Terrestrial biosphere models underestimate the mean and inter-annual variability of net CO2 fluxes in semi-arid ecosystems

Natasha MacBean, Indiana University - Bloomington, Geography, Bloomington, IN, United States, Russell L Scott, USDA-ARS, Southwest Watershed Research Center, Tucson, AZ, United States, Joel A Biederman, University of Arizona, Tucson, AZ, United States and David JP Moore, University of Arizona, School of Natural Resources and the Environment, Tucson, AZ, United States