Collaborative Research: P2C2--Constraints on Last Interglacial and Late Holocene Global Mean Sea Level and Fingerprinting Polar Ice Mass Flux from Broadly Distributed Coastal Caves
合作研究:P2C2——对末次间冰期和晚全新世全球平均海平面的约束以及广泛分布的沿海洞穴的极地冰质量通量指纹识别
基本信息
- 批准号:2202698
- 负责人:
- 金额:$ 6.84万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-07-01 至 2025-06-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
This project aims to advance the knowledge of global mean sea level (GMSL) and characterize the relative contribution of ice sheets and glaciers to GMSL variations. The researchers will use geological records preserved in cave deposits to reconstruct the GMSL history over the last 130.000 years from multiple locations (Mediterranean Sea, Yucatan Peninsula, Philippine Sea), and to study sea-level high stands during past warm climates. With over one third of the world’s population living within coastline regions, assessing the regional vulnerability to future-sea level rise is of societal relevance and requires an understanding of the magnitude, rate, and drivers of past sea level fluctuations to put current trends in context. This will be achieved by direct sea level estimates provided by coastline mineralogical records, namely phreatic overgrowth on speleothems which form at sea level on partly submerged caves.Phreatic overgrowths on speleothems (POS) are precise and accurate indicators of local sea level changes during critical periods of the ice age, including the Mid-Pliocene Warm period, the Last Interglacial (LIG) and the Late Holocene. This project aims to analyze existing POS archives and to expand this archive to include several promising cave sites. The scientific goals are encapsulated in several core research questions: 1) What is the temporal variability of GMSL from the LIG to the Late Holocene and what is the phasing between peak GMSL and the initiation of global scale warming; 2) What are the relative contributions of the major polar ice sheets to this variability and is there evidence of hemispheric teleconnections?; and 3) to what extent is the GMSL rise and acceleration anomalous relative to the record of GMSL across the Late Holocene? The researchers will develop a near continuous GMSL curve for climate warm intervals derived from high temporally and vertically well resolved POS observations linked to state of the art statistical and geophysical modelling. The observations include U-series chronologies, high-resolution stable isotope analyses of C and O, and mineralogical and petrographical analyses to constrain timing and duration of peak sea-level high stands. Additionally, numerical simulations of Glacial Isostatic Adjustment (GIA) will be used to correct GMSL record from the impact of GIA. The potential Broader Impacts (include a greater knowledge and a better understanding of the magnitude and drivers of sea level rise. This has direct implication for different scientific communities investigating key relationships between sea level, ice sheets, Earth’s climate, and properties of the solid earth. Further, the newly developed knowledge will be of a broad societal relevance as it will potentially benefit coastal communities, stakeholders, and policy makers. This project will provide education and research training for graduate and undergraduate students at the universities of South Florida, New Mexico and Harvard who will be involved in many aspects of the interdisciplinary research. Additionally, the results of this research will be communicated through teaching at the various project institutions. The researchers will disseminate the project findings with the relevant scientific communities via peer-reviewed publication and presentation at national and international conferences. The research finding will be also disseminated to the broader public through public presentations, popular science articles and media coverage. Educational material will be developed for outreach activities at the studied caves, including underwater images and videos. The data collected during this project will be made publicly accessible.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
本项目旨在提高对全球平均海平面(GMSL)的认识,并表征冰盖和冰川对GMSL变化的相对贡献。研究人员将利用保存在洞穴沉积物中的地质记录,从多个地点(地中海、尤卡坦半岛、菲律宾海)重建过去13万年的GMSL历史,并研究过去温暖气候下的海平面高度。由于世界上三分之一以上的人口生活在海岸线地区,评估该地区对未来海平面上升的脆弱性具有社会意义,需要了解过去海平面波动的幅度、速度和驱动因素,以便综合考虑当前趋势。这将通过海岸线矿物学记录提供的直接海平面估计来实现,即在海平面上部分淹没的洞穴上形成的洞穴上的潜水过度生长。洞穴上的潜水过度生长(POS)是反映上新世中期暖期、末次间冰期和全新世晚期等冰期关键时期当地海平面变化的精确指标。该项目旨在分析现有的POS档案,并将该档案扩展到几个有前途的洞穴遗址。科学目标概括为几个核心研究问题:1)从LIG到晚全新世GMSL的时间变异性是什么? GMSL峰值与全球尺度变暖开始之间的相位是什么?2)主要极地冰盖对这种变率的相对贡献是什么?是否有半球遥相关的证据?3)相对于晚全新世的GMSL记录,GMSL上升和加速在多大程度上是异常的?研究人员将开发一个接近连续的GMSL曲线,用于气候变暖区间,该曲线来源于与最先进的统计和地球物理模型相关联的高时间和垂直分辨率的POS观测。观测包括u系列年代学、C和O的高分辨率稳定同位素分析,以及矿物学和岩石学分析,以限制海平面高峰的时间和持续时间。此外,还将利用冰川均衡调整(GIA)的数值模拟来校正冰川均衡调整对GMSL记录的影响。潜在的更广泛的影响(包括对海平面上升的幅度和驱动因素的更多认识和更好理解)。这对研究海平面、冰盖、地球气候和固体地球特性之间的关键关系的不同科学界有直接的影响。此外,新开发的知识将具有广泛的社会相关性,因为它将潜在地使沿海社区、利益相关者和决策者受益。该项目将为南佛罗里达、新墨西哥和哈佛大学的研究生和本科生提供教育和研究培训,他们将参与跨学科研究的许多方面。此外,这项研究的结果将通过在各个项目机构的教学进行交流。研究人员将通过同行评议的出版物和在国家和国际会议上的报告向相关科学界传播项目发现。研究结果还将通过公开演讲、科普文章和媒体报道向更广泛的公众传播。将为所研究洞穴的外联活动编制教育材料,包括水下图像和录像。在此项目中收集的数据将向公众开放。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Jerry Mitrovica其他文献
Jerry Mitrovica的其他文献
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{{ truncateString('Jerry Mitrovica', 18)}}的其他基金
Collaborative Research: The Lake Superior Basin: Natural Geomorphic Experiment, Deepwater-Terminating Ice Stream, and Isostatically Adjusting Rift
合作研究:苏必利尔湖盆地:自然地貌实验、深水终止冰流和均衡调整裂谷
- 批准号:
2218460 - 财政年份:2022
- 资助金额:
$ 6.84万 - 项目类别:
Standard Grant
Collaborative Research: Imaging the 3D Viscosity Structure of the Antarctic Mantle with Existing Observations from GPS and Relative Sea Level
合作研究:利用 GPS 和相对海平面的现有观测结果对南极地幔的 3D 粘度结构进行成像
- 批准号:
2142593 - 财政年份:2022
- 资助金额:
$ 6.84万 - 项目类别:
Standard Grant
Collaborative Research: Constraining West Antarctic Ice Sheet Elevation during the last Interglacial
合作研究:限制末次间冰期期间南极西部冰盖的海拔
- 批准号:
1744927 - 财政年份:2018
- 资助金额:
$ 6.84万 - 项目类别:
Continuing Grant
Collaborative Research: P2C2 - Reconstructing rates and sources of sea-level change over the last ~150 thousand years from a new coral database
合作研究:P2C2 - 从新的珊瑚数据库重建过去约 15 万年海平面变化的速率和来源
- 批准号:
1702684 - 财政年份:2017
- 资助金额:
$ 6.84万 - 项目类别:
Standard Grant
CSEDI Collaborative Research: Anelastic properties of the Earth from seismic to tidal timescale
CSEDI 合作研究:从地震到潮汐时间尺度的地球滞弹性特性
- 批准号:
1464033 - 财政年份:2015
- 资助金额:
$ 6.84万 - 项目类别:
Continuing Grant
Collaborative research: Sea-level variability during the Common Era
合作研究:公元元年海平面变化
- 批准号:
1458907 - 财政年份:2015
- 资助金额:
$ 6.84万 - 项目类别:
Standard Grant
Collaborative research: Sea-level responses to sediment erosion and deposition over the past 3 million years
合作研究:过去 300 万年海平面对沉积物侵蚀和沉积的响应
- 批准号:
1527351 - 财政年份:2015
- 资助金额:
$ 6.84万 - 项目类别:
Continuing Grant
Collaborative Research: The impact of time-dependent mantle rheology and 3-D structure on models and observations of Glacial Isostatic Adjustment
合作研究:随时间变化的地幔流变学和三维结构对冰川均衡调整模型和观测的影响
- 批准号:
1315368 - 财政年份:2013
- 资助金额:
$ 6.84万 - 项目类别:
Continuing Grant
Studies of Mantle Dynamics and Evolution
地幔动力学和演化研究
- 批准号:
1215061 - 财政年份:2012
- 资助金额:
$ 6.84万 - 项目类别:
Continuing Grant
Collaborative Research: P2C2 -- Statistical estimation of past ice sheet volumes from paleo-sea level records
合作研究:P2C2——根据古海平面记录对过去冰盖体积的统计估计
- 批准号:
1203414 - 财政年份:2012
- 资助金额:
$ 6.84万 - 项目类别:
Standard Grant
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