Sensitivity analysis of sea scallop (Placopecten magellanicus) larvae trajectories to hydrodynamic model configuration on Georges Bank and adjacent coastal regions
Sensitivity analysis of sea scallop (Placopecten magellanicus) larvae trajectories to hydrodynamic model configuration on Georges Bank and adjacent coastal regions
复制标题
乔治滩及邻近沿海地区海扇贝 (Placopecten magellanicus) 幼虫轨迹对水动力模型配置的敏感性分析
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Michael C. Marino
中科院分区：
文献类型：
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作者：
R. Tian;Changsheng Chen;K. Stokesbury;B. Rothschild;Qichun Xu;Song Hu;G. Cowles;B. Harris;Michael C. Marino
利用高分辨率的缅因州湾/乔治海岸近岸海洋模式（GOM-FVCOM），通过面向过程的拉格朗日跟踪比较试验，对乔治海岸的早期幼虫轨迹模拟研究进行了评估。结果表明，在一个强非线性系统，如乔治银行，被动示踪剂的运动是由一个完全三维的拉格朗日流场，在空间和时间上变化，由于大的潮汐漂移和陡峭的底部地形驱动。基于流场弱非线性假设发展起来的粒子跟踪方法不适用于Georges Bank。以前的幼虫运输研究的结果驱动下构造的弱非线性假设的环流场需要谨慎解释。在目前的工作中，模型的物理设置对海扇贝幼虫的扩散和解决乔治银行和邻近的货架区域的影响进行了研究。在不同的物理条件下的模型预测的被动幼虫的空间分布的明显差异表明，一个完全非线性模型驱动的现实空间和时间变化的强迫应采用拉格朗日为基础的研究渔业种群动态乔治银行。
The previous larval-trajectory modeling studies on Georges Bank were assessed through process-oriented Lagrangian-tracking comparison experiments using the high-resolution Gulf of Maine/Georges Bank Finite-Volume Coastal Ocean Model (GOM-FVCOM). The results indicate that in a strong nonlinear system such as Georges Bank, the passive tracer movement is driven by a fully three-dimensional Lagrangian flow field that varies in space and time due to large tidal excursion and steep bottom topography. The particle-tracking methods developed based on the assumption of weak nonlinearity of the flow field are not applicable to Georges Bank. The results of previous larval transport studies driven by circulation fields constructed under the weak-nonlinearity assumption need to be interpreted with caution. In the present work, the influence of model physical setups on sea scallop larval dispersal and settlement on Georges Bank and adjacent shelf regions is examined. Distinct differences in the spatial distribution of the passive larvae predicted by the model under various physical conditions suggest that a fully nonlinear model driven by realistic spatially and temporally varying forcing should be employed for Lagrangian-based studies of fishery population dynamics on Georges Bank.