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

DARBY OLD DOMINION大学研究基金会该项目旨在评估过去30万年中北冰洋冰涌入格陵兰海和冰岛海的规模和时间。北极冰川冰的输出和融化可能为该地区提供了比以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，温盐输送带可能会减少北大西洋暖水的东北流。这项研究将分析来自格陵兰北部和冰岛海的年代久远的岩心中的浮冰碎屑，并将铁氧化物组成和颗粒岩性与来自北极大陆架和陆地来源的岩石相匹配。这些年代久远的岩心的相关性将使我们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.