Linking Flux Network Measurements to Continental Scale Simulations: Ecosystem Carbon Dioxide Exchange Capacity under Non-Water-Stressed Conditions

This paper examines long-term eddy covariance data from 18 European and 17 North American and Asian forest, wetland, tundra, grassland, and cropland sites under non-water-stressed conditions with an empirical rectangular hyperbolic light response model and a single layer two light-class carboxylase-...

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Bibliographic Details
Published in:Global Change Biology
Main Authors: Geyer, Ralf, Wang, Quan, Tenhunen, John, Falge, Eva, Vogel, Chris, Heinesch, Bernard, Gruenwald, Thomas, Hadley, Julian, Aurela, Mika, Saigusa, Nobuko, Owen, Katherine E., Pilegaard, Kim, Verma, Shashi, Vesala, Timo, Reichstein, Markus, Arain, Altaf, Ammann, Christof, Moureaux, Christine, Aubinet, Marc, Xiao, Xiangming, Chojnicki, Bogdan, Bernhofer, Christian, Moors, Eddy, Stoy, Paul, Knohl, Alexander, Hollinger, David, Granier, Andre, Kutsch, Werner, Lohila, Annalea, Meyers, Tilden
Format: Article in Journal/Newspaper
Language:English
Published: Blackwell Science 2007
Subjects:
grassland
eddy covariance
forest
crops
net ecosystem exchange
carbon dioxide exchange
gross primary production
model inversion
wetland
up-scaling
Tundra
Online Access:http://nrs.harvard.edu/urn-3:HUL.InstRepos:2757766
https://doi.org/10.1111/j.1365-2486.2007.01326.x
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Summary:This paper examines long-term eddy covariance data from 18 European and 17 North American and Asian forest, wetland, tundra, grassland, and cropland sites under non-water-stressed conditions with an empirical rectangular hyperbolic light response model and a single layer two light-class carboxylase-based model. Relationships according to ecosystem functional type are demonstrated between empirical and physiological parameters, suggesting linkages between easily estimated parameters and those with greater potential for process interpretation. Relatively sparse documentation of leaf area index dynamics at flux tower sites is found to be a major difficulty in model inversion and flux interpretation. Therefore, a simplification of the physiological model is carried out for a subset of European network sites with extensive ancillary data. The results from these selected sites are used to derive a new parameter and means for comparing empirical and physiologically based methods across all sites, regardless of ancillary data. The results from the European analysis are then compared with results from the other Northern Hemisphere sites and similar relationships for the simplified process-based parameter were found to hold for European, North American, and Asian temperate and boreal climate zones. This parameter is useful for bridging between flux network observations and continental scale spatial simulations of vegetation/atmosphere carbon dioxide exchange. Other Research Unit Version of Record

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