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Novel approach for computing photosynthetically active radiation for productivity modeling using remotely sensed images in the Great Plains, United States

Journal of Applied Remote Sensing

By:
, , , ,
DOI: 10.1117/1.JRS.6.063522

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Abstract

Gross primary production (GPP) is a key indicator of ecosystem performance, and helps in many decision-making processes related to environment. We used the Eddy covariancelight use efficiency (EC-LUE) model for estimating GPP in the Great Plains, United States in order to evaluate the performance of this model. We developed a novel algorithm for computing the photosynthetically active radiation (PAR) based on net radiation. A strong correlation (R2=0.94,N=24) was found between daily PAR and Landsat-based mid-day instantaneous net radiation. Though the Moderate Resolution Spectroradiometer (MODIS) based instantaneous net radiation was in better agreement (R2=0.98,N=24) with the daily measured PAR, there was no statistical significant difference between Landsat based PAR and MODIS based PAR. The EC-LUE model validation also confirms the need to consider biological attributes (C3 versus C4 plants) for potential light use efficiency. A universal potential light use efficiency is unable to capture the spatial variation of GPP. It is necessary to use C3 versus C4 based land use/land cover map for using EC-LUE model for estimating spatiotemporal distribution of GPP.

Geospatial Extents

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Novel approach for computing photosynthetically active radiation for productivity modeling using remotely sensed images in the Great Plains, United States
Series title:
Journal of Applied Remote Sensing
DOI:
10.1117/1.JRS.6.063522
Volume
6
Issue:
1
Year Published:
2012
Language:
English
Publisher:
SPIE
Publisher location:
Bellingham, WA
Contributing office(s):
Earth Resources Observation and Science (EROS) Center
Description:
063522
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Country:
United States