Marine Connectivity in a Large Inverse Estuary
Marine Connectivity in a Large Inverse Estuary
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大型逆河口的海洋连通性
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Paul Malthouse
中科院分区：
文献类型：
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作者：
J. Kämpf;N. Payne;Paul Malthouse
摘要通过加入数千个被动虚拟粒子，采用一个经过良好校准的水动力学模型，在几个月到几年的时间尺度上探索了南澳斯宾塞湾（Spencer Gulf）的海洋连通性。基于一种新的方法的“累积冲洗时间”，研究结果表明，斯宾塞湾由两个不同的制度。下斯宾塞湾是平流冲洗每年冬季季节性的基础上。与此相反，上斯宾塞湾是由扩散，而不是平流过程和经验冲洗更长的时间尺度（200-400天）。上斯宾塞湾的物理独特性可能解释了为什么这个地区容纳了世界上已知最大的巨型乌贼产卵聚集。使用一种简单的方法来模拟该物种的底栖行为，我们能够重现一些观察到的迁移特征，但该模型未能预测乌贼返回其产卵地，这仍然是未来研究的一个难题。
Abstract With the addition of several thousand passive virtual particles, a well calibrated hydrodynamic model is employed to explore marine connectivity in Spencer Gulf, South Australia, which is a large inverse estuary, on time scales of months to years. Based on a new method of “cumulative flushing time,” findings reveal that Spencer Gulf consists of two distinct regimes. Lower Spencer Gulf is advectively flushed every winter on a seasonal basis. In contrast to this, Upper Spencer Gulf is dominated by diffusive rather than advective processes and experiences flushing over much longer time scales (200–400 days). The physical uniqueness of Upper Spencer Gulf might explain why this region accommodates the largest known giant cuttlefish spawning aggregation in the world. Using a simple approach to mimic the bottom-dwelling behaviour of this species, we were able to reproduce some observed migratory features, but the model fails to predict the return of cuttlefish to their spawning grounds, which remains a puzzle for future studies.