Collaborative Research: Quantifying Seasonal and Interannual Changes in Shelf-Derived Material Inputs to the Arctic Ocean: The Arctic Radium Isotope Observing Network (ARION)

合作研究：量化北冰洋陆架衍生物质输入的季节性和年际变化：北极镭同位素观测网络（ARION）

• 批准号: 2031854
• 负责人: Matthew Charette
• 金额: $ 70.51万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-01 至 2026-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2031854&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantifying; Seasonal; Interannual

Within the Arctic Circle, rapidly rising air and sea temperatures have resulted in the loss of sea ice, increased river discharge, coastal erosion, and permafrost thaw. Many of these changes are adding nutrients and carbon to the shallow seas that surround the Arctic Ocean, specifically by increasing interactions with sediments on the land or those over the continental shelf. Importantly, the resulting changes are not limited to the coastal seas: added nutrients and carbon can be transported to the central Arctic Ocean via strong surface currents. Climate-related changes in Arctic Ocean chemistry may therefore influence primary production across the Arctic, and ultimately affect the amount of nutrients reaching the North Atlantic via Arctic outflow. This project will fill an important research gap by monitoring interannual and seasonal changes in radium isotopes as proxies for chemical inputs to the Arctic Ocean that are sourced in sediments, with a focus on the transfer of elements from the shelf seas to the central Arctic.Radium isotopes are continuously produced at ocean boundaries and are soluble in seawater. Radium therefore serves as an analogue for similarly sourced shelf-derived materials, including biologically important elements such as carbon, nutrients, and trace metals. To test the hypothesis that climate change is leading to increased delivery of terrestrially-derived solutes to the Arctic Ocean, radium levels will be measured on bi-annual cruises along the Laptev and East Siberian Sea margins (to capture interannual changes) and on a first-of-its kind in situ radium isotope sampler (to capture seasonal changes). These sampling efforts will be complemented by an international network of collaborators that will contribute data to create an Arctic Radium Isotope Observing Network (ARION) that spans the Arctic Ocean and will serve the greater scientific community. The project will also partner with an artist-explorer to communicate the importance of this research to the general public through exhibitions at a local museum.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.

在北极圈内，空气和海水温度迅速上升导致海冰消失、河流流量增加、海岸侵蚀和永久冻土融化。其中许多变化正在向北冰洋周围的浅海增加营养物质和碳，特别是通过增加与陆地或大陆架沉积物的相互作用。重要的是，由此产生的变化不仅限于沿海海域：增加的营养物和碳可以通过强大的海表洋流输送到北冰洋中部。因此，北冰洋化学中与气候相关的变化可能会影响整个北极的初级生产，并最终影响通过北极流出到达北大西洋的营养物质的量。该项目将通过监测镭同位素的年际和季节变化来填补重要的研究空白，作为北冰洋沉积物中化学输入的替代指标，重点关注元素从陆架海到北极中部的转移。镭同位素在海洋边界不断产生并可溶于海水。因此，镭可以作为类似来源的陆架衍生材料的类似物，包括碳、营养物和微量金属等生物学重要元素。为了检验气候变化导致向北冰洋输送的陆地来源溶质增加的假设，将在沿着拉普捷夫和东西伯利亚海边缘的两年一次的航行中测量镭水平（以捕获年际变化），并在第一次航行中测量镭含量。同类原位镭同位素采样器（捕捉季节变化）。这些采样工作将得到国际合作者网络的补充，该网络将贡献数据以创建横跨北冰洋的北极镭同位素观测网络（ARION），并为更大的科学界服务。该项目还将与一位艺术家探险家合作，通过在当地博物馆举办展览，向公众传达这项研究的重要性。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优势和更广泛的评估进行评估，被认为值得支持。影响审查标准。

项目成果

The Arctic Radium Isotope Observing Network (ARION): Tracking Climate-​Driven Changes in Arctic Ocean Chemistry

北极镭同位素观测网络（ARION）：追踪气候驱动的北冰洋化学变化

• DOI: 10.5670/oceanog.2022.105
• 发表时间: 2022-01
• 期刊: Oceanography
• 影响因子: 2.8
• 作者: Kipp, Lauren;Charette, Matthew
• 通讯作者: Charette, Matthew