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Functional patterns in an annual grassland during an AVIRIS overflightThis study relates Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) imagery to ground measurements of vegetation distribution, physiology, and productivity at Stanford University's Jasper Ridge Biological Preserve. Primary efforts focused on a 9-ha region of annual grassland where we completed a detailed ground-based study in conjunction with a 15 May 1991 AVIRIS overflight. Spectral mixture analysis and the normalized difference vegetation index (NDVI) calculated from AVIRIS data were used to evaluate spatial patterns of vegetation type, productivity, and potential physiological activity. Concurrent ground sampling revealed a high degree of correlation between NDVI and estimates of canopy chemistry, structure, productivity, and CO2 flux, supporting the use of imaging spectrometry to estimate spatial and temporal trends in vegetation physiology and productivity in this relatively simple grassland ecosystem. Geostatistical analyses of both ground and AVIRIS data supported the conclusion that the AVIRIS pixel size was suitable for describing the influence of major landscape features in this grassland and that spatial detail would be lost at slightly larger pixel sizes typical of other imaging spectrometers.
Document ID
19930056262
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gamon, John A.
(California State Univ. Los Angeles, United States)
Field, Christopher B.
(Carnegie Institution of Washington Stanford, CA, United States)
Roberts, Dar A.
(Washington Univ. Seattle, United States)
Ustin, Susan L.
(California Univ. Davis, United States)
Valentini, Riccardo
(Tuscia Univ. Viterbo, Italy)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: Remote Sensing of Environment
Volume: 44
Issue: 3-Feb
ISSN: 0034-4257
Subject Category
Earth Resources And Remote Sensing
Accession Number
93A40259
Funding Number(s)
CONTRACT_GRANT: NAGW-1319
CONTRACT_GRANT: NAS5-3076
CONTRACT_GRANT: NAGW-2652
CONTRACT_GRANT: NAS5-3174
CONTRACT_GRANT: NAS5-31359
Distribution Limits
Public
Copyright
Other

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