SGER: Quantifying subglacial erosion rates and Timing of Holocene warm periods by in-situ 14C/10Be - A proof of concept

SGER：通过原位 14C/10Be 量化冰下侵蚀率和全新世温暖期的时间 ​​- 概念证明

• 批准号: 0834294
• 负责人: Joerg Schaefer
• 金额: $ 4.09万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0834294&HistoricalAwards=false
• 关键词: SGER; Quantifying; subglacial; erosion; rates

This project will develop and apply a novel in situ carbon-14/beryllium-10 (14C/10Be) chronometer as a tool to quantify periods during which mountain glaciers and ice-sheets were smaller than today. The results will provide a semi-continuous record of fluctuations of the Rhone Glacier during the Holocene, which can be combined with glacier energy balance models to estimate temperature and precipitation changes. The project will also aid in providing a better understanding of the patterns and rates of subglacial erosion beneath an alpine type glacier, and it will afford a calibration for the new isotopic earth surface process tool, which could be applied in many other glacier and ice-sheet systems globally. The research will quantify the duration in which glaciers were smaller than today and, in turn, infer key information related to climate warm periods, which will provide relevant information concerning the present-day global warmth. This is a neglected area of investigation, since we often operate under the assumption that recent climate change has been continuously in one direction. This research has the potential to provide realistic constraints on the extent and nature of previous warm episodes and to develop a method for extending this analysis to other parts of the globe.

该项目将开发和应用一种新的原位碳-14/铍-10（14 C/10 Be）精密计时器，作为量化山地冰川和冰盖比今天小的时期的工具。结果将提供一个半连续的记录，罗纳冰川的波动在全新世，它可以结合冰川能量平衡模型来估计温度和降水量的变化。 该项目还将有助于更好地了解高山型冰川下冰下侵蚀的模式和速度，并将为新的同位素地球表面过程工具提供校准，该工具可应用于全球许多其他冰川和冰盖系统。这项研究将量化冰川比今天小的持续时间，从而推断出与气候变暖时期有关的关键信息，这将提供有关当今全球变暖的相关信息。这是一个被忽视的调查领域，因为我们经常在假设最近的气候变化一直在一个方向上持续进行。这项研究有可能对以往暖期的程度和性质提供现实的限制，并制定一种方法，将这种分析扩展到地球仪的其他地区。