Relationship between satellite-derived vegetation indices and aircraft-based CO2 measurements
- Canada Centre for Remote Sensing, Ottawa (Canada) McGill Univ., Montreal (Canada) Agriculture Canada, Centre for Land and Biological Resources Research, Ottawa (Canada) National Research Council of Canada, Inst. for Aerospace Research, Ottawa (Canada)
The objective of this study was to analyze the relationship between satellite-derived vegetation indices and CO2 uptake, as an initial step in exploring the possibility of using a satellite-derived vegetation index as a measure of net photosynthesis. The study area included the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE) site located on the Konza prairie and adjacent area as well as a transect between Manhattan and Salina. One third of the transect exhibited vegetation and terrain characteristics similar to those on the FIFE site, whereas cultivated land predominated in the remaining portion of the 75-km-long flight line. In June, July, August, and October 1987, several CO2 data sets were obtained using the National Research Council of Canada's Twin Otter research aircraft. The normalized difference vegetation index (NDVI) and the simple ratio (SR) were computed from NOAA AVHRR data acquired as part of FIFE. Aircraft and satellite data were processed to obtain spatially coincident and locally representative flux values. Results show a linear relationship between NDVI and CO2 uptake during a single day; however, a nonlinear relationship emerged when all data sets were combined. The data from FIFE and the regional transect were consistent for one date but differed for other periods. Overall, about 60 percent of total variability in CO2 flux was accounted for by the NDVI and 74 percent by the SR. 14 refs.
- OSTI ID:
- 6295449
- Journal Information:
- Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 97:D17; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radiation fluxes at the FIFE site. Final report, 1 January 1991-31 July 1992
Aircraft- and tower-based fluxes of carbon dioxide, latent, and sensible heat
Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AERIAL MONITORING
AERIAL SURVEYING
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
ECOLOGICAL CONCENTRATION
EVALUATION
FLUIDS
GASES
MONITORING
OXIDES
OXYGEN COMPOUNDS
PLANTS
QUANTITATIVE CHEMICAL ANALYSIS
RADIOMETRIC ANALYSIS
REMOTE SENSING
VAPORS
WATER VAPOR