Collaborative Research: P2C2--A 5-million-year Record of Western Mediterranean Sea Level Variability

合作研究：P2C2——西地中海海平面500万年变化记录

• 批准号: 1602685
• 负责人: Victor Polyak
• 金额: $ 31.74万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-05-01 至 2020-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1602685&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; million; year

This collaborative award generally aims to establish a new stable sea level site in Mallorca, Spain, through the study of phreatic overgrowths on speleothems (POS) from littoral caves. Specifically, the researchers aim to establish age control by precisely measuring overgrowths by Uranuium/Lead U/Pb dating to determine the timing, position, and duration of sea-level high stands in the western Mediterranean basin over the past 5 million years using cave deposits that grow exactly at sea level.Implications of sea-level reconstructions centered on the POS from this island's littoral caves are fundamental for understanding the glacial isostatic adjustment (GIA) in the western Mediterranean basin. The data generated by this research will better constrain estimates of Pliocene and early Pleistocene sea-level, without being plagued by the large uncertainties associated with proxies available for this time period.New data could be used to improve GIA corrections. This is important because current published sea level highstands during past interglacial climate are significantly above modern sea level and vary widely over time. The precision of such results are still controversial and accurate data to realistically evaluate potential sea level by the century's end is critical. This project involves training for several graduate and undergraduate students, outreach efforts in Mallorca and in Florida, production of a documentary film on the caves, and strong and meaningful international scientific collaborations.

该合作奖项的总体目标是通过研究沿海洞穴中洞穴生物 (POS) 的潜水过度生长，在西班牙马略卡岛建立一个新的稳定海平面地点。 具体来说，研究人员的目标是通过铀/铅U/Pb定年法精确测量过度生长，利用洞穴沉积物确定过去500万年地中海西部盆地海平面高位的时间、位置和持续时间，从而建立年龄控制以该岛沿海洞穴的 POS 为中心的海平面重建的意义对于了解西地中海盆地的冰川均衡调整 (GIA) 至关重要。 这项研究生成的数据将更好地限制对上新世和早更新世海平面的估计，而不会受到与该时期可用代理相关的巨大不确定性的困扰。新数据可用于改进 GIA 校正。 这很重要，因为当前公布的过去间冰期气候期间的海平面高位明显高于现代海平面，并且随着时间的推移变化很大。 这些结果的精确度仍然存在争议，准确的数据对于本世纪末实际评估潜在海平面至关重要。 该项目包括对多名研究生和本科生的培训、在马略卡岛和佛罗里达州的外展工作、制作有关洞穴的纪录片以及强有力且有意义的国际科学合作。