Fig. 3: Net effect of the warming and cooling mode explains the long-term temperature trends during the Holocene.
From: Global temperature modes shed light on the Holocene temperature conundrum
a Temperature reconstructions based on Marcott et al. 2013 (gray and black curve) and the cooling mode (PC2) (blue curve). The gray curve shows the global mean temperature whereas the black curve shows a regional mean from 30∘N poleward. b Low-pass filtered simulated annual global mean temperature anomaly (black curve) and sum of the weighted warming (PC1) and cooling (PC2) mode (green curve). The PCs have been weighted by the global means of the corresponding spatial patterns before summation. The global mean of EOF1 is about 0.238 K and of EOF2 it is about 0.066 K. ρ is the correlation coefficient between the two curves.
