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ACCP

Accelerated Canopy Chemistry Program

The Accelerated Canopy Chemistry Program (ACCP) was an investigation to determine the theoretical and empirical basis for remote sensing of nitrogen and lignin concentrations in vegetation canopies of different ecosystems. 

The ACCP data consist of images from the Airborne Visible InfraRed Imaging Spectrometer–Classic (AVIRIS-C), laboratory chemical analysis of field samples, laboratory spectra and chemical analyses from several mini-canopy experiments, and canopy modeling data.

Study Dates1992-06-02 - 1993-05-27
Region

Harvard Forest, MA

Blackhawk Island, WI

Howland, ME

Gainesville, FL

Jasper Ridge, CA

Dunnigan, CA

Pleasant Grove, CA

Spatial Bounds

N: 45°N 

S: 30°N 

W: 122°W 

E: 69°W

Data Types

Leaf Level Chemistry

Seedling Canopy Level Chemistry

Plot Level Chemistry

Leaf Spectra

Seedling Canopy Spectra

Plot Spectra

Seedling Architecture

Scientific Topics

Canopy Characteristics

Climate Indicators

Nitrogen

Vegetation

PlatformsInstruments
Earth Resources-2 (ER-2) AircraftAirborne Visible/Infrared Imaging Spectrometer - Classic (AVIRIS-C)
Field Site

LI-COR Plant Canopy Analyzer

Spectrophotometer

Spectron Engineering-590 Spectroradiometer (SE-590)

Generic Chemistry-Related Sensors

Stratospheric InfraRed Interferometer Spectrometer (SIRIS)

In the autumn of 1991, the High Resolution Imaging Spectrometer (HIRIS) was de-selected for NASA's Earth Observing System (EOS) program. However, the EOS Investigator Working Group (IWG) had determined that the potential for high spectral resolution remote sensing to estimate nitrogen and lignin concentrations in vegetative canopies, and from these, rates of ecosystem function, was not addressed by other EOS instruments. So, the HIRIS Science Team used its remaining funding to clarify the scientific validity of this application, forming the Accelerated Canopy Chemistry Program (ACCP).

The following resources provide additional information about the ACCP campaign.