Collaborative Research: P2C2--Western Equatorial Pacific Rainfall during the Holocene - New Interannual Records from High Resolution Borneo Stalagmites

合作研究：P2C2——全新世西赤道太平洋降雨——高分辨率婆罗洲石笋的新年际记录

• 批准号: 1354034
• 负责人: David Lund
• 金额: $ 14.1万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1354034&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; Western; Equatorial

The aim of this collaborative project is to reconstruct long-term and short-term changes in the El Nino Southern Oscillation (ENSO) using high-growth rate, precisely dated speleothems from caves in Borneo. Using the speleothems, the researchers would produce 150- to 300-year time series of changes in delta 18-Oxygen for five key time periods during the Holocene. The research addresses several science questions, such as: 1) Was ENSO absent or just weaker in the early Holocene? 2) Did the frequency or magnitude of El Nino events change on centennial time scales during the late Holocene? 3) Were low-frequency changes in western equatorial Pacific precipitation driven by ENSO or by migration of the Inter-Tropical Convergence Zone (ITCZ)? and 4) Can the impact of ENSO on tropical rain forest productivity be detected using speleotherm stable isotopic records?The broader impacts include the training off a female postdoctoral researcher and the mentoring of undergraduates involved with the research project. Data would be archived at the National Climatic Data Center.

该协作项目的目的是使用高增长速度（伯爵洞穴的洞穴精确居民）重建El Nino Southern振荡（ENSO）的长期和短期变化。使用speleothems，研究人员将在全新世期间在五个关键时期内产生150至300年的时间序列。该研究解决了几个科学问题，例如：1）在全新世早期缺乏或只是较弱？ 2）在全新世晚期期间，El Nino事件的频率或幅度是否在百年纪念时间尺度上发生变化？ 3）西赤道太平洋降水的低频变化是由ENSO驱动还是通过热带融合区（ITCZ）迁移的？ 4）ENSO对使用Speletherm稳定的同位素记录检测到ENSO对热带雨林生产力的影响吗？更广泛的影响包括培训女性的博士后研究人员以及对研究项目涉及的本科生的指导。 数据将在国家气候数据中心存档。