补充数据关于模型拟合图的解释的注释(补充图1-7):为清楚起见,以下模型拟合数字可视化二维表面的二维表面。在每个补充图1-7中,面板(a)是产量与温度的关系,当降水保持恒定时(以估计的最佳为单位)。同样,面板(b)代表当温度恒定时(以估计的最佳量)保持温度时产量与总年沉淀的关系。The amount of scatter in observed yields around the fitted curves in supplementary figures 1-7 is a consequence of (a) viewing the three-dimensional raw data in two dimensions, (b) differences in technological inputs in different regions where data come from, but which share similar climatic conditions, (c) change in technological input over time for the same region, and (d) unaccounted for variability (sources are discussed in the methods部分;有关模型拟合和变化源的进一步详细讨论,请参见附录I。