Planktonic communities and chaotic advection in dynamical models of Langmuir circulation
Planktonic communities and chaotic advection in dynamical models of Langmuir circulation
复制标题
朗缪尔环流动力学模型中的浮游群落和混沌平流
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Bees
中科院分区：
文献类型：
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作者：
M. Bees
提出并研究了一种典型中尺度海洋结构中浮游生物斑块产生的确定性机制。通过对一个简单的朗缪尔环流模式的直接数值模拟，我们量化了非恒定流对浮游生物群落的影响，并论证了它们的重要性。在水流中发现了两个性质不同的区域：有助于浮游生物传播的混乱区域和局部连贯的区域，这些区域不与混乱区域混合，并持续很长一段时间。考虑到浮游生物浮力的变化，研究了这些区域对浮游植物和浮游动物的相对重要性。特别是，物种特定的保留区结构与环境强迫的变化有关。
A deterministic mechanism for the production of plankton patches within a typical medium scale oceanic structure is proposed and investigated. By direct numerical simulation of a simple model of Langmuir circulation we quantify the effects of unsteady flows on planktonic communities and demonstrate their importance. Two qualitatively different zones within the flow are identified: chaotic regions that help to spread plankton and locally coherent regions, that do not mix with the chaotic regions and which persist for long periods of time. The relative importance of these regions to both phytoplankton and zooplankton is investigated, taking into account variations in plankton buoyancy. In particular, species-specific retention zone structure is discussed in relation to variations in environmental forcing.