Fig. 1: Reconstructed north-western Pacific sea surface temperature.
From: Roles of insolation forcing and CO2 forcing on Late Pleistocene seasonal sea surface temperatures
a Alkenone-based temperature record for Site U1429 (three-point running mean, purple line) and G. ruber Mg/Ca temperature record for Site U1429 (three-point running mean, orange line) over the past 400 kyr. Power spectral density of b G. ruber Mg/Ca temperature, c alkenone temperature, d Antarctic composite CO2 concentration49 (Antarctic Ice Core Chronology 2012 age model), and e orbital insolation at the latitude of 31.6°N. Yellow, grey, and green shaded areas indicate the glacial period, termination, and inception, respectively. Glacial inception periods are denoted as I1, I2, and I33, and glacial termination periods are indicated as T1, T2, T3, and T423.
