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gcb12164-sup-0001-FigS1.epsimage/eps131K

Figure S1. Box and Whisker plots showing the mean annual response of (a) WUE, (b) NPP and (c) transpiration (E) to CO2 enhancement at Duke, between 1996 and 2007, for observations and 11 models. The ends of the boxes show the lower (25th) and upper (75 th) quartiles. The horizontal whiskers show the full range of the data. The lines in the boxes are the medians and stars are the means.

gcb12164-sup-0002-FigS2.epsimage/eps131K

Figure S2. Box and Whisker plots showing the mean annual response of (a) WUE, (b) NPP and (c) transpiration (E) to CO2 enhancement at Oak Ridge, for the years 1999, 2004, 2007 and 2008, for observations and 11 models. The ends of the boxes show the lower (25th) and upper (75 th) quartiles. The horizontal whiskers show the full range of the data. The lines in the boxes are the medians and stars are the means.

gcb12164-sup-0003-FigS3.epsimage/eps1575K

Figure S3. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 1998 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0004-FigS4.epsimage/eps1586K

Figure S4. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 1999 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0005-FigS5.epsimage/eps1495K

Figure S5. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2000 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0006-FigS6.epsimage/eps1573K

Figure S6. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2001 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0007-FigS7.epsimage/eps1466K

Figure S7. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2003 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0008-FigS8.epsimage/eps1483K

Figure S8. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2004 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0009-FigS9.epsimage/eps1471K

Figure S9. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2005 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0010-FigS10.epsimage/eps1569K

Figure S10. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2006 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0011-FigS11.epsimage/eps1471K

Figure S11. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2007 at the Duke FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0012-FigS12.epsimage/eps974K

Figure S12 Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 1998 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0013-FigS13.epsimage/eps977K

Figure S13. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 1999 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0014-FigS14.epsimage/eps993K

Figure S14. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2000 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0015-FigS15.epsimage/eps961K

Figure S15. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2001 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0016-FigS16.epsimage/eps972K

Figure S16. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2003 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0017-FigS17.epsimage/eps930K

Figure S17. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2004 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0018-FigS18.epsimage/eps875K

Figure S18. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2005 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0019-FigS19.epsimage/eps957K

Figure S19. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2006 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

gcb12164-sup-0020-FigS20.epsimage/eps954K

Figure S20. Comparison of the ratio of WUE at eCO2 to WUE at aCO2, plotted against the enhancement in CO2 for 2007 at the Oak Ridge FACE site. The dashed black line is the 1 : 1 line, whilst the solid grey line is the fit to the points, forced through the origin. Model names are given on each panel, as are the slopes of the fitted lines.

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