Linking Flux Network Measurements to Continental Scale Simulations: Ecosystem Carbon Dioxide Exchange Capacity under Non-Water-Stressed Conditions
Owen, Katherine E.
Meyers, TildenNote: Order does not necessarily reflect citation order of authors.
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CitationOwen, Katherine E., John Tenhunen, Markus Reichstein, Quan Wang, Eva Falge, Ralf Geyer, Xiangming Xiao, et al. 2007. Global Change Biology 13(4): 734-760.
AbstractThis 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.
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