Fig. 4

Change in cold tongue seasonality with the longitude of perihelion in Erb et al. (2015). Climatological monthly mean SST averaged over 6° S–6° N across the Pacific basin (145–275°E) for a perihelion at northern hemisphere winter solstice (LOP = 90°); b perihelion at vernal equinox (LOP = 180°); c perihelion at northern hemisphere summer solstice (LOP = 270°); and d perihelion at autumnal equinox (LOP = 0°). e Shows the simulation with eccentricity set to zero (e = 0). Note that the month axis here is such that 0 is the start of the year and 12 is the end; mid-January is thus 0.5