Lake-Level Influences on Chironomid-Based Reconstructions of Paleotemperature

湖泊水位对基于摇蚊的古气温重建的影响

• 批准号: 0082680
• 负责人: A. Dieffenbacher-Krall
• 金额: $ 24.2万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0082680&HistoricalAwards=false
• 关键词: Lake; Level; Influences; Chironomid; Based

This award is for support of a study to determine the influence of lake-level changes on chironomid-based temperature estimates. A transect of cores from within each of two lakes in northern Maine will be examined for evidence of past water levels. Chironomid analysis will be performed on cores from both lakes. Geologic/chronologic evidence of Younger Dryas-age ice readvance in northern Maine will provide the data necessary to apply a well-developed glaciological model to determine the range of temperature and precipitation that could possibly have prevailed during this period. Chironomid estimates of temperature will be reconciled with the temperature range derived from the glaciological model, and the transfer function will also be refined with respect to lake-level. The new chironomid/lake-level transfer function will then be applied to Holocene sediments from the two lakes.

该奖项是为了支持一项研究，以确定湖泊水位变化对基于摇蚊的温度估计的影响。将对北方缅因州两个湖泊中的每一个湖泊的岩心进行横断面检查，以寻找过去水位的证据。将对两个湖泊的岩芯进行摇蚊分析。北方缅因州新仙女木时代的冰再循环的地质/年代学证据将提供必要的数据，应用一个完善的冰川学模型，以确定可能在这一时期占主导地位的温度和降水的范围。摇蚊对温度的估计将与来自冰川学模型的温度范围相一致，传递函数也将根据湖泊水位进行改进。新的摇蚊/湖平面传递函数，然后将适用于全新世沉积物从两个湖泊。