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Description

The Leaf Area Index and PAR Determined from the UNL Light Bar Data were collected in 1987, 1988, and 1989. Incoming, reflected, and transmitted photosynthetically active radiation (PAR) was measured with a LI-COR LI-191SA line quantum sensor. Absorbed and intercepted PAR calculated from these measurements. The objectives of this research were to characterize bi-directional reflectance factor distributions, estimate surface albedo, determine the variability of reflected and emitted fluxes in selected spectral wavebands as a function of topography, vegetative community and management practice, determine the influence of plant water status on surface reflectance factors, and determine sun angle affects on radiation fluxes.

Product Summary

Platforms
FIELD INVESTIGATION
Instruments
LICOR QUANTUM SENSOR
Spatial Extent

N: 39.12 S: 38.98 E: -96.47 W: -96.6

Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1987-06-30 to 1989-10-31
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
C2980089121-ORNL_CLOUD
Data State
COMPLETE
Number of Files/Granules
39
Processing Level
3
Published
Updated
Science Keywords
Reflectance ,
Transmittance ,
Photosynthetically Active Radiation

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Blad, B. L., & Walter-Shea, E. A. (1994). LAI & PAR Data: Light Bar - UNL (FIFE) (Version 1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/42 Date Accessed: 2026-05-02

Documents

Publications Citing This Dataset

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Title Year Author Topic
Water and heat resource utilization influence cotton yield through sowing date optimization under varied climate Khan, Hamad, Khan, Nangial, Khan, Zeeshan, Yingchun, Han, Beifang, Yang, Yaping, Lei, Xiaoyu, Zhi, Shiwu, Xiong, Shilong, Shang, Yunzhen, Ma, Yahui, Jiao, Tao, Lin, Li, Yabing Reflectance, Transmittance, Photosynthetically Active Radiation
How can the First ISLSCP Field Experiment contribute to present-day efforts to evaluate water stress in JULESv5. 0? Williams, Karina E., Harper, Anna B., Huntingford, Chris, Mercado, Lina M., Mathison, Camilla T., Falloon, Pete D., Cox, Peter M., Kim, Joon Soil Compaction, Soil Moisture/Water Content, Organic Matter, Soil Color, Soil Horizons/Profile, Soil Structure, Soil Porosity, Atmospheric Pressure Measurements, Incoming Solar Radiation, Longwave Radiation, Reflectance, Solar Radiation, Surface Temperature, Air Temperature, Surface Winds, Precipitation Rate, Soil Temperature, Biomass, Leaf Area Index (LAI), Canopy Characteristics, Biomass Dynamics, Canopy Transmittance, Photosynthetically Active Radiation, Leaf Characteristics, Water Vapor, Photosynthesis, Atmospheric Carbon Dioxide, Respiration Rate, Soil Heat Budget, Soil Temperature, Heat Flux, Net Radiation, Soil Heat Budget, Transmittance, Hydraulic Conductivity, Soil Depth
Modeling of Energy, Water, and CO<SUB>2</SUB> Flux in a Temperate Grassland Ecosystem with SiB2: May-October 1987. Colello, G. D., Grivet, C., Sellers, P. J., Berry, J. A. Soil Heat Budget, Soil Temperature, Atmospheric Carbon Dioxide, Heat Flux, Net Radiation, Solar Radiation, Surface Temperature, Air Temperature, Water Vapor, Surface Winds, Soil Heat Budget, Soil Temperature, Reflectance, Transmittance, Photosynthetically Active Radiation, Soil Moisture/Water Content, Leaf Characteristics, Atmospheric Pressure Measurements, Incoming Solar Radiation, Longwave Radiation, Precipitation Rate, Surface Pressure, Shortwave Radiation, Precipitation Amount, Biomass, Leaf Area Index (LAI), Canopy Characteristics, Biomass Dynamics, Vegetation Species, Vegetation Cover
Monthly Simulation of Surface Layer Fluxes and Soil Properties during FIFE. Bosilovich, Michael G., Sun, Wen-yih Heat Flux, Soil Heat Budget, Soil Moisture/Water Content, Atmospheric Pressure Measurements, Incoming Solar Radiation, Longwave Radiation, Reflectance, Solar Radiation, Surface Temperature, Air Temperature, Surface Winds, Precipitation Rate, Soil Temperature, Soil Heat Budget, Transmittance, Photosynthetically Active Radiation, Vegetation Species, Vegetation Cover
A two-source approach for estimating turbulent fluxes using multiple angle thermal infrared observations Kustas, William P., Norman, John M. Soil Heat Budget, Soil Temperature, Heat Flux, Net Radiation, Solar Radiation, Surface Temperature, Air Temperature, Virtual Temperature, Water Vapor, Surface Winds, Soil Heat Budget, Soil Temperature, Atmospheric Carbon Dioxide, Soil Moisture/Water Content, Precipitation Amount, Soil Moisture/Water Content, Canopy Transmittance, Leaf Area Index (LAI), Reflectance, Transmittance, Photosynthetically Active Radiation, Atmospheric Pressure Measurements, Surface Pressure, Longwave Radiation, Shortwave Radiation, Reflectance, Solar Irradiance, Land Surface Temperature, Leaf Characteristics, Photosynthesis, Vegetation Species, Atmospheric Ozone
Optimal sampling conditions for estimating grassland parameters via reflectance Privette, J.L., Myneni, R.B., Emery, W.J., Hall, F.G. Reflectance, Canopy Characteristics, Reflectance, Surface Temperature, Transmittance, Leaf Characteristics, Photosynthetically Active Radiation, Vegetation Species, Vegetation Cover, Water Vapor, Potential Temperature, Aerosol Optical Depth/Thickness, Atmospheric Ozone, Optical Depth/Thickness
Using remotely sensed data to estimate surface albedo and absorbed photosynthetic active radiation Toll, D.L., Shirey, D.A., Kimes, D.S. Reflectance, Transmittance, Photosynthetically Active Radiation, Albedo, Incoming Solar Radiation, Radiative Flux, Solar Radiation, Water Vapor, Albedo, Land Surface Temperature
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