest stands with a range of projected leaf area index of 0.6-16.1 were sampled from an environmental gradient in moisture and temperature across west-central Oregon. Spectral radiance measurements to account for atmospheric effects were acquired above the canopies from a radiometer mounted on a helicopter. A strong positive relationship was observed between LAI of closed canopy forest stands and the ratio of near-infrared and red spectral bands. A linear regression based on LAI explained 83 percent of the variation in the ratio of the atmospherically corrected bands. A log-linear equation fit the asymptotic characteristic of the relationship better, explaining 91 percent of the variance. The positive relationship is explained by a strong asymptotic inverse relationship between LAI and red radiation and a relatively flat response between LAI and near-infrared radiation.
Document ID
19870065743
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Peterson, David L.
(NASA Ames Research Center Moffett Field, CA, United States)
Spanner, Michael A.
(NASA Ames Research Center; TGS Technology, Inc. Moffett Field, CA, United States)
Running, Steven W.
(Montana, University Missoula, United States)
Teuber, Kurt B.
(USDA, Southern Forest Experimental Station, Starkville MS, United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1987
Publication Information
Publication: Remote Sensing of Environment
Volume: 22
ISSN: 0034-4257
Subject Category
Earth Resources And Remote Sensing
Accession Number
87A53017
Funding Number(s)
CONTRACT_GRANT: NCA2-OR-475-301
Distribution Limits
Public
Copyright
Other

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