Strontium (Sr) Isotope and Strontium/Calcium (Sr/Ca) Ratios Variations in Speleothems from Central China: A New Proxy for Paleomonsoon Variability

中国中部洞穴沉积物中锶 (Sr) 同位素和锶/钙 (Sr/Ca) 比率的变化：古季风变化的新代理

• 批准号: 0402254
• 负责人: Hong-Chun Li
• 金额: $ 29.17万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-05-15 至 2007-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0402254&HistoricalAwards=false
• 关键词: Strontium; Sr; Isotope; Calcium; Ca

This award supports research on the variability of the East Asian Monsoon (EAM) from the recent through the late Pleistocene on centennial to millennial scales using speleothems from Buddha and Jingdong Caves in central China. High-resolution measurements from the cave sites will be collected and measured to provide information on temperature, moisture, and vegetation over the past 330,000 years. The researchers will utilize a newly developed mass balance model for Strontium isotopes to demonstrate its validity as a paleomonsoon proxy. The results will be compared with published records (i.e. Chinese loess, marine oxygen isotopes and Greenland ice) to examine the response of the EAM during periods of rapid climate change.This research will broadly impact the science community by helping develop a paleoclimate proxy that could increase climate data available from cave systems. The research project will also contribute to the training of undergraduate students and encourage international collaboration with Chinese scientists.

该奖项支持利用中国中部佛洞和京东洞穴中的洞穴来研究东亚季风从最近到晚更新世百年到千年尺度的变化。将收集和测量洞穴遗址的高分辨率测量数据，以提供过去33万年来的温度、湿度和植被信息。研究人员将利用新开发的锶同位素质量平衡模型来证明其作为古季风替代品的有效性。研究结果将与已公布的记录(即中国黄土、海洋氧同位素和格陵兰冰)进行比较，以检验EAM在快速气候变化期间的响应。这项研究将通过帮助开发古气候指标来广泛影响科学界，从而增加可从洞穴系统获得的气候数据。该研究项目还将有助于本科生的培养，并鼓励与中国科学家的国际合作。