Fig. 3: Multidecadal variation of SST phase from ERA5.
From: The phase change in the annual cycle of sea surface temperature
a The time series of regional averaged summer phase in the North Pacific Ocean (red) and winter phase in the North Atlantic Ocean (blue), and the SST phase trends in b summer and c winter during 1960–1990. Dots and curves represent the phases of individual years and 5-year running means, respectively. Two domains are denoted by black boxes in b and c. Significance is denoted by markers, as in Fig. 2.
