Evolution of the North Atlantic's Climate Over the Last 3000 Years and Comparison with Late MIS 5e

科学摘要：本提案要求支持一项多代理研究，以验证这样一种理论，即大约2000年前开始的大气冷却主要通过丹麦海峡溢流水的增加导致北大西洋西部北大西洋深水产量的增加。过去2000年的事件序列与末次间冰期（MIS 5e）末观测到的事件非常相似，表明北大西洋西部深水产量的增加标志着当前间冰期结束的开始。这项研究将包括对来自不同样带的岩心样本的详细分析，以确定整个北大西洋全新世和MIS 5e深水产量的海面温度和速率。研究的代用物包括动物群计数、厚皮乳象的稳定同位素测量（左卷和右卷）、IRD和IRD岩石学。此外，微量元素分析（Cd/Ca， Zn/Ca和Mg/Ca）将协助和检查基于动物和稳定同位素数据的解释。

Science Summary: This proposal requests support for a multiproxy study to test the theory that atmospheric cooling beginning about 2000 years ago lead to increased production of North Atlantic Deep Water in the western North Atlantic primarily through an increase in Denmark Strait Overflow water. The sequence of events in the last 2000 years is very similar to events observed at the end of the last interglacial (MIS 5e) and suggests that the increase of deep water production in the western North Atlantic marks the beginning of the end of the current interglacial. This study will include detailed analysis of samples from cores in separate transects to determine sea surface temperature and rates of Holocene and MIS 5e deep water production across the North Atlantic. Proxies to be studied include faunal counts, stable isotope measurements of N. pachyderma (left and right coiling), IRD and IRD petrology. In addition trace element analyses (Cd/Ca, Zn/Ca, and Mg/Ca) will assist and check interpretations based on faunal and stable isotope data.