Mean value, standard deviation (SD), and coefficient of variation (CV) of modeled and statistical estimates of grassland productivity and NDVI time series for four European countries, as well as correlation coefficient (<i>r</i>) between each pair.

Note: To represent interannual variability, long-term trends were removed in all series (detrended) before the calculation of r. M vs. S, r between modeled and statistical grassland productivity; M vs. N, r between modeled productivity and NDVI. r values in bold indicate a statistically significant correlation (with P < 0.05). Modeled productivity time series are from 1961 to 2010; statistical productivity time series are from 1973 to 2005 (for Germany from 1985 to 2005); NDVI time series are from 1982 to 2010. a The periods of time series that use for the calculation of r and P-value. Mean value, standard deviation (SD), and coefficient of variation (CV) of modeled and statistical estimates of grassland productivity and NDVI time series for four European countries, as well as correlation coefficient (r) between each pair.