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. Author manuscript; available in PMC: 2014 Jan 23.
Published in final edited form as: Agric For Meteorol. 2011 Dec 15;151(12):1731–1740. doi: 10.1016/j.agrformet.2011.07.007

Figure 5.

Figure 5

Daytime half-hourly measurements (symbols) from the period 2001-2009 of net ecosystem CO2 exchange (NEE), nighttime ecosystem respiration (RECO), gross primary production (GPP), evapotranspiration (ET), ET normalised by the vapour pressure deficit (VPD), and water use efficiency (WUE; NEE/ET) as a function of volumetric soil water content (SWC; 0.05 m depth). Solid and dashed lines represent linear regressions and associated 95% confidence intervals. Note that the values on the x-axis are in descending order.