Late Quaternary Climate and Vegetation History of the Alaskan North Slope: Calibration of Modern Data

阿拉斯加北坡晚第四纪气候和植被历史：现代数据的校准

• 批准号: 9123449
• 负责人: Linda Brubaker
• 金额: $ 21.57万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-15 至 1994-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123449&HistoricalAwards=false
• 关键词: Late; Quaternary; Climate; Vegetation; History

Determining possible responses of Arctic ecosystems to global warming requires an understanding of both the past and present tundra communities. Although the distribution and composition of modern North American tundra communities are relatively well documented, the late-Quaternary history of their development remains poorly known. This award supports an examination of the paleovegetation and paleoclimate of far northern Alaska over the last 18,000 years as a means of improving our knowledge of terrestrial-climate system interactions in Low Arctic settings. This research, as part of the PALE initiative, will analyze lake sediments from a suite of sites located in 4 tundra types of the Alaska North Slope. This work will concentrate on calibrating modern pollen, moss spores, and lignin compounds with surrounding vegetation and climatic parameters to assess their ability to accurately reconstruct past environments and will apply these calibrations to a set of fossil records chosen during the modern sampling. The proposed research addresses the goals of PALE by describing the late-Quaternary history of a poorly know Low Arctic region, by calibrating paleoenvironmental indicators, and by increasing the resolution of lake records for defining variations within tundra environments.

确定北极生态系统对气候变化的可能反应 全球变暖需要了解过去和未来， 现在的苔原群落。 虽然分布和 现代北美苔原群落的组成是 相对有据可查，晚第四纪的历史， 发展仍然知之甚少。 该奖项支持 古植被和古气候的研究 北方阿拉斯加在过去的18,000年作为一种手段 提高我们对陆地气候系统的认识 低北极地区的相互作用。 这项研究，作为 PALE计划将分析一系列湖泊沉积物， 位于阿拉斯加北坡的4种苔原类型。 这 工作将集中在校准现代花粉，苔藓孢子， 和木质素化合物与周围的植被和气候 参数来评估他们准确重建过去的能力， 环境，并将这些校准应用于一组化石 在现代采样期间选择的记录。 拟议研究 通过描述晚第四纪， 一个鲜为人知的低北极地区的历史，通过校准 古环境指标，并通过提高分辨率 用来定义冻土带内的变化 环境.