High Resolution Lake Sediment Studies for Paleoclimatic Reconstruction in the Canadian High Arctic

题目：高分辨率湖泊沉积物研究对加拿大高北极地区古气候重建的影响该奖项将支持一个项目，该项目旨在将加拿大高北极地区变化沉积物的夏季温度记录扩展到过去2-3000年。这将把几个世纪以来观察到的巨大变化置于一个更长远的角度。特别是，大约1000年前，在所谓的中世纪暖期，将被研究其全球意义。多种测年方法将用于提供年代学的可信度，并建立该地区的长期古地磁记录。这可以作为一个年代模板来帮助确定其他低有机碳沉积记录的年代。选定流域的水文研究将澄清气候对这些湖泊沉积物通量的控制，并改进对恢复的不同沉积物记录的古气候解释。通过将这些观测结果与早期工作相结合，将开发一个气候控制北极湖泊沉积物通量的综合概念模型。

Abstract ATM-9708071 Bradley, Raymond University of Massachusetts Title: High Resolution Lake Sediment Studies for Paleoclimatic Reconstruction in the Canadian High Arctic This award will support a project designed to extend the record of summer temperature derived from varved sediments in the Canadian High Arctic to cover the last 2-3000 years. This will place the dramatic changes observed over the few centuries into a longer term perspective. In particular, conditions around 1,000 years ago, during the so-called Medieval Warm Period, will be examined for its the global significance. Multiple dating approaches will be used to provide confidence in the chronology and to establish a secular paleomagnetic record for the region. This can then be used as a chronological template to help in dating other sedimentary records which are low in organic carbon. Hydrological studies in selected basins will clarify the climatic controls on sediment flux to these lakes and improve paleoclimatic interpretations of the varved sediment records recovered. By combining these observations with earlier work, a comprehensive conceptual model of the climatic controls on sediment flux to arctic lakes will be developed.