The Role of the Arctic Ocean in Global Climate: Identifying the Ice Export from the Arctic Ocean into the Greenland Sea During the Last 300 KA by IRF Tracers

该项目旨在评估过去300,000年间北冰洋冰流入格陵兰和冰岛海的规模和时间。北极冰川的出口和融化可能为该地区提供了比之前认为的更多的淡水。由于淡水被认为是减少深水形成的重要因素，温盐传送带可能会减少温暖的北大西洋水的东北流动。这项研究将分析格陵兰岛北部和冰岛海测年准确的岩芯中的冰筏碎屑，并将铁氧化物成分和颗粒岩性与北极大陆架和陆地来源的岩性进行匹配。对这些测年岩心进行对比，将能够与全球古气候记录进行比较，并更好地评估北极在全球气候中的作用。

ABSTRACT OPP-9614451 DARBY OLD DOMINION UNIVERSITY RESEARCH FOUNDATION This project is designed to assess the magnitude and timing of the Arctic Ocean ice influx into the Greenland and Iceland Seas during the last 300,000 years. Arctic glacial ice export and melting might have provided more freshwater to this region than previously considered. Because freshwater is thought to be important in decreasing the formation of deep water, the thermohaline conveyor might reduce the northeastern flow of warm North Atlantic water. This study will analyze ice-rafted detritus in well-dated cores from the northern Greenland and Iceland Seas, and match Fe oxide composition and grain lithologies to those from the Arctic shelves and land sources. Correlation of these dated cores will enable a comparison to global paleoclimatic records and a better assessment of the role of the Arctic in global climate.