Collaborative Research: Natural and Anthropogenic Controls on the Inorganic Carbon Dynamics in the Chukchi Sea

合作研究：自然和人为对楚科奇海无机碳动态的控制

基本信息

批准号：
1602654
负责人：
Scott Doney
金额：
$ 36.45万
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：
2016
资助国家：
美国
起止时间：
2016-08-01 至 2020-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1602654&HistoricalAwards=false
关键词：
Collaborative Research Natural Anthropogenic Controls

项目摘要

As a result of increasing atmospheric carbon dioxide concentrations, the cold waters of the Arctic Ocean and its peripheral seas absorb more and more carbon dioxide from the atmosphere. This process, called ocean acidification, decreases the pH and consumes carbonate ions. Ocean acidification is further enhanced as the Arctic Ocean?s sea ice cover is reduced over longer periods of time each year. The fast chemical changes of the waters are detrimental to many marine organisms. In particular, it makes it more difficult for calcifying organisms to build their calcium carbonate shells or skeletons. Since many of the calcifying organisms exist at the base of the food chain, there are potentially important, but poorly understood, consequences for the marine ecosystem. This project will utilize and improve a numerical model of the physical circulation and biogeochemistry of the Chukchi Sea, a shallow sea peripheral to the Arctic Ocean, to study carbon dynamics and ocean acidification throughout the annual cycle.This project will contribute to STEM workforce development through the provision of support to two early-career scientists during their formative years. It will also provide support for the training of a graduate student. Outreach to a local K-12 Aleut community will be enabled by participation in classroom activities during the annual "Bering Sea Days" on St. Paul Island. The resulting model results will be a resource for related studies of the marine carbon cycle in the Arctic, such as the international Distributed Biological Observatory (DBO) program and the Arctic Marine Biodiversity Observing Network (AMBON).Little is known about the carbon dynamics of the Chukchi Sea in fall, winter and spring due to limited spatial and temporal data coverage in this remote and often inaccessible area. This project will utilize moderately high-resolution three-dimensional ocean and ice circulation regional physical-biogeochemical numerical model (ROMS + COBALT) integrations to study Chukchi Sea carbon dynamics and ocean acidification throughout the year. Hindcasts (1979-present) will be forced by meteorological reanalysis products and will account for lateral transport from the Bering Sea and central Arctic as well as input of organic and inorganic carbon from rivers and sea-ice melt water. Specific project tasks will include: data-based evaluation of the simulated ocean biogeochemistry system fields; characterization of the patterns of carbon dioxide system variability for the Chukchi Sea across time-scales; partition of the underlying physical and biological mechanisms; quantification of the downstream transport of organic and inorganic carbon using dye tracers and Lagrangian floats; and analysis of the sensitivity of ecosystem processes to ocean acidification.

由于大气二氧化碳浓度的增加，北极海洋及其周围海洋的冷水从大气中吸收了越来越多的二氧化碳。这个称为海洋酸化的过程可降低pH值并消耗碳酸盐离子。随着北极海洋冰盖每年较长的时间减少，海洋酸化会进一步增强。水域的快速化学变化对许多海洋生物有害。特别是，它使钙化生物更难建造其碳酸钙壳或骨骼。由于许多钙化生物存在于食物链的底部，因此对海洋生态系统的影响可能很重要，但理解却很少。该项目将利用并改善并改善Chukchi Sea物理循环和生物地球化学的数值模型，Chukchi Sea是北极海洋的浅海外围，在整个年度周期中研究碳动态和海洋酸化。此项目将有助于通过STEM劳动力发展。在两位早期科学家的成长年代提供支持。它还将为培训研究生提供支持。在圣保罗岛的年度“白令海日”期间，将通过参加课堂活动来启用与当地K-12 Aleut社区的宣传。最终的模型结果将是北极海洋碳循环的相关研究的资源，例如国际分布生物观测站（DBO）计划和北极海洋生物多样性观测网络（Ambon）。秋季，冬季和春季的chukchi海由于这个遥远且常常无法接近的空间覆盖率有限。该项目将利用适度高分辨率的三维海洋和冰循环区域物理生物地球化学数值模型（ROMS +钴）整合整体研究Chukchi Sea碳动态和海洋酸化。 Hindcasts（1979年至1979年）将受到气象再分析产品的强迫，并将解释来自白令海和中部北极中部的横向运输，以及从河流和Sea-Ice融化水中的有机和无机碳的输入。特定的项目任务将包括：基于数据的模拟海洋生物地球化学系统领域的评估；跨时标的二氧化碳系统变异性的表征；划分潜在的物理和生物学机制；使用染料示踪剂和拉格朗日浮子对有机和无机碳的下游运输进行定量；以及分析生态系统过程对海洋酸化的敏感性。