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

本项目采用新的高分辨率显微分析技术对以色列Soreq洞穴的洞穴化石进行分析。气候目标是研究在气候变化期间洞穴沉积物中记录的水文季节性，如末次极大冰期（LGM），从LGM到间冰期（包括Heinrich事件H1，Bølling-Allerød和新仙女木期），以及全新世期间的其他极端潮湿和干旱事件。该项目的分析目标是开发自LGM以来多个时间间隔的同位素和微量元素记录的年度至次年度时间分辨率。具体来说，研究人员和他的同事们将使用离子探针来分析稳定的同位素比率（氧和碳）和微量元素，以亚年分辨率；共聚焦激光荧光显微镜对年生长带的成像激光烧蚀电感耦合等离子体质谱（la - icp -质谱）测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，检查干旱地区的气候强迫和影响，支持研究生，促进强有力的国际合作。

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.