Understanding Rapid and Gradual Climate Change from the Record in Large Lakes: Late Pleistocene and Holocene Sedimentation in Flathead Lake, Montana

从大型湖泊的记录中了解快速和渐进的气候变化：蒙大拿州弗拉特黑德湖的晚更新世和全新世沉积

• 批准号: 0214273
• 负责人: Marc Hendrix
• 金额: $ 28.23万
• 依托单位: University of Montana
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0214273&HistoricalAwards=false
• 关键词: Understanding; Rapid; Gradual; Climate; Change

This award uses funds to develop a multiproxy record of the paleohydrology and paleolimnology of Flathead Lake, Montana utilizing the discharge record into the lake from winter snowpack. This record will be used to determine the natural variability of extreme hydrologic events in the region and correlated to the position of the Alleutian Low, jet stream, and several climatic indices.Field work will be undertaken to obtain long cores from the lake and proxy indicators of discharge (grain size) and hydroclimate (diatoms and ostracodes) will be developed in the laboratory. Proxy indicators will be calibrated using existing short cores covering historic intervals before being applied to the longer down-core sequences. The broader impacts of this proposed research center on providing important information on the nature of abrupt climate change as well as the frequency, duration and magnitude of major hydrologic events in the region. These in turn are directly applicable to management of water resources and prediction of how anthropogenic changes will effect hydrology of the region.

该奖项使用资金，利用冬季积雪向湖中排放的记录，开发了蒙大拿州平头湖古水文学和古湖泊学的多代理记录。这一记录将被用来确定该地区极端水文事件的自然变异性，并与阿留申低气压、急流和几个气候指标的位置相关联。将进行实地工作，从湖中获取长岩芯，并将在实验室开发流量(粒度)和水文气候(硅藻和介形虫)的替代指标。代理指标将使用覆盖历史间隔的现有短岩心进行校准，然后再应用于较长的下部岩心序列。这项拟议研究的更广泛影响在于提供关于气候突然变化的性质以及该区域主要水文事件的频率、持续时间和规模的重要信息。这些反过来又直接适用于水资源管理和预测人为变化将如何影响该区域的水文。