Figure 2.4: Tests of bias
adjustments to sea surface temperature (SST) using a climate model (Folland et
al., 2001). Black line - annual mean observed land surface air temperature (SAT)
anomaly (°C) from a 1946 to 1965 average (Jones, 1994), a period before major
anthropogenic warming. Red line - annual averages of four simulations of
SAT anomalies using uncorrected SST data, 1872 to 1941, and an average of six
simulations for 1941 to 1998. Blue line - average of six simulations of SAT,
forced with SST data corrected up to 1941.