Collaborative Research: Quantifying microbial controls on the annual cycle of methane and oxygen within the ultraoligotrophic Central Arctic during MOSAiC

合作研究：量化 MOSAiC 期间微生物对北极中部超贫营养甲烷和氧气年度循环的控制

• 批准号: 1821900
• 负责人: Brice Loose
• 金额: $ 54.14万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1821900&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantifying; microbial; controls

The central Arctic Ocean is changing rapidly as multiyear sea ice gives way to a new seasonal sea ice regime, and these regional shifts have important implications for global climate as well as the entire Arctic system. As part of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC), the investigators will use a research vessel frozen into polar ice as a sampling platform to focus on the influence of sea ice on the uptake and release of oxygen and methane across a full annual cycle. Combined with other observations made by MOSAiC collaborators, these data will allow the investigators to build a detailed conceptual model of carbon and energy flow across seasons and improve numerical models explaining the behavior of the broader Arctic system. In addition, they will use genomic techniques to gain a new understanding of microbial dynamcis and diversity in this understudied region. The broader impacts of this work include support for early-career scientists, significant international collaboration as part of the MOSAiC program, and training for postdoctoral scientists and undergraduate students. Public outreach will include viewings of the Northwest Polar Passage documentary Frozen Obsession in San Diego, CA, and Providence, RI, followed by panel discussions on polar exploration, ecology, and change. The goal of this project is to identify the biological and physical drivers underlying the production and uptake of oxygen and methane, establishing the metabolic balance of these key gases in the oligotrophic Central Arctic. The investigators will take advantage of the unique opportunity afforded by the international, year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition to determine net community production from year-round measurements of oxygen and argon, as well as methane oxidation and production from methane concentration and isotopic ratios. They will measure bacterial and community respiration, bacterial production, and microbial community structure, and analyze gene expression to identify the genes, organisms, and pathways associated with methane production in the surface ocean. Results will be used to model the oceanic methane cycle using the MITgcm Arctic Regional Model and improve the biogeochemical components of the Regional Arctic System Model (RASM).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.

随着多年海冰让位于新的季节性海冰状况，北冰洋中部正在迅速变化，这些区域变化对全球气候以及整个北极系统具有重要影响。作为北极气候研究多学科漂流观测站（MOSAiC）的一部分，研究人员将使用一艘冻结在极地冰中的科考船作为采样平台，重点研究海冰对北极地区氧气和甲烷吸收和释放的影响。一个完整的年度周期。结合 MOSAiC 合作者的其他观察结果，这些数据将使研究人员能够建立跨季节碳和能量流的详细概念模型，并改进解释更广泛的北极系统行为的数值模型。此外，他们将利用基因组技术来对这个待研究区域的微生物动态和多样性有新的了解。这项工作的更广泛影响包括对早期职业科学家的支持、MOSAiC 计划一部分的重要国际合作以及对博士后科学家和本科生的培训。公众宣传活动将包括在加利福尼亚州圣地亚哥和罗德岛州普罗维登斯观看西北极地航道纪录片《冰冻的痴迷》，然后进行有关极地探索、生态和变化的小组讨论。 该项目的目标是确定氧气和甲烷产生和吸收的生物和物理驱动因素，在贫营养的北极中部建立这些关键气体的代谢平衡。研究人员将利用为期一年的国际北极气候研究多学科漂流观测站（MOSAiC）探险提供的独特机会，通过全年测量氧气和氩气以及甲烷氧化来确定群落净产量以及甲烷浓度和同位素比的产量。他们将测量细菌和群落呼吸、细菌产生和微生物群落结构，并分析基因表达，以确定与表层海洋甲烷产生相关的基因、生物体和途径。结果将用于使用 MITgcm 北极区域模型来模拟海洋甲烷循环，并改进区域北极系统模型 (RASM) 的生物地球化学成分。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力评估进行评估，被认为值得支持。优点和更广泛的影响审查标准。

项目成果

Overview of the MOSAiC expedition: Physical oceanography

MOSAiC 探险概述：物理海洋学

• DOI: 10.1525/elementa.2021.00062
• 发表时间: 2022-01
• 期刊: Elementa: Science of the Anthropocene
• 作者: Rabe, Benjamin;Heuzé, Céline;Regnery, Julia;Aksenov, Yevgeny;Allerholt, Jacob;Athanase, Marylou;Bai, Youcheng;Basque, Chris;Bauch, Dorothea;Baumann, Till M.;et al
• 通讯作者: et al

Thin and transient meltwater layers and false bottoms in the Arctic sea ice pack—Recent insights on these historically overlooked features

北极海冰群中薄而短暂的融水层和假底部——对这些历史上被忽视的特征的最新见解

• DOI: 10.1525/elementa.2023.00025
• 发表时间: 2023-01
• 期刊: Elem Sci Anth
• 作者: Smith, Madison M.;Angot, Hélène;Chamberlain, Emelia J.;Droste, Elise S.;Karam, Salar;Muilwijk, Morven;Webb, Alison L.;Archer, Stephen D.;Beck, Ivo;Blomquist, Byron W.;et al
• 通讯作者: et al

Overview of the MOSAiC expedition—Atmosphere

MOSAiC 探险队概况 – 气氛

• DOI: 10.1525/elementa.2021.00060
• 发表时间: 2022-01
• 期刊: Elementa: Science of the Anthropocene
• 作者: Shupe, Matthew D.;Rex, Markus;Blomquist, Byron;Persson, P. Ola;Schmale, Julia;Uttal, Taneil;Althausen, Dietrich;Angot, Hélène;Archer, Stephen;Bariteau, Ludovic;et al
• 通讯作者: et al

Microplastics Distribution within Western Arctic Seawater and Sea Ice

北极西部海水和海冰内的微塑料分布

• DOI: 10.3390/toxics11090792
• 发表时间: 2023-09-20
• 期刊: Toxics
• 影响因子: 4.6
• 作者: D'Angelo A;Trenholm N;Loose B;Glastra L;Strock J;Kim J
• 通讯作者: Kim J