P2C2: Seasonality from Speleothems--High-Resolution Ion Microprobe Studies at Soreq Cave, Israel

P2C2：洞穴化石的季节性——以色列 Soreq 洞穴的高分辨率离子微探针研究

• 批准号: 1003487
• 负责人: John Valley
• 金额: $ 16.38万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003487&HistoricalAwards=false
• 关键词: P2C2; Seasonality; Speleothems; Resolution; Ion

This project applies new high-resolution micro-analytical techniques to speleothems from Soreq Cave (Israel). The climate goal is to examine hydrological seasonality as recorded in cave deposits during periods of climatic change such as the last glacial maximum (LGM), the transition from the LGM to the interglacial (including Heinrich event H1,Bølling-Allerød, and the Younger Dryas), and other extreme wet and drought events during the Holocene.The analytical goal of the project is to develop annual to sub-annual time resolution in the isotope and trace element records across multiple time intervals since the LGM. Specifically, the researcher and his colleagues will employ an ion microprobe to analyze stable isotope ratios (Oxygen & Carbon) and trace elements at sub-annual resolution; confocal laser fluorescent microscopy to image annual growth bands; and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-mass spectrometry) to determine the age of calcite precipitation. The primary broader impacts involve exploring new analytical tools for climate research, examining climate forcing and impacts in arid regions, supporting a graduate student, and promoting strong international collaborations.

该项目将新的高分辨率微分析技术应用于Soreq洞穴（以色列）的洞穴沉积物。气候目标是研究在气候变化时期，如末次冰期最大期（LGM），从LGM到间冰期的过渡期，洞穴沉积物中记录的水文季节性。（包括海因里希事件H1，Bølling-Allerød和新仙女木事件），和其他极端的湿和干旱事件在全新世。该项目的分析目标是发展年度至次-LGM以来多个时间间隔的同位素和微量元素记录的年时间分辨率。 具体而言，研究人员和他的同事将采用离子微探针以亚年度分辨率分析稳定同位素比（氧碳）和微量元素;共聚焦激光荧光显微镜对年度生长带进行成像;激光烧蚀电感耦合等离子体质谱法（LA-ICP-质谱法）确定方解石沉淀的年龄。主要的更广泛的影响包括探索新的气候研究分析工具，研究气候强迫和干旱地区的影响，支持研究生，并促进强有力的国际合作。