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Spectroscopic Measurement of Leaf Water StatusA leaf drying experiment was carried out in the laboratory in which simultaneous spectral reflectance in the 350-2450 nm region, and leaf weights, were measured at 10 second intervals over a 40 minute period. As the leaf water weight dropped from approximately 60 to 38%. a nearly-linear rise in reflectance at all wavelengths beyond 1000 nm was observed. A principal components analysis of the time series of spectra in the 2000-2500 nm wavelength region showed that over 99% of the variance in the spectra, that were individually scaled to have a sum equal to that of the mean spectrum and subsequently mean corrected, was in the first component. This result shows that it is feasible to determine leaf water content remotely with an imaging spectrometer independent of the surface irradiance effects caused by topography.
Document ID
20010090350
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Goetz, Alexander F. H. (Colorado Univ. Boulder, CO United States)
Boardman, Joseph W. (Colorado Univ. Boulder, CO United States)
Date Acquired
September 7, 2013
Publication Date
January 20, 1995
Publication Information
Publication: Proceedings GARSS 1995
Volume: 2
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: GARSS 1995
Location: Florence
Country: Italy
Start Date: July 10, 1995
End Date: July 14, 1995
Funding Number(s)
CONTRACT_GRANT: NAS5-31711
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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