Change in global surface temperature
relative to 1850-1900
1.0C
Reconstructed
multi-model average
Observed
0.5
0
‘Very likely’ range
for reconstructions
-0.5
1AD
500
1000
1500
2020
1.0C change in global surface temperature relative to 1850-1900
Reconstructed
multi-model average
Observed
0.5
0
‘Very likely’ range
for reconstructions
-0.5
1AD
500
1000
1500
1850
2020