Collaborative Research: Millennial-Length Histories of Northeastern Pacific Climate Variability from Bivalve Mollusks and Trees

该项目的总体目标是利用包括海洋双壳类太平洋象拔蚌生长增量在内的古气候代用指标的组合数据，产生一个连续的、每年分辨的、长达千年的东北太平洋地区海洋气候历史（Panopea generosa），树木年轮年表，和热带珊瑚的生长该地区的气候变率在北美西部的社会经济和环境动态中起着重要作用对渔业生产、森林生长、野火、干旱和积雪有明确的影响。在过去十年中，该区域经历了反复的极端热浪，深刻影响了海洋生态系统和邻近的陆地系统。 本研究的主要目的是重建东北太平洋海表温度作为地球气候系统中重要的气候和气候变率的强迫机制，但它受仪器观测、古气候资料、和大气环流模式。 该项目旨在解决有关早期树木年轮重建之间的一致性差以及海洋和陆地系统之间的时变联系的可能性的遗留问题。 此外，还将通过综合珊瑚记录和现有的厄尔尼诺南方涛动重建来评估热带外和热带太平洋区域之间的长期关系。 东北太平洋古气候重建可能会产生独特的基准之间的比较古气候记录，现代观测和模型数据集的半球气候从年际到百年的时间尺度。潜在的更广泛影响（B.I.）包括开发一个潜在的高影响气候代理，支持一名博士生，为本科生开发一个基于树木年代学课程的本科生研究经验（CURE），在树木年轮研究部门的大厅和生物圈2中安装展品，培训讲师，该奖项反映了NSF的法定使命，并被认为值得支持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。

The general goal of this project is to produce a continuous, annually resolved, and millennial-length marine climate history of the northeast Pacific Ocean region using a combination of data from paleoclimate proxies involving growth increments of the marine bivalve Pacific geoduck (Panopea generosa), tree-ring chronologies, and tropical coral growth-increment records.Climate variability in the region plays a fundamental role in the socioeconomic and environmental dynamics of western North America with clearly established implications for fisheries production, forest growth, wildfire, drought, and snowpack. Over the past decade, the region has experienced repeated and extreme heatwaves that profoundly impacted marine ecosystems and adjacent terrestrial systems. Yet, considerable uncertainty exists as to northeastern Pacific climate variability prior to the 1900s and the extent to which current climate is atypical.Foremost, this research aims to reconstruct northeast Pacific Ocean sea-surface temperatures as a significant forcing mechanism of climate and climate variability in Earth’s climate system but which is relatively poorly constrained by instrumental observations, paleoclimate data, and general climate circulation models. This project seeks to address lingering questions regarding poor agreement among earlier tree-ring reconstructions and the possibility of time variant linkages across marine and terrestrial systems. Moreover, long-term relationships between the extratropical and tropical Pacific region will be assessed by integrating coral records and existing reconstructions of the El Niño Southern Oscillation. Northeastern Pacific paleoclimate reconstructions may yield unique benchmarks for comparison among paleoclimate records, modern observations, and model datasets of hemispheric climate from interannual to centennial timescales. The potential Broader Impacts (B.I.) include development of a potential high-impact climate proxy, support for a doctoral student, development of a dendrochronology course-based undergraduate research experiences (CURE) for undergraduate students, installation of exhibits into the lobbies of the tree-ring-research dept and in Biosphere2, training of docents, and building a Youtube channel of videos regarding quantitative paleoclimate techniques.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.