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Evidence for early warming and cooling in North Atlantic surface waters during the last interglacial

机译：末次冰期之间北大西洋地表水域早期升温和降温的证据

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摘要

In-depth analysis of planktic foraminiferal census data paired with delta O-18 records of specific indicator species provides new insight into the surface ocean evolution of the northeast Atlantic during the previous interglacial warm period ( oxygen isotope stage (OIS) 5e). Full interglacial conditions existed at the study site for a maximum of only 8 kyr, between 125 and 117 ka. Highest sea surface temperatures (SSTs) occurred during early OIS 5e concomitant with high summer insolation but after the main phase of ice sheet melting of the preceding glaciation (Saalian). This early peak SST interval is marked by the appearance of tropical-subtropical species and lasted for 4 kyr until 121 ka, as corroborated by a major change in planktic delta O-18. Relative stability in global ice volume continued for another 3-4 kyr before SSTs dropped further toward the next stadial. During early OIS 5e the situation of the surface water vertical structure appears to have been different from the early Holocene. For OIS 5e it is therefore suggested that the particular melting history of late Saalian ice had a long-lasting and profound effect on both postdeglacial surface water mass configuration in the North Atlantic and heat-moisture transfer into Europe.
机译：对浮游有孔虫普查数据的深入分析，与特定指示物物种的三角洲O-18记录相结合，提供了对先前冰期间暖期（氧同位素阶段（OIS）5e）东北大西洋表层海洋演化的新见解。研究现场存在最大的冰间期条件，最大仅8 kyr，介于125和117 ka之间。最高的海面温度（SST）发生在OIS 5e早期，伴随着夏季的强烈日照，但发生在前一次冰期融化的冰盖的主要阶段之后（萨利期）。这个早期的峰值SST间隔以热带亚热带物种的出现为标志，持续了4年，直到121 ka，这主要是由浮游三角洲O-18的重大变化所证实的。全球冰量的相对稳定性又持续了3-4年，之后SST进一步下降到下一个球场。在OIS 5e早期，地表水垂直结构的状况似乎与早期全新世不同。因此，对于OIS 5e，有人建议晚萨利期冰的特殊融化历史对北大西洋的冰期后地表水水体构造以及热湿转移到欧洲都具有持久而深刻的影响。

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