New capabilities for measuring organic matter degradation in the deepest oceans on Earth

测量地球最深海洋有机物降解的新功能

• 批准号: NE/V008870/1
• 负责人: Anna Lichtschlag
• 金额: $ 12.2万
• 依托单位: NATIONAL OCEANOGRAPHY CENTRE
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FV008870%2F1
• 关键词: New; capabilities; measuring; organic; matter

The hadal zone, with depths of 6000-11000 m, accounts for nearly half of the ocean's depth range, but has only recently been recognized as potential hotspot for organic carbon turnover and microbial activity. To understand the carbon mineralization and the related biogeochemical processes in hadal sediments is of global importance as carbon recycling in sediments can have critical implications for ocean chemistry, redox conditions, nutrient availability and hence for life in the oceans and on land. Due to inherent difficulties of retrieving samples for later analyses from hadal depths, a key element to make step changes in this field of research is the ability to use sensor technology to measure the important biogeochemical parameters directly in the hadal sediments and water column, i.e. without retrieving samples. The National Oceanography Centre (NOC) are world-leaders in developing autonomous miniaturized chemical sensors for use in the open ocean. Their existing technology has been tested to 6000 m depth and can measure a wide range of chemicals in environments from the polar regions to the tropics. This project will bring together NOC experts with researchers from the newly created centre of excellence for ultra-deep sea research: the Danish Center for Hadal Research (HADAL) at the University of Southern Denmark (SDU) to jointly improve our knowledge about the processes governing organic carbon degradation in deep-sea trenches. In order to achieve this, we will share resources with the HADAL Center participants, to: i) conduct a knowledge exchange and a collaborative design workshop with both partners to decide on required sensor adaptations ii) test the sensors at the HADAL pressure testing facility to depths > 6000 m to study their limitations and required improvements, and iii) develop the first proof of concept data set of nutrients measured directly in hadal sediments during joint field work to a deep-sea trench off Japan. The outcomes of this project will answer exciting research questions about organic carbon degradation processes in deep-sea trenches and their impact on the surrounding ecosystem and will provide a proof-of-concept data set that will position us to strengthen the collaboration by writing joint proposals for future collaborations.

深度为6000-11000 m的Hadal区占海洋深度范围的几乎一半，但直到最近才被认为是有机碳更换和微生物活性的潜在热点。要了解碳矿化和哈达尔沉积物中相关的生物地球化学过程至关重要，因为沉积物中的碳回收可能对海洋化学，氧化还原条件，养分可用性以及对海洋和陆地上的寿命产生关键的影响。由于检索样品以供以后从哈达尔深度进行分析的固有困难，因此在此研究领域进行步骤更改的关键要素是使用传感器技术直接在Hadal沉积物和水柱中直接测量重要的生物地球化学参数，即无需检索样品。国家海洋学中心（NOC）是世界领导者开发自动微型化学传感器，可在开阔的海洋中使用。他们的现有技术已测试到6000 m的深度，可以在极地地区到热带地区的环境中测量各种化学物质。该项目将与新成立的超深海卓越中心研究中心的研究人员聚集在一起：丹麦南部丹麦大学（SDU）（SDU）的丹麦哈达尔研究中心（HADAL），共同提高了我们对统治深度沟槽中有机碳降解过程的知识。 In order to achieve this, we will share resources with the HADAL Center participants, to: i) conduct a knowledge exchange and a collaborative design workshop with both partners to decide on required sensor adaptations ii) test the sensors at the HADAL pressure testing facility to depths > 6000 m to study their limitations and required improvements, and iii) develop the first proof of concept data set of nutrients measured directly in hadal sediments during joint field work to a deep-sea trench off 日本。该项目的结果将回答有关深海战es中有机碳降解过程及其对周围生态系统的影响的令人兴奋的研究问题，并将提供概念验证数据集，该数据集将我们通过为未来的合作编写共同的建议来加强我们的协作。