Reconstruction of changes in the atmospheric convection activity in the tropical Pacific Ocean during the last 150,000 years using hydrogen isotopes of biomarkers

通过对热带太平洋5个地点海洋岩心生物标志物的分析，重建了热带太平洋的大气对流活动。古地温记录表明，末次消冰期冷舌萎缩，西太平洋暖池扩张，纬向温度梯度松弛。来自南海南部的脂肪酸氘记录与来自婆罗洲北部的石笋记录不一致。后者与古地温记录一致，表明纬向温度梯度和对流中心位置随岁差的变化而变化。

We reconstructed the atmospheric convection activity in the tropical Pacific by analyzing biomarkers in marine cores retrieved from five locations in the tropical Pacific. Paleotemperature records demonstrated that the cold tongue shrunk, the western Pacific warm pool expanded, and zonal temperature gradient was relaxed during the last deglaciation. A deuterium record of fatty acids from the southern South China Sea disagrees with a published stalagmite record from northern Borneo. The latter is consistent with paleotemperature records, suggesting that zonal temperature gradient and the position of convection center has varied in response to precession.