Collaborative Research: Holocene Hydrologic Variability across the Western Pacific Warm Pool

合作研究：西太平洋暖池全新世水文变化

• 批准号: 1003700
• 负责人: Judson Partin
• 金额: $ 50.46万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-01-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003700&HistoricalAwards=false
• 关键词: Collaborative; Research; Holocene; Hydrologic; Variability

This project explores any spatial and temporal changes in precipitation over the Holocene (last 10,000 years) across the Western Pacific Warm Pool (WPWP) from hydrologic records generated from speleothems from Guam, Solomon Islands, Vanuatu, and the Philippines. The overall goal of the research is to determine if the tropical Pacific played an active or passive role in driving the changes in the global hydrological cycle over the Holocene.The research questions being pursued include: Did insolation forcing directly cause meridional changes associated with the monsoon and InterTropical Convergence Zone (ITCZ) in the WPWP over the Holocene? Did external insolation forcing induce internal changes in the tropical Pacific via zonal changes, or ENSO, to cause precipitation changes in the WPWP over the Holocene?Specific objectives of the project include: 1) measuring Uranium-series ages and oxygen isotopic composition of speleothem samples from Guam, Vanuatu, the Solomon Islands, and the Philippines for the last 10,000 years at decadal-scale resolution; 2) determining the spatial and temporal hydrologic variability across the WPWP for the last 10,000 years by comparing paleoclimate records from sites that experience different climate dynamics to separate the influence of ENSO dynamics and monsoon dynamics on WPWP; and 3) returning to the sites in the WPWP to collect additional speleothems, cave dripwaters, bedrock and soils to ensure that we accurately interpret the speleothem recordsThe broader impacts involve linking paleoclimate reconstructions with hydrologic studies. This provides potential benefits for regional and local water resources management. The project would also support a post-doctoral fellow at the University of Texas at Austin and a M.S. student at the University of Guam.

该项目通过关岛、所罗门群岛、瓦努阿图和菲律宾的洞穴沉积物产生的水文记录，探讨了西太平洋暖池（WPWP）全新世（过去10，000年）降水的时空变化。研究的总体目标是确定热带太平洋是否在推动全新世全球水文循环的变化中发挥了积极或消极的作用，正在进行的研究问题包括：太阳辐射强迫是否直接导致全新世WPWP中与季风和热带辐合带（ITCZ）相关的纬向变化？外部日射强迫是否通过纬向变化或ENSO引起了热带太平洋的内部变化，从而导致全新世WPWP的降水变化？该项目的具体目标包括：（1）以十年尺度分辨率测量关岛、瓦努阿图、所罗门群岛和菲律宾近一万年来洞穴沉积物样品的铀系年龄和氧同位素组成; 2）确定过去10年WPWP的时空水文变化，通过比较不同气候动力学背景下的古气候记录，区分ENSO动力学和季风动力学对WPWP的影响;以及3）返回WPWP中的站点以收集额外的洞穴沉积物，洞穴滴水，更广泛的影响包括将古气候重建与水文研究。 这为区域和地方水资源管理提供了潜在的好处。 该项目还将支持德克萨斯大学奥斯汀分校的一名博士后研究员和一名硕士研究生。关岛大学的学生。