Environmental Engineering Reference
In-Depth Information
Local Warming (C˚) for:
Low Latitudes
Mid-High Latitudes
0
1.2
2.4
3.6
0
1.5
3.0
4.5
Local Warming (C˚) for:
Low Latitudes
Mid-High Latitudes
0
1.2
2.4
3.6
4.8
0
1.5
3.0
4.5
6.0
FIGURE 5.1 Average expected impact of warming + CO
2
increase on crop yields, without adaptation, for
broad regions summarized in IPCC AR4 (left) and for selected crops and regions with detailed studies
(right). Shaded area shows likely range (67%). Impacts are averages for current growing areas within each
region and may be higher or lower for individual locations within regions. Temperature and CO
2
changes
for the IPCC summary (left) are relative to late 20th century, while changes estimated for regions (right)
were computed relative to pre-industrial. Estimates were derived from various sources (Matthews et al.,
1995; Lal et al., 1998; Easterling et al., 2007; Schlenker and Roberts, 2009; Schlenker and Lobell, 2010) (see
methods in Appendix for details).
