Late Quaternary Climates of Western Beringia

西白令海峡晚第四纪气候

• 批准号: 9317569
• 负责人: Patricia Anderson
• 金额: $ 58.24万
• 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: 1994
• 资助国家: 美国
• 起止时间: 1994-04-15 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317569&HistoricalAwards=false
• 关键词: Late; Quaternary; Climates; Western; Beringia

Abstract ATM-9317569 Anderson, Patricia M. Brubaker, Linda B. University of Washington Title: Late Quaternary Climate of Western Beringia This award supports a project under paleoclimates in Arctic Lakes and Estuaries (PALE), a program that focuses on the timing, magnitude, and rates of change in arctic climates during the late Quaternary. Understanding the complex regional responses to past shifts in global climate requires: 1) the compilation of numerous well-dated records of paleoclimate indicators (e.g., pollen); 2) the calibration of these proxies by defining their modern climatic relationships; and 3) the comparison of climatic histories inferred from the paleo-data to qualitative or quantitative paleoclimatic models. Although such data set are available from lakes in many areas of the North American and European Arctic, comparable information is virtually absent from northern Siberia. This award supports a project designed to analyze pollen, spores, plant macrofossils, and sediment geochemistry of lake cores to reconstruct the late Quaternary vegetation and climate of Western Beringia (northeast Siberia). These histories will be reconstructed for six study areas, which today encompass the range of vegetation and climate in far northeast Russia. Analyses of surficial lake muds will improve the definition of modern pollen- vegetation-climate relationships and aid the paleoclimatic interpretation of fossil data. The new Russian data will allow a more detailed description of trans-Beringian paleovegetational patterns and inferred paleoclimates. Definition of such broad- scale patterns will help paleo-data/GCM comparisons for the Arctic, thereby improving the understanding of high latitude responses to global climatic changes.

摘要 ATM-9317569 Anderson、Patricia M. Brubaker、Linda B. 华盛顿大学 标题：西白令海峡晚第四纪气候 该奖项支持北极湖泊和河口古气候 (PALE) 项目，该项目重点研究第四纪晚期北极气候变化的时间、幅度和速率。 了解区域对过去全球气候变化的复杂反应需要：1）汇编大量有日期的古气候指标记录（例如花粉）； 2）通过定义这些指标的现代气候关系来校准这些指标； 3）从古数据推断的气候历史与定性或定量古气候模型的比较。 尽管北美和欧洲北极许多地区的湖泊都可以提供此类数据集，但西伯利亚北部实际上缺乏类似的信息。 该奖项支持一个旨在分析花粉、孢子、植物大化石和湖心沉积物地球化学的项目，以重建西白令海峡（西伯利亚东北部）的晚第四纪植被和气候。 这些历史将针对六个研究区域进行重建，这些区域今天涵盖了俄罗斯远东北部的植被和气候范围。 对表层湖泥的分析将改善现代花粉-植被-气候关系的定义，并有助于化石数据的古气候解释。 俄罗斯的新数据将能够更详细地描述跨白令海峡的古植被模式和推断的古气候。 这种大尺度模式的定义将有助于北极的古数据/GCM 比较，从而增进对高纬度地区对全球气候变化反应的理解。