Modeling the Secondary Circulation in Stratified Estuaries

[906787]在本项目中，pi将研究分层河口的二次环流机制，并量化其对垂直动量和盐运移和水平分散的贡献。在分层的哈德逊河河口观测表明，复杂的二次流强烈影响横向密度结构，可能是垂直动量通量的主要贡献者。已知次级环流对河口的横向交换和纵向分散具有主要影响，但只在混合良好的环境中进行了研究。一个三维数值模型将用于理想化和现实模拟，前者侧重于隔离特定机制，后者适用于哈德逊河口下游，其中有大量数据可用。

9906787GeyerIn this project, the PIs will investigate the mechanisms of secondary circulation in stratified esturaries, and quantify their contributions to vertical momentum and salt transport and horizontal dispersion. Observations in the stratified Hudson River estuary indicate complex secondary flows that strongly influence the transverse density structure and may be major contributors to vertical momentum flux. Secondary circulations, known to have a dominant influence on lateral exchange and longitudinal dispersion in estuaries, have only been studied in well-mixed environments. A three-dimensional, numerical model will be used for both idealized and realistic simulations, the former focused on isolating particular mechanisms, and the latter applied to the lower Hudson estuary, for which a large array of data is available.