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

基本信息

  • 批准号:
    1702740
  • 负责人:
  • 金额:
    $ 10.85万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2017
  • 资助国家:
    美国
  • 起止时间:
    2017-06-15 至 2020-08-31
  • 项目状态:
    已结题

项目摘要

COLLABORATIVE RESEARCH: RECONSTRUCTING RATES AND SOURCES OF SEA LEVEL CHANGE OVER THE LAST ~150 THOUSAND YEARS FROM A NEW CORAL DATABASE Future sea level rise, driven by shrinking land ice and ocean warming, threatens coastal populations, economic activity, infrastructure, and ecosystems around the world. Data on past sea level positions are critical for understanding how sensitive sea level and ice sheets are to temperature change. Paleo-sea level records come from several different sources. For time periods older than about 4000 years, some of the records with the best vertical resolution and most precise ages come from coral reefs, which grow at distinctive elevation ranges with respect to mean sea level.During the Last Interglacial stage, about 125,000 years ago, global average sea-surface temperature peaked around its current level, while analyses of corals and other proxies indicate global mean sea level peaked about 6-9 m higher than today. This magnitude of sea level rise - implying considerably smaller ice sheets in Greenland and West Antarctica - hints at the long-term commitment current warming has imparted to future sea level rise. The researchers in this project will use the coral sea level database to better understand rates of sea level and ice-sheet change over time, and how these rates relate to changes in the global climate. The knowledge gained will contribute to work by this team and others in the research community on future sea level projections. The project will provide a graduate student and a postdoctoral researcher with interdisciplinary training in oceanography, geology, geophysics and statistics. It will also synthesize a global reconstruction of sea-level over the last 150,000 years, and associated numerical methods for producing this reconstruction, that can be broadly used by the research community. This project focuses on four basic questions: (1) How much did global mean sea level vary over time, and how do local, relative sea levels vary in space, over this time period? (2) How fast did global mean sea level change during the last 150,000 years, and what was the relationship between changes in sea level and changes in temperature? (3) Can the spatial patterns of sea level change be used to separate the contributions of different ice sheets to global mean sea level change? (4) How does global mean sea level reconstructed using corals compare to other continuous records of sea level and climate change? To address these questions, the researchers will: (1) develop emulators of geophysical models of glacio-isostatic adjustment and mantle dynamic topography in order to estimate the contribution of different ice sheets to sea level change, (2) refine the history of seawater uranium isotope compositions that are important to interpreting accurate ages from U-Th-dated corals, and (3) incorporate ecological data about the relationship between coral growth position and sea level into a spatio-temporal statistical framework that links together the coral database and the geophysical models. The application of these techniques to the coral database for the last 150,000 years will provide a uniquely high-precision, continuous record of global mean sea level variability over this time period. This reconstruction will enable a more precise estimate of the magnitude of global mean sea level variability and rates of global mean sea level change, and should allow discrimination between global mean sea level contributions from North American and Arctic sources and those from Antarctic sources. These reconstructions will provide data with which to test the ice sheet models used to project future changes in addition to supporting the career development of a postdoctoral scholar and the training of a Ph.D. student.
合作研究:从一个新的珊瑚数据库重建过去15万年来海平面变化的速率和来源未来海平面上升由陆冰缩小和海洋变暖驱动,威胁着世界各地的沿海人口、经济活动、基础设施和生态系统。过去海平面位置的数据对于了解海平面和冰盖对温度变化的敏感性至关重要。古海平面记录来自几个不同的来源。对于超过4000年的时间段,一些具有最佳垂直分辨率和最精确年龄的记录来自珊瑚礁,珊瑚礁生长在与平均海平面不同的海拔范围内。在大约125,000年前的最后一次间冰期阶段,全球平均海面温度达到峰值,接近目前的水平,而对珊瑚和其他指标的分析表明,全球平均海平面的峰值比今天高出约6-9米。海平面上升的幅度--意味着格陵兰岛和南极洲西部的冰盖要小得多--暗示着目前的变暖对未来海平面上升的长期承诺。该项目的研究人员将使用珊瑚海平面数据库来更好地了解海平面和冰盖随时间变化的速率,以及这些速率与全球气候变化的关系。所获得的知识将有助于该小组和研究界其他人就未来海平面预测开展工作。该项目将为一名研究生和一名博士后研究员提供海洋学、地质学、地球物理学和统计学方面的跨学科培训。它还将综合过去15万年的全球海平面重建,以及可供研究界广泛使用的产生这种重建的相关数值方法。这个项目关注四个基本问题:(1)全球平均海平面随时间的变化有多大,当地的相对海平面在这段时间内在空间上是如何变化的?(2)在过去的15万年里,全球平均海平面变化的速度有多快,海平面变化与温度变化之间的关系是什么?(3)海平面变化的空间模式能否被用来区分不同冰盖对全球平均海平面变化的贡献?(4)与其他连续记录的海平面和气候变化相比,用珊瑚重建的全球平均海平面是如何变化的?为了解决这些问题,研究人员将:(1)开发冰川均衡调整和地幔动态地形地球物理模型的模拟器,以便估计不同冰盖对海平面变化的贡献;(2)完善海水铀同位素组成的历史,这对于根据U-Th测年珊瑚的准确年龄具有重要意义;以及(3)将关于珊瑚生长位置和海平面之间关系的生态数据纳入一个将珊瑚数据库和地球物理模型连接起来的时空统计框架。将这些技术应用于过去15万年的珊瑚数据库,将提供这一时期全球平均海平面变化的独特的高精度连续记录。这种重建将能够更准确地估计全球平均海平面变化的幅度和全球平均海平面变化率,并应能够区分来自北美和北极来源的全球平均海平面贡献与来自南极来源的全球平均海平面贡献。这些重建将提供数据,以测试用于预测未来变化的冰盖模型,此外还支持博士后学者的职业发展和博士生的培训。

项目成果

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Centennial- to millennial-scale sea-level change during the Holocene and Last Interglacial periods
全新世和末次间冰期期间百年至千年规模的海平面变化
  • DOI:
    10.22498/pages.25.3.148
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kopp, Robert E;Dutton, A;Carlson, AE
  • 通讯作者:
    Carlson, AE
A statistical framework for integrating nonparametric proxy distributions into geological reconstructions of relative sea level
将非参数代理分布整合到相对海平面地质重建中的统计框架
  • DOI:
    10.5194/ascmo-8-1-2022
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Ashe, Erica L.;Khan, Nicole S.;Toth, Lauren T.;Dutton, Andrea;Kopp, Robert E.
  • 通讯作者:
    Kopp, Robert E.
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Andrea Dutton其他文献

Management of measles in a traveller community: Public health issues of trust, choice and communication
  • DOI:
    10.1016/j.puhe.2007.07.020
  • 发表时间:
    2008-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Fiona Reynolds;Marko Petrovic;Sheila Will;Andrea Dutton;Keith Paver;Aidan Kirkpatrick;Jeanette Kempster
  • 通讯作者:
    Jeanette Kempster
Submerged archaeological sites along the Ionian coast of southeastern Sicily (Italy) and implications for the Holocene relative sea-level change
  • DOI:
    10.1016/j.yqres.2008.03.008
  • 发表时间:
    2008-07-01
  • 期刊:
  • 影响因子:
  • 作者:
    Giovanni Scicchitano;Fabrizio Antonioli;Elena Flavia Castagnino Berlinghieri;Andrea Dutton;Carmelo Monaco
  • 通讯作者:
    Carmelo Monaco
Warming of +1.5 °C is too high for polar ice sheets
全球升温 1.5°C 对极地冰盖来说过高了
  • DOI:
    10.1038/s43247-025-02299-w
  • 发表时间:
    2025-05-20
  • 期刊:
  • 影响因子:
    8.900
  • 作者:
    Chris R. Stokes;Jonathan L. Bamber;Andrea Dutton;Robert M. DeConto
  • 通讯作者:
    Robert M. DeConto
Deglacial sea-level history preserved in Hawaiian drowned reef terraces and implications for understanding global records
夏威夷沉礁台地保存的冰消海平面历史及其对理解全球记录的影响
  • DOI:
  • 发表时间:
    2015
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kelsey L. Sanborn;Jody M. Webster;Yusuke Yokoyama;Stephen M. Eggins;Juan-C Braga;Andrea Dutton;David A. Clague;Jennifer B. Paduan;John J. Rooney;John R. Hansen;Daniel Wagner
  • 通讯作者:
    Daniel Wagner
不均質な液体が創る界面は均質か不均質か?
由异质液体产生的界面是均质的还是异质的?
  • DOI:
  • 发表时间:
    2016
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kelsey L. Sanborn;Jody M. Webster;Yusuke Yokoyama;Stephen M. Eggins;Juan-C Braga;Andrea Dutton;David A. Clague;Jennifer B. Paduan;John J. Rooney;John R. Hansen;Daniel Wagner;谷村吉隆;大内幸雄
  • 通讯作者:
    大内幸雄

Andrea Dutton的其他文献

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{{ truncateString('Andrea Dutton', 18)}}的其他基金

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:
    2041325
  • 财政年份:
    2020
  • 资助金额:
    $ 10.85万
  • 项目类别:
    Standard Grant
Early Career: Acquisition of a MC-ICP-MS for Research and Education in U-series Geochemistry and Applications in Geosciences
早期职业生涯:购买 MC-ICP-MS,用于 U 系列地球化学和地球科学应用的研究和教育
  • 批准号:
    1660318
  • 财政年份:
    2017
  • 资助金额:
    $ 10.85万
  • 项目类别:
    Continuing Grant
Towards a Global Reconciliation of Last Interglacial Sea Level Observations
实现最后一次间冰期海平面观测的全球协调
  • 批准号:
    1155495
  • 财政年份:
    2012
  • 资助金额:
    $ 10.85万
  • 项目类别:
    Standard Grant

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  • 项目类别:
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