Figure 2: Comparison of statistically estimated effects of temperatures on observed and simulated US yields in irrigated counties.
From: Consistent negative response of US crops to high temperatures in observations and crop models
Unconstrained irrigation is assumed on the irrigated areas specified by MIRCA2000 (ref. 24). Columns are maize (a,d), soybean (b,e) and wheat (c,f). a–c show regression coefficients and d–f show irrigated counties (black outlines) with their per cent land-use share (colours) of the respective crop. Counties are considered as irrigated if >75% of the crop-specific-harvested area is irrigated. Black and blue lines in a–c represent coefficients γh for observed and simulated yields, respectively. Shaded areas are 95% confidence intervals. Results for individual models are shown in Supplementary Fig. 33.