Fig. 8From: Differential responses of carbon and water vapor fluxes to climate among evergreen needleleaf forests in the USAResponses of net ecosystem CO2 exchange (NEE) and evapotranspiration (ET) to air temperature (T a) and vapor pressure deficit (VPD) at ten forest sites. Daytime (solar radiation >5 W m−2) half-hourly NEE and ET data over the study period were aggregated in ten classes of increasing T a and VPDBack to article page