惯性引起的副热带环流系中漂浮物的积累
Inertia-induced accumulation of flotsam in the subtropical gyres
摘要：
最近对海洋塑料碎片密度的调查显示，副热带环流系中心的塑料碎片密度很高。早期的研究认为，大垃圾斑块的形成是由于这些地区的埃克曼收敛。在这项工作中，我们报告了一个趋势，到目前为止被忽视的drogued和undrogued漂流物积累明显的副热带环流系，与undrogued漂流物积累在同一地区的塑料碎片积累。我们发现，观测到的积累是太快的Ekman收敛来解释它。我们证明，积累是由有限的大小和浮力（即，惯性）对无阻尼漂流物在海流和风阻力下运动的影响。我们推断，漂流物的运动一般受到类似的影响。这是通过使用一个新提出的马克西-莱利方程模型的淹没（浮出水面）漂流部分作为一个球体的部分体积是淹没（浮出水面）。
英文摘要：
Recent surveys of marine plastic debris density have revealed high levels in the center of the subtropical gyres. Earlier studies have argued that the formation of great garbage patches is due to Ekman convergence in such regions. In this work we report a tendency so far overlooked of drogued and undrogued drifters to accumulate distinctly over the subtropical gyres, with undrogued drifters accumulating in the same areas where plastic debris accumulate. We show that the observed accumulation is too fast for Ekman convergence to explain it. We demonstrate that the accumulation is controlled by finite-size and buoyancy (i.e., inertial) effects on undrogued drifter motion subjected to ocean current and wind drags. We infer that the motion of flotsam in general is constrained by similar effects. This is done by using a newly proposed Maxey--Riley equation which models the submerged (surfaced) drifter portion as a sphere of the fractional volume that is submerged (surfaced).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
