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

该奖项使用资金开发蒙大拿州Flathead湖的古水文学和古湖泊学的多代理记录，利用冬季积雪排放到湖中的记录。这一记录将用于确定该地区极端水文事件的自然变率，并与阿留申低气压、急流和几个气候指数的位置相关联。将进行实地工作，从湖中获得长岩心，并将在实验室开发排放（粒度）和水文气候（硅藻和介形虫）的替代指标。代理指标将使用现有的覆盖历史间隔的短岩心进行校准，然后再应用于较长的下岩心序列。该研究中心的广泛影响是提供有关该地区气候突变性质以及主要水文事件的频率、持续时间和大小的重要信息。这些又直接适用于水资源管理和预测人为变化将如何影响该地区的水文。

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.