Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.97 MB bytes)

Title: Site-level evaluation of satellite-based global terrestrial gross primary production and net primary production monitoring.

Author: Turner, David P.; Ritts, William D.; Cohen, Warren B.; Maeirsperger, Thomas K.; Gower, Stith T.; Kirschbaum, Al A.; Runnings, Steve W.; Zhaos, Maosheng; Wofsy, Steven C.; Dunn, Allison L.; Law, Beverly E.; Campbell, John L.; Oechel, Walter C.; Kwon, Hyo Jung; Meyers, Tilden P.; Small, Eric E.; Kurc, Shirley A.; Gamon, John A.;

Date: 2005

Source: Global Change Biology. 11: 666-684

Publication Series: Miscellaneous Publication

Description: Operational monitoring of global terrestrial gross primary production (GPP) and net primary production (NPP) is now underway using imagery from the satellite-borne Moderate Resolution Imaging Spectroradiometer (MODIS) sensor. Evaluation of MODIS GPP and NPP products will require site-level studies across a range of biomes, with close attention to numerous scaling issues that must be addressed to link ground measurements to the satellite-based carbon flux estimates. Here, we report results of a study aimed at evaluating MODIS NPPIGPP products at six sites varying widely in climate, land use, and vegetation physiognomy. Comparisons were made for twenty-five 1 km2 cells at each site, with 8-day averages for GPP and an annual value for NPP. The validation data layers were made with a combination of ground measurements, relatively high resolution satellite data (Landsat Enhanced Thematic Mapper - Plus at 30m resolution), and process-based modeling. There was strong seasonality in the MODIS GPP at all sites, and mean NPP ranged from 80g Cm-2 yr-1 at an arctic tundra site to 550g Cm-2yr-1 at a temperate deciduous forest site. There was not a consistent over- or underprediction of NPP across sites relative to the validation estimates. The closest agreements in NPP and GPP were at the temperate deciduous forest, arctic tundra, and boreal forest sites. There was moderate underestimation in the MODIS products at the agricultural field site, and strong overestimation at the desert grassland and at the dry coniferous forest sites. Analyses of specific inputs to the MODIS NPP/GPP algorithm - notably the fraction of photosynthetically active radiation absorbed by the vegetation canopy, the maximum light use efficiency (LUE), and the climate data - revealed the causes of the over- and underestimates. Suggestions for algorithm improvement include selectively altering values for maximum LUE (based on observations at eddy covariance flux towers) and parameters regulating autotrophic respiration.

Keywords: carbon, FPAR, global, gross primary production, light use efficency, MODIS, net primary production, satellite remote sensing, scaling, validation

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Turner, David P.; Ritts, William D.; Cohen, Warren B.; Maeirsperger, Thomas K.; Gower, Stith T.; Kirschbaum, Al A.; Runnings, Steve W.; Zhaos, Maosheng; Wofsy, Steven C.; Dunn, Allison L.; Law, Beverly E.; Campbell, John L.; Oechel, Walter C.; Kwon, Hyo Jung; Meyers, Tilden P.; Small, Eric E.; Kurc, Shirley A.; Gamon, John A. 2005. Site-level evaluation of satellite-based global terrestrial gross primary production and net primary production monitoring. Global Change Biology. 11: 666-684

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.