Collection and Analysis of Sediments as Part of the Three- Ship Expedition to the Central Arctic Ocean During the Summer of 1991

极地高纬度地区对气候变化最为敏感。1991年夏天，一个由三艘破冰船组成的国际考察队将出发，进行为期70天的探险，以探索和采样北极中部鲜为人知的东部地区。该奖项将支持收集90多个沉积物岩芯，为科学界提供来自该大洋盆地内部的第一批主要岩心材料。此外，要收集的材料类型(即盒状岩心、巨型重力岩心和大直径活塞岩心)旨在克服现有岩心存在的岩心顶部回收率差和岩心直径非常窄的限制。这项研究将侧重于过去25,000年来北冰洋沉积的沉积物，以解决北冰洋表层水稳定同位素特征的时间和地理变异性以及北冰洋中部对中全新世变暖(即过热)的反应等问题。这项工作还将有助于确定欧亚北极魏氏晚期冰盖的范围和解体模式。

The high polar latitudes are amongst the most sensitive to climatic changes. In the summer of 1991 an international team of three ice-breakers will depart on a 70 day expedition to explore and sample the largely unknown eastern sector of the central Arctic. This award will support the collection of upwards of 90 sediment cores to provide the scientific community with the first major collection of core materials from the interior of this ocean basin. In addition, the type of materials to be collected (i.e. boxcores, giant gravity cores, and large diameter piston cores) are designed to overcome the poor coretop recovery and very narrow core diameter limitations present in the existing cores. This research will focus on Arctic Ocean sediments deposited during the last 25,000 years to address questions of the temporal and geographic variability in the stable isotopic signature of Arctic surface waters and the response of the central Arctic Ocean to mid-Holocene warming (i.e. Hypsithermal). This work will also help to define the extent and disintegration pattern of the late Weichselian Ice Sheets in the Eurasian Arctic.