Fig. 1: Trend in NDVImax and GPPmax across global grasslands.
From: Decadal trends in global grassland growth peaks and their drivers since the 1980s
a, b Long-term variations in NDVImax and GPPmax for global grasslands over the periods 1982–2021/2020 and 1998–2009. The annual NDVImax and GPPmax represent the area-weighted mean values across all grassland pixels in our dataset for each year. c, e NDVImax trend over 1982–2021 and 1998–2009 at the pixel level across global grasslands. d, f GPPmax trend over 1982-2020 and 1998–2009 at the pixel level across global grasslands. Solid and dotted lines in (a, b) represent the linear regression trend over 1982–2021 and 1998–2009, with shaded bands representing 95% confidence intervals of the fitted trends. *** and # in (a, b) indicates a significant linear regression trend (two-sided t-tests of slope coefficients) at P < 0.001 and P < 0.1. The statistically significant regions (P < 0.1) are represented by hatching points in (c–f). Source data are provided as a Source Data file.
