Medina-Elizalde Martín, Lea David W
Department of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93106-9630, USA.
Science. 2005 Nov 11;310(5750):1009-12. doi: 10.1126/science.1115933. Epub 2005 Oct 13.
A sea surface temperature (SST) record based on planktonic foraminiferal magnesium/calcium ratios from a site in the western equatorial Pacific warm pool reveals that glacial-interglacial oscillations in SST shifted from a period of 41,000 to 100,000 years at the mid-Pleistocene transition, 950,000 years before the present. SST changes at both periodicities were synchronous with eastern Pacific cold-tongue SSTs but preceded changes in continental ice volume. The timing and nature of tropical Pacific SST changes over the mid-Pleistocene transition implicate a shift in the periodicity of radiative forcing by atmospheric carbon dioxide as the cause of the switch in climate periodicities at this time.
基于赤道西太平洋暖池一处地点浮游有孔虫镁钙比得出的海面温度（SST）记录显示，在距今95万年的中更新世转型期，SST的冰期 - 间冰期振荡周期从41000年转变为100000年。这两个周期的SST变化与东太平洋冷舌SST同步，但早于大陆冰量的变化。中更新世转型期热带太平洋SST变化的时间和性质表明，大气二氧化碳辐射强迫周期的转变是此时气候周期转变的原因。
