Energy and water exchanges modulated by soil–plant nitrogen cycling in a temperate Pacific Northwest conifer forest

Nitrogen controls on the seasonal and inter-annual variations in evapotranspiration in a temperate Pacific Northwest Douglas-fir forest in British Columbia, Canada, were studied using a coupled carbon and nitrogen (C&N) model developed by incorporating plant–soil nitrogen cycling algorithms in the Carbon-Canadian Land Surface Scheme (default C-CLASS). In the coupled C&N-CLASS, the maximum carboxylation rate of Rubisco (Vcmax) is determined …