Fig. 4: A superposed epoch analysis (SEA) comparison between the last millennium reanalysis (LMR)31,32 reconstruction and the Li et al.12 reconstruction.
From: A re-appraisal of the ENSO response to volcanism with paleoclimate data assimilation

a SEA of the Niño 3.4 reconstruction LMR (Corals+Li13b6) regarding all the 22 events over the past millennium. b The large eruption events defined by different criteria: the volcanic explosivity index47 greater than 4 (VEI > 4) and the volcanic stratospheric sulfur injection greater than 6 (VSSI > 6). c–f Superposed epoch analysis (SEA) of LMR (Corals+Li13b6) regarding the defined large eruption events based on VSSI > 6 over 1300–2000 CE, VSSI > 6 over 1300–1850 CE, VEI > 4 over 1300–2000 CE, and VEI > 4 over 1300–1850 CE, respectively. g–j Same as subplots (c–f), but for the Li et al.12 reconstruction (denoted as Li13).