Collaborative Research: Laminated Lake Sediments from the Canadian High Arctic: Understanding the Climatic Signal for Paleoclimatic Reconstruction

合作研究：加拿大高北极层状湖泊沉积物：了解古气候重建的气候信号

• 批准号: 9322768
• 负责人: Michael Retelle
• 金额: $ 12.6万
• 依托单位: Bates College
• 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: 1994-05-15 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9322768&HistoricalAwards=false
• 关键词: Collaborative; Research; Laminated; Lake; Sediments

Abstract ATM-9322768 Retelle, Michael J. Bates College Title: Laminated Lake Sediments from the Canadian High Arctic: Understanding the Climatic Signal for Paleoclimatic Reconstruction Synopsis. Ice core and other paleoclimatic records from the High Arctic suggest that summer temperatures reached minimum levels for the entire Holocene during the last 500 years, but underwent a dramatic reversal in the last 100 years. This award, under the Paleoclimate from Arctic Lakes and Estuaries (PALE) program is designed to study lake sediments from a number of sites to determine if this hypothesis is supported by the sedimentary record. To better understand the paleoclimatic signal in the sediments, a three year process-based study is planned to determine the primary controls on sediments flux and varved sediment formation in Sophia Lake, a High Arctic hypersaline, meromictic lake. Sophia Lake provides a simple topographic environment, which will facilitate efforts to isolate the primary climatic forcing. Sediments from lakes on the margin of Agassiz Ice Cap will also be recovered in order to link the paleoclimatic record of ice cores from the ice cap to sedimentary records from the glacier margin,

摘要ATM-9322768 Retelle，Michael J. Bates学院题目：加拿大高北极地区的层状湖泊沉积物：了解古气候重建的气候信号 概要。 来自北极高地的冰芯和其他古气候记录表明，在过去的500年里，夏季气温达到了整个全新世的最低水平，但在过去的100年里发生了戏剧性的逆转。 根据北极湖泊和河口的古气候（PALE）计划，该奖项旨在研究一些地点的湖泊沉积物，以确定这一假设是否得到沉积记录的支持。 为了更好地了解沉积物中的古气候信号，计划进行一项为期三年的基于过程的研究，以确定对索菲亚湖（一个高北极高盐度的部分混合湖）沉积物通量和多纹沉积物形成的主要控制。 索菲亚湖提供了一个简单的地形环境，这将有助于努力隔离的主要气候强迫。 还将采集阿加西冰帽边缘湖泊的沉积物，以便将冰帽冰芯的古气候记录与冰川边缘的沉积记录联系起来，