P2C2: Holocene and Late Pleistocene Climate Change in Tropical South America Based on Speleothems from the Peruvian Andes

P2C2：基于秘鲁安第斯山脉洞穴化石的南美洲热带地区全新世和晚更新世气候变化

• 批准号: 1003466
• 负责人: Stephen Burns
• 金额: $ 29.18万
• 依托单位: University of Massachusetts Amherst
• 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: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003466&HistoricalAwards=false
• 关键词: P2C2; Holocene; Late; Pleistocene; Climate

This project explores the use of speleothems from caves in the central Peruvian Altiplano to produce high resolution time series of delta oxygen-18 isotopes over the Holocene and Late Pleistocene time periods. The researcher, and his colleagues, postulate that the time series would be a direct proxy for regional delta oxygen-18 of precipitation, which is correlative with both the amount of precipitation on the Altiplano and to the intensity and mean location of the South American Summer Monsoon (SASM).The specific aims of the research are to investigate the use of delta oxygen-18 to potentially produce: i) decadally-resolved records of the Holocene to investigate sub-orbital climate variability; ii) 500-year annually-resolved series during the early and late Holocene and the Last Glacial Maximum (LGM) and last interglacial to study El Nino/Southern Oscillation (ENSO) variability; iii) 50-year resolution records of the glacial transition to better define the nature and timing of this critical climate transition in the tropics; and iv) 50-year resolution records of climate during the last glacial period, the last interglacial period, and beyond.The primary broader impacts involve supporting a female graduate student in her studies and the development of English and Spanish language versions of a study guide for Haugapo Cave in Peru to be used locally and elsewhere.

该项目探讨了秘鲁高原中部洞穴中的洞穴沉积物的使用，以产生全新世和晚更新世时期三角洲氧-18同位素的高分辨率时间序列。 研究人员和他的同事们假设，时间序列将是降水的区域三角洲氧-18的直接代理，这与高原上的降水量以及南美夏季风（SASM）的强度和平均位置相关。研究的具体目的是调查三角洲氧-18的使用可能产生：（一）全新世的十年分辨率记录，以研究亚轨道气候变化;（二）全新世早期和晚期以及末次冰盛期和末次间冰期的500年年度分辨率系列，以研究厄尔尼诺/南方涛动变化; ㈢冰川过渡的50年分辨率记录，以更好地确定热带这一关键气候过渡的性质和时间;末次冰期、末次间冰期、更广泛的主要影响包括支持一名女研究生的学习，以及编写秘鲁Haugapo洞穴学习指南的英文和西班牙文版本，供当地使用，其他地方