Collaborative Research: Paleohydrology Across Central Alaska: A Multiproxy Approach to Lake-Level Records

合作研究：阿拉斯加中部的古水文学：湖水位记录的多代理方法

• 批准号: 9707398
• 负责人: Bruce Finney
• 金额: $ 14.14万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9707398&HistoricalAwards=false
• 关键词: Collaborative; Research; Paleohydrology; Across; Central

ATM-9707625 Abbott, Mark B. University of Massachusetts ATM-9709398 Finney, Bruce P. University of Alaska Title: Paleohydrology Across Central Alaska: A Multiproxy Approach to Lake-Level Records The primary objective of this project is to produce new multi-proxy paleoclimate records from Central Alaska to test hypotheses concerning the cause of shifts in the precipitation-evaporation balance from 18 ka to present. The award supports research to: (i) expand the network of sites with decadal to century-scale lake- level data to identify the spatial and temporal pattern of changes in the precipitation-evaporation balance and (ii) identify fluctuations in the moisture balance for the past 2000 years at annual to decadal-scale from closed basin Dune Lake. These records are needed to understand the long-term atmospheric dynamics of the Arctic and to assess the significance of shifts in the precipitation-evaporation balance. The Holocene climate history of the region will be reconstructed with a series of studies analyzing the sedimentology, geochemistry, magnetic properties, pollen content, stable isotopic composition, and for the first time in the Arctic, biomarker compounds. The lake cores will be dated at high- resolution by 137Cs, 210Pb and AMS 14C measurements on macrofossils and pollen.

ATM-9707625 Abbott, Mark B. 马萨诸塞大学 ATM-9709398 Finney, Bruce P. 阿拉斯加大学 标题：阿拉斯加中部的古水文学：湖泊水位记录的多代理方法 该项目的主要目标是从阿拉斯加中部生成新的多代理古气候记录，以检验有关 18 年降水蒸发平衡变化原因的假设 ka 来介绍。 该奖项支持以下研究：(i) 扩大具有十年至百年尺度湖水位数据的站点网络，以确定降水-蒸发平衡变化的空间和时间模式；(ii) 确定过去 2000 年封闭盆地沙丘湖每年至十年尺度水分平衡的波动。 需要这些记录来了解北极的长期大气动态并评估降水蒸发平衡变化的重要性。 该地区的全新世气候历史将通过一系列研究来重建，这些研究分析了沉积学、地球化学、磁性、花粉含量、稳定同位素组成，以及首次在北极进行的生物标记化合物。 将通过对大型化石和花粉进行 137Cs、210Pb 和 AMS 14C 测量来对湖芯进行高分辨率测年。