Quantifying reflectance anisotropy of photosynthetically active radiation in grasslands

Journal Article · Mon Nov 30 00:00:00 EST 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/92JD00879· OSTI ID:6249986

Middleton, E M ^[1]

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1. NASA Goddard Space Flight Center, Greenbelt, MD (United States)

This work is part of the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE), an international land-surface-atmosphere experiment aimed at improving the way climate models represent energy, water, heat, and carbon exchanges, and improving the utilization of satellite based remote sensing to monitor such parameters. This paper reports on a study to quantify the reflectance anisotropy of the photosynthetically active radiation (PAR) for grasslands. PAR falls in the wavelength range 0.4 to 0.7[mu]m. The study looks at the variation of PAR with illumination and vegetative canopy conditions. It uses bidirectional reflectance distribution function data, and measures of anisotropy derived from reflectance factor and reflectance fraction data to aid in the analysis. The data used for this analysis came from an intense effort mounted to measure diurnal changes in the anisotropy of surface reflectance from prairie grassland as a function of the vegetative canopy.

• OSTI ID: 6249986
• Journal Information: Journal of Geophysical Research; (United States), Vol. 97:D17; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
RANGELANDS
ANISOTROPY
SPECTRAL REFLECTANCE
VISIBLE RADIATION
ABSORPTION
PLANTS
REFLECTIVITY
REMOTE SENSING
SOLAR RADIATION
ECOSYSTEMS
ELECTROMAGNETIC RADIATION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SORPTION
STELLAR RADIATION
SURFACE PROPERTIES
TERRESTRIAL ECOSYSTEMS
540210* - Environment
Terrestrial- Basic Studies- (1990-)