Exploring the role of estuarine circulation for transport of suspended particulate matter (SPM) in the Wadden Sea by means of field observations and numerical modelling. Acronym: ECOWS

通过现场观测和数值模拟探索河口环流对瓦登海悬浮颗粒物 (SPM) 输送的作用。

• 批准号: 166387159
• 负责人: Professor Dr. Hans Burchard
• 金额: --
• 依托单位: Leibniz-Institut für Ostseeforschung Warnemünde (IOW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/166387159?language=en
• 关键词: Exploring; role; estuarine; circulation; transport

It is the aim of this project to investigate the role of estuarine circulation for suspended particulate matter (SPM) transport in the Wadden Sea. Major hypotheses are that (i) estuarine circulation is relevant to SPM transports in the Wadden Sea, that (ii) tidal straining (i.e. the correlation between vertical shear and eddy viscosity due to tidal asymmetry caused by horizontal density gradients) is the major process contributing to estuarine circulation, and (iii) that wind straining (i.e. the subtidal vertical shear generated by surface wind stress) is an important episodic contribution to estuarine circulation. These hypotheses will be tested by means of targeted field observations in three tidal channels (Hörnum Deep, Jade Bay and Otzumer Balje), idealised process-oriented numerical model simulations and realistic hindcast simulations for the focal areas and for the entire Wadden Sea. Confirmation of these hypotheses will lead to a paradigm shift in understanding Wadden Sea dynamics which so far has been widely assumed to be unaffected by density gradients.

本项目的目的是研究河口环流对瓦登海悬浮颗粒物(SPM)输送的作用。主要假设是：(I)河口环流与河口海域的SPM输送有关，(Ii)潮汐应变(即由水平密度梯度引起的潮汐不对称引起的垂直切变和涡动粘度之间的相关性)是河口环流的主要过程，以及(Iii)风应变(即由表面风应力产生的潮下垂直切变)是河口环流的重要阶段性贡献。这些假设将通过三个潮汐航道(Hörnum Deep、Jade Bay和Otzumer Balje)的有针对性的现场观测、理想化的以过程为导向的数值模式模拟和对震源区和整个瓦登海的现实后播模拟来检验。这些假设的确认将导致对瓦登海动力学的理解发生范式转变，迄今为止，人们普遍认为瓦登海动力学不受密度梯度的影响。