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.

该项目探讨了西太平洋暖池（WPWP）从关岛，所罗门群岛，瓦努阿图和菲律宾产生的水文记录中整个全新世（WPWP）降水的任何空间和时间变化。这项研究的总体目标是确定热带太平洋在推动全新世的全球水文周期变化方面发挥了积极或被动的作用。所提出的研究问题包括：失去损失迫使直接导致与季风和间质收敛区（ITCZ）在WPWP上造成的子午线变化？外部的缓和迫使强迫通过区域变化或ENSO引起热带太平洋的内部变化，以引起WPWP的降水变化，而该项目的具体目标包括：1）测量铀系列的年龄，以及从鸟类，武士，vanuatus，vanuatu的菲律宾群体中的氧气同位素组成，以实现近距离的菲斯特群岛，以及乌拉多克斯的成分。 解决; 2）通过比较来自经历不同气候动态的地点的古气候记录，以分离ENSO动力学和季风动态对WPWP的影响，从而确定WPWP的空间和时间水文变异性； 3）返回WPWP中的地点，以收集其他棘手，洞穴滴水器，基岩和土壤，以确保我们准确地解释了棘皮动物的记录，更广泛的影响涉及将古气候重建与水文研究联系起来。 这为区域和当地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和A M.S.的博士后研究员。关岛大学的学生。