Königshafen Submarine Groundwater Discharge Network (KiSNet)

国王港海底地下水排放网络 (KiSNet)

• 批准号: 437385420
• 负责人: Dr. Ulf Mallast
• 金额: --
• 依托单位: Abteilung Biogeochemie / Geologie
• 依托单位国家: 德国
• 项目类别: Scientific Networks
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/437385420?language=en
• 关键词: nigshafen; Submarine; Groundwater; Discharge; Network

Submarine groundwater discharge (SGD) as a pathway for water and chemical constituents between land and ocean is a rather young topic, but its influence on nutrient cycles on a global scale, is likely to be as significant as the input from rivers. Yet, despite the importance, so far reported SGD flux data contain large uncertainties, either because they were up-scaled from local point measurements to regional scales or because they were derived from modelling/ budgeting of regional or even global matter fluxes. These uncertainties stem from three aspects: 1) methods to retrieve fluxes differ without knowing how each method and flux results relate to each. In turn, an SGD flux comparison across methods is rarely possible. 2) SGD flux measurements are point measurements conducted over short periods of time. In turn, existing spatiotemporal SGD variability is neglected resulting in not generally representative flux measurement, 3) SGD investigations are mostly disciplinary (either marine or terrestrial) although further methods from other disciplines exist. If investigations are interdisciplinary, inherited method-related uncertainties would be reduced which is utterly needed against the background of global change, which particularly affects coastal regions. The proposed network aims to provide the needed platform for an interdisciplinary group of SGD experts to initiate and intensify collaborative ties across disciplines. It also seeks for an improvement of individual methodologies using an interdisciplinary groundtruthing and thus intercomparison between methods of terrestrial and marine disciplines. Finally, the network will create an interdisciplinary method catalogue which outlines optimal combinations for qualitative an quantitative SGD investigations that will be the basis for future SGD research.To reach these aims, the network will be established around regular meetings of which four are face-to-face meetings. The first and last meetings are a kick-off and result meeting respectively. The second and third meeting serve for an intercomparison experiment at the intertidal bay of Königshafen, Sylt. During the experiment the interdisciplinary network of SGD experts will apply several quantitative and qualitative methods from the terrestrial and marine disciplines at the same site and at the same time for the first time. As a result, this course of action will bring together young and experienced scientists from all SGD-relevant marine and terrestrial disciplines, but it will also help to broaden SGD knowledge for all network members, and it will confront the next generation of SGD researchers with an interdisciplinary view of SGD. Second, the method intercomparison experiment will create data sets that are unique in their interdisciplinary nature. The datasets will be published in international peer-reviewed and open-access journals and we plan to produce a detailed, open-access SGD method catalogue analogous to the GEOTRACES CookBook.

海底地下水排放（SGD）作为陆地和海洋之间的水和化学成分的通道是一个相当年轻的话题，但它对全球范围内营养循环的影响可能与河流输入一样重要。然而，尽管重要性，到目前为止，报告的SGD通量数据包含很大的不确定性，因为它们是从局部点测量到区域尺度的，或者因为它们来自区域甚至全球物质通量的建模/预算。这些不确定性源于三个方面：1）反演通量的方法不同，而不知道每种方法和通量结果如何相互关联。反过来，不同方法之间的SGD通量比较几乎不可能。2)SGD通量测量是在短时间内进行的点测量。反过来，现有的时空SGD变化被忽略，导致一般不具有代表性的通量测量，3）SGD调查主要是学科（海洋或陆地），虽然其他学科的进一步方法存在。如果调查是跨学科的，与方法有关的固有不确定性就会减少，这在全球变化的背景下是完全必要的，特别是影响到沿海地区。拟议的网络旨在为SGD专家的跨学科小组提供所需的平台，以启动和加强跨学科的合作关系。它还寻求利用跨学科的实地调查改进个别方法，从而在陆地和海洋学科的方法之间进行相互比较。最后，该网络将创建一个跨学科的方法目录，概述定性和定量SGD研究的最佳组合，这将是未来SGD研究的基础。为了实现这些目标，该网络将围绕定期会议建立，其中四个是面对面会议。第一次会议和最后一次会议分别是启动会议和结果会议。第二次和第三次会议将在叙尔特岛国王港的潮间带进行一次相互比较实验。在实验期间，SGD专家的跨学科网络将首次在同一地点同时应用陆地和海洋学科的几种定量和定性方法。因此，这一行动方针将汇集来自所有SGD相关海洋和陆地学科的年轻和经验丰富的科学家，但它也将有助于扩大所有网络成员的SGD知识，并将使下一代SGD研究人员面临SGD的跨学科观点。其次，方法相互比较实验将创建具有跨学科性质的独特数据集。这些数据集将发表在国际同行评审和开放获取的期刊上，我们计划制作一个详细的，开放获取的SGD方法目录，类似于GEOTRACES CookBook。