Late Quaternary Climate Change in the Eastern Interior of Alaska: A Multidisciplinary Pilot Study

阿拉斯加东部内陆晚第四纪气候变化：多学科试点研究

• 批准号: 9200600
• 负责人: Bruce Finney
• 金额: $ 33.9万
• 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: 1992
• 资助国家: 美国
• 起止时间: 1992-07-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200600&HistoricalAwards=false
• 关键词: Late; Quaternary; Climate; Change; Eastern

This award supports a multidisciplinary study of three lakes in eastern interior Alaska to investigate how lake-levels, vegetation, and sedimentary processes are related to climate change. The study will focus on the late Wisconsin and early Holocene (c.a. 14,000 to 6000 years B.P.), a period of marked and relatively rapid climatic change. The lakes are expected to be sensitive to climatic fluctuations and have sedimentation rates rapid enough to record high-frequency events. This work has three components: 1. assessment of the detail with which a lake-level record can be constructed; 2. comparison of high resolution records of vegetation change from fossil pollen with the lake-level record to examine how lakes and vegetation differ in their response to climate change; 3. the construction of basic hydrologic budgets for each lake and their use to estimate past values of important parameters of the hydrologic system, in particular precipitation. This project represents an element of the PALE project (Paleoclimates of Arctic Lakes and Estuaries).

该奖项支持对阿拉斯加东部内陆的三个湖泊进行多学科研究，以调查湖泊水位、植被和沉积过程与气候变化的关系。这项研究将集中在威斯康星州晚期和全新世早期(C.A.距今14000年至6000年)，这是一个显著且相对快速的气候变化时期。预计这些湖泊对气候波动很敏感，沉积速度足够快，足以记录高频事件。这项工作包括三个部分：1.评估建立湖平面记录的细节；2.比较高分辨率的化石花粉植被变化记录与湖平面记录，以研究湖泊和植被对气候变化的响应有何不同；3.编制每个湖泊的基本水文预算，并利用这些预算估算水文系统重要参数，特别是降雨量的过往数值。该项目是PALE项目(北冰洋湖泊和河口的古气候)的一个组成部分。