NOAA/WDS Paleoclimatology - Yamamoto et al. 2005 Northwestern Pacific 144KYr Alkenone SST Estimates

We have generated a high-resolution record of alkenone sea surface temperature (SST) between 10ŋ24 ka from Core MD01-2421 off central Japan, in the northwestern Pacific. The cooling by 5°C from 21 ka to 12.8 ka implies the equatorward shift of the subarctic boundary in the northwestern Pacific by ~2.8° in latitude. This shift was a result of the stronger summer Okhotsk High. The Okhotsk High was likely enhanced by the combined effects of El Niņo-like conditions in the tropical Pacific and the heating of the land surface of northeastern Siberia.

我们针对西北太平洋日本中部外海的MD01-2421岩芯（Core MD01-2421），重建了10~24 ka期间的高分辨率烯酮海表温度（alkenone sea surface temperature, SST）记录。该记录显示，21 ka至12.8 ka期间海表温度下降了5℃，这表明西北太平洋副极地边界（subarctic boundary）向赤道方向偏移了约2.8个纬度。此次偏移由夏季更强盛的鄂霍次克高压（Okhotsk High）所导致。而鄂霍次克高压的增强，可能是热带太平洋类厄尔尼诺状态与西伯利亚东北部陆地加热共同作用的结果。