Late Quaternary Climatic and Vegetation History of the Alaskan North Slope: Part II, Analysis of Paleo Records

阿拉斯加北坡晚第四纪气候和植被历史：第二部分，古记录分析

• 批准号: 9423392
• 负责人: Linda Brubaker
• 金额: $ 55.27万
• 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: 1995
• 资助国家: 美国
• 起止时间: 1995-04-15 至 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423392&HistoricalAwards=false
• 关键词: Late; Quaternary; Climatic; Vegetation; History

Abstract ATM-9423392 Brubaker,Linda B. University of Washington Title: Late Quaternary Climatic and Vegetation History of the Alaskan North Slope: Part II, Analysis of Paleo Records Beringia (far northwest Canada, Alaska, and northeast Siberia) is an important region of paleoclimate study for the NSF program Paleoclimate of Arctic Lakes and Estuaries (PALE) because it remained unglaciated during the late Quaternary and experienced extensive changes in paleogeography due to changing sea levels. This research is designed to describe the late Quaternary climate history of the North Slope (ca. 150,000 years BP to present) through the analysis of proxy climate indicators in a suite of lake sediment cores on the Alaskan North Slope. The research will: 1) describe temporal and spatial variations in the pollen, spores, plant macrofossils and selected geochemical properties, 2) interpret variations in paleoclimate from proxy indicators (using analytical approaches and large modern calibration data sets for the interpretation of pollen data), and 3) infer potential causes of paleoclimatic variations using a conceptual framework of large scale controls of eastern Beringian climate and climate model simulations as part of ongoing PALE paleoclimate projects. Results of the proposed research will contribute directly to PALE's goal of documenting circumarctic paleoclimate variability.

摘要ATM-9423392 Brubaker，琳达B. 华盛顿大学题目：晚第四纪气候和植被历史 阿拉斯加北坡：第二部分，古记录分析 白令海（加拿大西北部、阿拉斯加和西伯利亚东北部）是美国国家科学基金会北极湖泊和河口古气候研究计划（PALE）的重要古气候研究区域，因为它在第四纪晚期没有冰川作用，并且由于海平面的变化而经历了广泛的古地理变化。 本研究旨在描述北坡晚第四纪的气候历史。150，000年BP到现在）通过分析阿拉斯加北坡的一套湖泊沉积物岩心中的代用气候指标。 该研究将：1）描述花粉，孢子，植物宏化石和选定的地球化学性质的时间和空间变化， 2)从代用指标中解释古气候变化（使用分析方法和用于解释花粉数据的大型现代校准数据集），以及3）使用东柏林气候和气候模型模拟的大规模控制的概念框架推断古气候变化的潜在原因，作为正在进行的PALE古气候项目的一部分。 拟议的研究结果将直接有助于PALE记录环北极古气候变化的目标。