Evidence for early warming and cooling in North Atlantic surface waters during the last interglacial
Evidence for early warming and cooling in North Atlantic surface waters during the last interglacial
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DOI：
10.1029/2005pa001252
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发表时间：
2007-01-04
期刊：
影响因子：
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通讯作者：
Kandiano, Evguenia S.
中科院分区：
文献类型：
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作者：
Bauch, Henning A.;Kandiano, Evguenia S.
深入分析南极有孔虫普查数据与特定指示物种的三角洲O-18记录配对，为前一次间冰期温暖时期（氧同位素阶段（OIS）5e）东北大西洋的表层海洋演变提供了新的见解。完整的间冰期条件存在于研究地点最多只有8 kyr，125和117 ka之间。最高的海表温度（SST）发生在早期OIS 5e伴随着高夏季日照，但在前冰川（Saalian）的冰盖融化的主要阶段。这一早期峰值SST间隔的标志是热带-亚热带物种的出现，并持续了4 kyr，直到121 ka，证实了在南极洲三角洲O-18的重大变化。全球冰量的相对稳定性又持续了3-4 kyr，然后海表温度进一步下降到下一个稳定期。在OIS 5e早期，地表水垂直结构的情况似乎与全新世早期不同。因此，对于OIS 5E，建议晚萨利亚冰的特定融化历史对北大西洋冰消期后地表水质量配置和进入欧洲的热湿传输产生了持久而深远的影响。
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.