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

基本信息

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

项目摘要

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.

该项目探索利用秘鲁高原中部洞穴中的洞穴化石来生成全新世和晚更新世时期 δ 氧 18 同位素的高分辨率时间序列。研究人员和他的同事假设，该时间序列将是区域降水 Delta O-18 的直接代表，它与高原上的降水量以及南美夏季的强度和平均位置相关。季风（SASM）。该研究的具体目标是调查 Delta O-18 的用途，以潜在地产生： i) 全新世的年代际解析记录，以调查亚轨道气候变化； ii) 全新世早期和晚期以及末次盛冰期 (LGM) 和末次间冰期期间的 500 年年度解析序列，用于研究厄尔尼诺/南方涛动 (ENSO) 的变化； iii) 冰川过渡 50 年分辨率记录，以更好地确定热带地区这一关键气候过渡的性质和时间； iv) 末次冰期、末次间冰期及以后气候的 50 年分辨率记录。主要的更广泛的影响包括支持一名女研究生的学习以及开发英语和西班牙语版本的学习指南秘鲁豪加波洞穴在当地和其他地方使用。