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Record Details

Record 30 of 9455
Remote sensing of vegetation canopy photosynthetic and stomatal conductance efficiencies
External Online Source: doi:10.1016/0034-4257(92)90103-Q
Author and Affiliation:
Myneni, R. B.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Ganapol, B. D.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Asrar, G.(NASA Washington, United States)
Abstract: The problem of remote sensing the canopy photosynthetic and stomatal conductance efficiencies is investigated with the aid of one- and three-dimensional radiative transfer methods coupled to a semi-empirical mechanistic model of leaf photosynthesis and stomatal conductance. Desertlike vegetation is modeled as clumps of leaves randomly distributed on a bright dry soil with partial ground cover. Normalized difference vegetation index (NDVI), canopy photosynthetic (Ep), and stomatal efficiencies (Es) are calculated for various geometrical, optical, and illumination conditions. The contribution of various radiative fluxes to estimates of Ep is evaluated and the magnitude of errors in bulk canopy formulation of problem parameters are quantified. The nature and sensitivity of the relationship between Ep and Es to NDVI is investigated, and an algorithm is proposed for use in operational remote sensing.
Publication Date: Dec 01, 1992
Document ID:
19930042967
(Acquired Dec 28, 1995)
Accession Number: 93A26964
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: Remote Sensing of Environment (ISSN 0034-4257); 42; 3; p. 217-238.
Publisher Information: United States
Contract/Grant/Task Num: NAS5-30442
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
NASA; Washington, DC, United States
Description: 22p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CANOPIES (VEGETATION); PHOTOSYNTHESIS; RADIATIVE TRANSFER; REMOTE SENSING; TRANSPIRATION; VEGETATIVE INDEX; BOUNDARY CONDITIONS; PARAMETERIZATION
Imprint And Other Notes: Remote Sensing of Environment vol. 42, no. 3 p. 217-238. Dec. 1992
Availability Source: Other Sources
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