毛政,王楠,宋德海,鲍献文,仲毅

• 1:中国海洋大学海洋与大气学院
• 2:中国海洋大学物理海洋教育部重点实验室
• 3:中国海洋大学海洋地球科学学院

摘要(Abstract)：

本文以黄河口切变锋为对象，基于静止轨道海洋水色成像仪(Geostationary Ocean Color Imager, GOCI)遥感数据和水沙观测数据，建立了高精度的渤海海表悬浮体浓度(Suspended Sediment Concentration, SSC)反演公式，采用最大互相关(Maximum Cross Correlation, MCC)法和SSC梯度相结合的方法，有效识别了遥感观测的锋面时空特征；同时基于有限体积海岸海洋模型(Finite-Volume Community Ocean Model, FVCOM)建立了适用于渤海的水动力模型，将FVCOM流场数据与海表SSC相结合，研究了黄河口切变锋对悬浮体通量的影响与河口泥沙输运路径。结果表明，切变锋从黄河口往东南方向移动，历时2～3 h,消失于10 m等深线附近，内涨外落(Inner-Flood-Outer-Ebb, IFOE)型切变锋的长度较內落外涨(Inner-Ebb-Outer-Flood, IEOF)型更长，IFOE型切变锋的平均长度约为22.4km,最长能达到41km以上，而IEOF型切变锋平均长度约为16.9km; IFOE型切变锋消失的位置较IEOF型偏南。切变锋带由于具有低流速特征，能显著减小悬浮体通量，使大部分泥沙沉积在河口。切变锋处悬浮体通量不足其内侧的50%,超过50%的悬浮泥沙被切变锋阻隔在锋面内侧。切变锋使悬浮体通量提前减小，在6 m以浅海域即开始锐减。在潮流和锋面的影响下，非汛期黄河口泥沙主要往南或东南向莱州湾中部输运，再往东北输向莱州湾外，极少部分往西北和渤海中部输运。

关键词(KeyWords)： 切变锋;静止轨道海洋水色成像仪(GOCI);泥沙输运;有限体积海岸海洋模型(FVCOM);黄河口

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(U1706215,41876088);; 中央高校基本科研业务费专项(201913020)资助~~

作者(Author): 毛政,王楠,宋德海,鲍献文,仲毅

DOI: 10.16441/j.cnki.hdxb.20210093

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