Climate and geodynamic control of past changes in thermohaline circulation and faunal exchange through the Denmark Strait

丹麦海峡和冰岛-苏格兰海岭是从欧洲北欧海域流入北大西洋的中间水流的门户。这种“溢流”形成了全球海洋的主要深水源。同时，它导致温暖和高盐分的地表水从大西洋平流到北欧海洋，从而导致欧洲今天相当温暖但变化很大的气候。本研究的目的是追踪以丹麦海峡为中心的温盐环流系统在地质时期的数十年分辨率的变化，特别是过去 8 万年以及更新世和晚上新世的一些主要温暖间冰期阶段。这尤其意味着重建表层的古盐度和密度梯度，以及深海溢出水的质量差异和古14C年龄……高纬度和低纬度地点之间的百年到千年尺度气候变化的全球遥相关将与主题B和C一起重建，使用基于D-0和米兰科维奇周期的联合超高分辨率时间尺度。

The Denmark Strait and Iceland-Scotland Ridge serve as gateways for giant currents of intermediate water flowing from the European Nordic Seas into the North Atlantic. This 'Overflow' forms a main deepwater source for the global ocean. At the same time it leads to the advection of warm and highly saline surface water from the Atlantic into the Nordic Seas and thus, to todays fairly warm, but highly variable climate in Europe. It is the objective of this study to trace the variablity of the thermohaline circulation system focussed in the Denmark Strait at multidecadal resolution over geological times, specifically for the last 80.000 years and for some of the major warm interglacial stages in the Pleistocene and Late Pliocene. This especially implies the reconstruction of the paleosalinity and density gradients in the surface layer and of the differential quality and paleo-14C ages of the Overflow water in the deep ocean... Global teleconnections of centennial-to-millennialscale climate change between high and low-latitude sites will be reconstucted together with Themes B and C, using a joint ultrahigh-resolution time scale bases onD-0 and Milankovitch cycles.