SGER: Science-of-opportunity aboard Icebreaker Oden - Antarctic bacterial remineralization

SGER：破冰船 Oden 上的机会科学 - 南极细菌再矿化

• 批准号: 0741409
• 负责人: Patricia Yager
• 金额: $ 8.01万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-10-01 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0741409&HistoricalAwards=false
• 关键词: SGER; Science; opportunity; aboard; Icebreaker

AbstractGlobal climate change in the past few decades has been anomalously swift in polar regions, and the effects on Southern Ocean physics, ecological structure, and biogeochemistry are likely to accelerate in the near future. This proposal focuses on the remineralization of particulate organic matter in the water column of the Ross Sea and Amundsen Sea, and takes advantage of a platform of opportunity, the transit of the Icebreaker Oden from Punta Arenas, through the Amundsen Sea and Ross Sea, to McMurdo Station. Particulate organic matter is the primary vector for carbon export in the Antarctic. The rate and composition of particulate primary production likely depend on environmental conditions (e.g. light, temperature, macro- or micro-nutrient supply, carbon dioxide) during a bloom. We will determine how the pelagic bacterial response to particles is related to particle production and composition. We are particularly interested in how the bacterial response influences the shape of the remineralization profile (or "Martin curve") and affects the efficiency of the biological pump. Ultimately, we are interested in whether conditions associated with climate change will alter the efficiency of the biological pump and therefore carbon export. The project will support graduate and undergraduate education, especially for underrepresented groups. We will also develop new international collaborations and infrastructure though our work with Swedish scientists and students and US and Swedish educators. Our results will be made widely available through research publications and databases, and through public outreach efforts.

摘要 过去几十年来，全球气候变化在极地地区异常迅速，对南大洋物理、生态结构和生物地球化学的影响在不久的将来可能会加速。 该提案的重点是罗斯海和阿蒙森海水体中颗粒有机物的再矿化，并利用破冰船奥登号从蓬塔阿雷纳斯出发，穿过阿蒙森海和罗斯海的机会平台，麦克默多站。 颗粒有机物是南极碳输出的主要载体。颗粒初级生产的速率和组成可能取决于开花期间的环境条件（例如光、温度、大量或微量养分供应、二氧化碳）。我们将确定远洋细菌对颗粒的反应与颗粒产生和成分的关系。我们特别感兴趣的是细菌反应如何影响再矿化曲线的形状（或“马丁曲线”）并影响生物泵的效率。最终，我们感兴趣的是与气候变化相关的条件是否会改变生物泵的效率，从而改变碳输出。该项目将支持研究生和本科生教育，特别是针对代表性不足的群体。我们还将通过与瑞典科学家和学生以及美国和瑞典教育工作者的合作，开发新的国际合作和基础设施。我们的研究结果将通过研究出版物和数据库以及公共宣传工作广泛传播。