College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA.
School of Mathematics and Statistics, University College Dublin, Dublin 4, Ireland.
Science. 2017 Jan 20;355(6322):276-279. doi: 10.1126/science.aai8464.
The last interglaciation (LIG, 129 to 116 thousand years ago) was the most recent time in Earth's history when global mean sea level was substantially higher than it is at present. However, reconstructions of LIG global temperature remain uncertain, with estimates ranging from no significant difference to nearly 2°C warmer than present-day temperatures. Here we use a network of sea-surface temperature (SST) records to reconstruct spatiotemporal variability in regional and global SSTs during the LIG. Our results indicate that peak LIG global mean annual SSTs were 0.5 ± 0.3°C warmer than the climatological mean from 1870 to 1889 and indistinguishable from the 1995 to 2014 mean. LIG warming in the extratropical latitudes occurred in response to boreal insolation and the bipolar seesaw, whereas tropical SSTs were slightly cooler than the 1870 to 1889 mean in response to reduced mean annual insolation.
末次间冰期（12.9 万至 11.6 万年前）是地球历史上最近一次全球平均海平面远高于当前水平的时期。然而，末次间冰期全球温度的重建仍然存在不确定性，估计值范围从没有显著差异到比当前温度高近 2°C。在这里，我们使用一系列海面温度（SST）记录来重建末次间冰期期间区域和全球 SST 的时空变化。我们的结果表明，末次间冰期全球年平均 SST 峰值比 1870 年至 1889 年的气候平均值高 0.5°C ± 0.3°C，与 1995 年至 2014 年的平均值无法区分。在高纬度地区，末次间冰期的变暖是由于北温带辐射和两极跷跷板现象所致，而热带 SST 则比 1870 年至 1889 年的平均值略低，这是由于年平均辐射减少所致。
