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

丹麦海峡和冰岛-苏格兰海脊是从欧洲北欧海流入北大西洋的巨大中间水流的入口。这种“溢出”形成了全球海洋的主要深水来源。与此同时，它导致温暖的高盐地表水从大西洋平流到北欧海，因此，到今天，欧洲的气候相当温暖，但变化很大。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多个年代的变化，特别是在过去的8万年和更新世和上新世晚期的一些主要温暖间冰期。这尤其意味着重建表层的古盐度和密度梯度以及深海溢流水的不同质量和古14c年龄。利用联合的超高分辨率时间尺度基础（d -0和Milankovitch旋回），将与主题B和C一起重建高、低纬度站点之间百年至千年尺度气候变化的全球远相关。

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.