Past Interglacial Temperature Regimes (PAINTER): Marine isotope stages 11 in the NE-Atlantic sector

在从事气候变化研究的科学家中，人们普遍认为，海洋同位素第11阶段在许多方面可以被视为相当于全新世最近间冰期条件的更新世。然而，与这种看法相反，我们自己在北半球高纬度地区的古海洋学研究指出，在这两个间冰期期间，大气和海洋环流的主要结构存在系统性差异。因此，本项目的目标是评估同位素阶段11是否确实可以作为适当的间冰期模型来描述现在和未来的全新世气候变化。通过分析北方半球第11和第1阶段的海面条件，我们将采用比较方法，研究北大西洋涛动的根本不同模式在多大程度上决定了这两个温暖时期之间的具体气候差异。详细地说，我们计划使用一系列地球化学、微体古生物学和沉积学代用指标，用广泛的方法来分析第11阶段和全新世的气候特征。这些方法将在若干海洋沉积物岩心取样点进行，这些取样点描述北大西洋的南北断面，即从副极地到亚热带地区，并包括从西地中海一个取样点采集的沉积物样品，以供比较。

Within the community of scientists working on climate change it is widely believed that marine isotope stage 11 can in many ways be seen as the Pleistocene equivalent to the recent interglacial conditions of the Holocene. However, in contrast to this perception our own paleoceanographic studies from the high-northern latitudes point to systematic differences in the principle configuration of atmospheric and oceanic circulation during these two interglacial intervals. The goal of this project is therefore to evaluate whether isotopic stage 11 may indeed be taken as the adequate interglacial model to describe present and future Holocene climate change. Using a comparative approach by analysing sea surface conditions during stages 11 and 1 in the Northern Hemisphere we will investigate to what extent a fundamentally different pattern of the North Atlantic Oscillation may have determined the specific climate difference between these two warm periods. In detail, we plan to analyze the climate character of stage 11 and the Holocene with a broad methodological approach using a series of geochemical, micropaleontological, and sedimentological proxies. These methods will be carried out on a number of marine sediment core sites describing a North-South transect in the North Atlantic, i.e from the subpolar to the subtropical region, and including sediment samples from a single site in the western Mediterranean Sea for comparison.