P2C2: Extreme Climate Events in the Holocene Controlled by El-Niño-Southern Oscillation (ENSO) Anomalies: Millennia-Long Stalagmite Records from the Southwest Pacific

P2C2：厄尔尼诺南方涛动（ENSO）控制的全新世极端气候事件异常：西南太平洋千年石笋记录

• 批准号: 1003586
• 负责人: Paul Aharon
• 金额: $ 41.74万
• 依托单位: University of Alabama Tuscaloosa
• 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: 2010-08-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003586&HistoricalAwards=false
• 关键词: P2C2; Extreme; Climate; Events; Holocene

This project explores the utility of speleothems from the Island of Niue as archives of climate information from the Southwest Pacific (SWP) region. The scientific objectives of the study are to: (i) acquire high resolution time-series of oxygen and carbon isotopes from speleothems spanning the Holocene; (ii) derive precise absolute chronology of the records based on a combined use of uranium/thorium dating method and floating-lamina counting chronology (iii) improve the understanding of carbon isotope variability in Niuean stalagmites; (iv) better understand rainfall variability in the SWP; and (vi) assess tropical and extra-tropical linkages by comparing contemporaneous proxy climate recordsThe primary broader impacts involve collecting data from a sparsely sampled region, creating a uniquely strong sampling strategy between modern precipitation and cave deposits, supporting undergraduate and graduate students, and building strong international collaboration with colleagues and students from Niue.

该项目探讨了纽埃岛洞穴沉积物作为西南太平洋（SWP）地区气候信息档案的实用性。 本研究的科学目标是：（i）获得全新世以来洞穴沉积物中氧和碳同位素的高分辨率时间序列;（ii）根据铀/钍定年法和浮动薄片计数年代学的结合使用，获得记录的精确绝对年代学;（iii）提高对纽埃石笋碳同位素变异性的认识;更好地了解SWP中的降雨变化;和（vi）通过比较同期的代用气候记录来评估热带和热带外的联系。主要的更广泛的影响包括从稀疏采样的地区收集数据，在现代降水和洞穴沉积物之间建立一个独特的强有力的采样策略，支持本科生和研究生，并与来自纽埃的同事和学生建立强有力的国际合作。