Collaborative research: Construction of a continuous, high resolution and absolutely-dated marine chronology from the Gulf of Maine during the last millennium

合作研究：构建近千年来缅因湾的连续、高分辨率和绝对日期的海洋年表

• 批准号: 1003438
• 负责人: Alan Wanamaker
• 金额: $ 30万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1003438&HistoricalAwards=false
• 关键词: Collaborative; research; Construction; continuous; resolution

Reconstructing and understanding the spatiotemporal patterns of late Holocene climate variability remains a fundamental challenge in paleoclimatology, particularly with respect to coupled systems such as the North Atlantic Oscillation (NAO) and the Atlantic meridional overturning circulation (AMOC). Records with absolute chronologies on annual or better timescales have offered the most robust data for quantitative climate reconstructions, however such records are generally limited to terrestrial regions or the tropical oceans. This collaborative research between scientists from Iowa State University and the University of Maine uses sclerochronological analysis of the growth increments of the long-lived bivalve Arctica islandica to generate annually resolved records of temperature in the Gulf of Maine covering the last 1000 years. The PIs explore the specific relationship among the NAO mode, NAO extremes, seawater temperature, and shell growth rate and chemistry, as well as the response of the ocean-climate system in the Gulf of Maine to rapid climate changes during the last millennium. The results from this research shed light on climate change in a region that will affect large populations in the 21st century. Graduate and undergraduate students are participating in the research, and the PIs are working with a variety of regional research centers to interactive displays highlighting the research.

重建和理解全新世晚期气候变率的时空模式仍然是古气候学的一个基本挑战，特别是对于北大西洋涛动（NAO）和大西洋经向翻转环流（AMOC）等耦合系统而言。年度或更好的时间尺度上的绝对年表记录为定量气候重建提供了最可靠的数据，但此类记录通常仅限于陆地区域或热带海洋。爱荷华州立大学和缅因大学的科学家进行的这项合作研究，利用对长寿双壳类 Arctica islandica 生长增量的年代学分析，生成了缅因湾过去 1000 年的年度解析温度记录。 PI 探索了 NAO 模态、NAO 极值、海水温度、贝壳生长速率和化学之间的具体关系，以及缅因湾海洋气候系统对过去千年快速气候变化的响应。这项研究的结果揭示了该地区气候变化将影响 21 世纪的大量人口。研究生和本科生正在参与这项研究，PI 正在与各个地区研究中心合作，通过互动展示来突出该研究。