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Radiation, temperature, and leaf area explain ecosystem carbon fluxes in boreal and temperate European forests
Author(s) -
van Dijk Albert I. J. M.,
Dolman A. J.,
Schulze ErnstDetlef
Publication year - 2005
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2004gb002417
Subject(s) - primary production , environmental science , ecosystem , taiga , atmospheric sciences , temperate rainforest , temperate forest , temperate climate , ecosystem respiration , boreal , boreal ecosystem , forest ecology , terrestrial ecosystem , ecology , biology , physics
We analyzed measurements of net ecosystem exchange of CO 2 (NEE) over 15 European forests (the EuroFlux data set) to investigate which climate and forest characteristics explain temporal and intersite variations in NEE and its components, gross primary production (GPP) and respiration (R). Informed stepwise regression was used to derive a parameter‐efficient, empirical model that was consistent with process knowledge. The resulting model required seven site‐specific parameters to describe flux behavior at different temporal scales as a function of radiation, temperature, and air humidity. The interpretation appeared robust despite method and data uncertainties, although the data set was probably biased toward well‐watered boreal and temperate European forests. Radiation, temperature, and leaf area (through forest assimilation capacity) appear to be the main drivers of the observed temporal and intersite variation in gross primary production, ecosystem respiration, and net ecosystem exchange.