Eastern Arctic Climate of the Past 2,000 Years: The Varved Lake Sediment Record

北极十年至百年尺度气候变化的模式和原因 对气候变化的了解很少， 因为过去环境变化的年度记录， 这个区域很稀疏。 该奖项支持检索 巴芬岛的气候记录网络跨越了过去500年， 两千年 将从三个湖泊中采集岩芯。 纹管 年表将使用210铅和炸弹进行严格测试 放射性核素 化石花粉、纹藻的年时间序列 厚度，和Ge/Si比将产生。 这一努力将 产生了第一个年度古气候网络， 北极湖泊沉积物的古生态时间序列 这 该项目将是第一个PALE（北极湖泊和 河口）努力绘制出几十年到世纪的模式- 这是过去1000年的规模变化。

The patterns and causes of arctic decade- to century-scale climate variability are poorly understood, most significantly because annually-dated records of past environmental change from this region are sparse. This award supports the retrieval of a Baffin Island network of climate records spanning the last 500 to 2000 years. Cores will be collected from three lakes. The varve chronologies will be tested rigorously using 210-Pb and bomb radionuclides. Annually-dated time series of fossil pollen, varve thickness, and Ge/Si ratios will be generated. This effort will yield the first network of annually-dated paleoclimate and paleoecological time series from arctic lake sediments. This project will be the first PALE (Paleoclimates for Arctic Lakes and Estuaries) effort to map out the patterns of decade-to century- scale change of the past 1000 years.