NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Seasonal variation in the structure of red reflectance of leaves from yellow poplar, red oak, and red mapleThe light scattered from leaves was measured as a function of view angle in the principal plane for yellow poplar, red oak, and red maple. The source was a parallel-polarized helium-neon laser. Yellow poplar leaves had the highest reflectance of the three species, which may have been due to its shorter palisade cells and more extensive spongy mesophyll. Prior to senescence, there was a significant decrease, but not total extinction, in the reflectance of the beam incident at 60 deg from nadir on the adaxial side of the leaves of all three species. Low-temperature SEM observations showed differences in the surface wax patterns among the three species but did not indicate a cause of the reflectance changes other than possibly the accumulation and aging of the wax.
Document ID
19930042954
Document Type
Reprint (Version printed in journal)
Authors
Brakke, Thomas W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wergin, William P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Erbe, Eric F. (USDA, Electron Microscopy Lab. Beltsville, MD, United States)
Harnden, Joann M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Remote Sensing of Environment
Volume: 43
Issue: 2
ISSN: 0034-4257
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Distribution Limits
Public
Copyright
Other