Fig. 2From: Differential responses of carbon and water vapor fluxes to climate among evergreen needleleaf forests in the USASeasonal changes of net ecosystem CO2 exchange (NEE), gross primary production (GPP), and evapotranspiration (ET) at ten forest sites. The 8-day average values over the study period from a single site were averaged into a single composite year to produce mean 8-day time seriesBack to article page