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: 1821911
• 负责人: Jeff Bowman
• 金额: $ 61.86万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 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=1821911&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制度，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都有重要影响。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研究船作为采样平台，重点研究海冰在整个年度周期中对氧气和甲烷的吸收和释放的影响。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动的详细概念模型，并改进解释更广泛的北极系统行为的数值模型。此外，他们还将利用基因组技术对这一未充分研究的地区的微生物动力学和多样性有新的认识。这项工作的更广泛的影响包括支持早期职业科学家，作为MOSAiC计划的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。公众宣传将包括观看西北极地通道纪录片冻结痴迷在圣地亚哥，加利福尼亚州，和普罗维登斯，RI，其次是极地探险，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，建立贫营养北极中部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多学科漂流观测站北极气候研究（MOSAiC）考察提供的独特机会，通过全年测量氧气和氩气，以及甲烷氧化和甲烷浓度和同位素比率的生产来确定净社区生产。他们将测量细菌和群落呼吸，细菌生产和微生物群落结构，并分析基因表达，以确定与海洋表面甲烷生产相关的基因，生物和途径。研究结果将用于使用MITgcm北极区域模型模拟海洋甲烷循环，并改进区域北极系统模型（RASM）的地球化学成分。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Methane In-Situ and In-Vitro Data in Seawater, Sea Ice, and Meltwater from the Multidisciplinary Drifting Observatory for the Study of Arctic Climate (MOSAiC), October 2019 - October 2020

北极气候研究多学科漂流观测站 (MOSAiC) 海水、海冰和融水中的甲烷原位和体外数据，2019 年 10 月 - 2020 年 10 月

• DOI: 10.18739/a2348gh8w
• 发表时间: 2020
• 期刊: NSF Arctic Data Center
• 作者: D'Angelo, Alessandra;Chamberlain, Emelia J.;Creamean, Jessie;Bowman, Jeff;Loose, Brice
• 通讯作者: Loose, Brice

Temporal evolution of under-ice meltwater layers and false bottoms and their impact on summer Arctic sea ice mass balance

• DOI: 10.1525/elementa.2022.00035
• 发表时间: 2023
• 期刊: Elementa: Science of the Anthropocene
• 作者: E. Salganik;C. Katlein;B. Lange;I. Matero;R. Lei;A. Fong;S. Fons;D. Divine;M. Oggier;G. Castellani;Deborah Bozzato;E. J. Chamberlain;C. Hoppe;O. Müller;J. Gardner;A. Rinke;P. Pereira;Adam Ulfsbo;C. Marsay;M. Webster;S. Maus;K. Høyland;M. Granskog

Meltwater layer dynamics in a central Arctic lead: Effects of lead width, re-freezing, and mixing during late summer

北极中部铅线的融水层动态：夏末铅线宽度、再冻结和混合的影响

• DOI: 10.1525/elementa.2022.00102
• 发表时间: 2023
• 期刊: Elem Sci Anth
• 作者: Nomura, Daiki;Kawaguchi, Yusuke;Webb, Alison L.;Li, Yuhong;Dall’osto, Manuel;Schmidt, Katrin;Droste, Elise S.;Chamberlain, Emelia J.;Kolabutin, Nikolai;Shimanchuk, Egor
• 通讯作者: Shimanchuk, Egor

Oxygen incubations for whole seawater respiration rates during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC), 2019-2020

北极气候研究多学科漂流观测站（MOSAiC）期间全海水呼吸速率的氧气孵化，2019-2020

• DOI: 10.18739/a26w96b1v
• 发表时间: 2022
• 期刊: NSF Arctic Data Center
• 作者: Chamberlain, Emelia;Creamean, Jessie;Bowman, Jeff
• 通讯作者: Bowman, Jeff

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

• DOI: 10.1525/elementa.2023.00025
• 发表时间: 2023
• 期刊: Elem Sci Anth
• 作者: Madison M. Smith;H. Angot;E. J. Chamberlain;E. Droste;S. Karam;Morven Muilwijk;Alison L. Webb;Stephen D. Archer;Ivo Beck;Byron W. Blomquist;Jeffrey D. Bowman;M. Boyer;Deborah Bozzato;M. Chierici;J. Creamean;Alessandra D'Angelo;B. Delille;I. Fer;A. Fong;A. Fransson;Niels Fuchs;Jessie Gardner;M. Granskog;C. Hoppe;M. Hoppema;M. Hoppmann;Thomas Mock;Sofia Muller;Oliver Müller;M. Nicolaus;Daiki Nomura;T. Petäjä;E. Salganik;J. Schmale;Katrin Schmidt;K. Schulz;M. Shupe;J. Stefels;Linda Thielke;Sandra Tippenhauer;Adam Ulfsbo;M. V. van Leeuwe;M. Webster;Masaki Yoshimura;Liyang Zhan