Mediterranean Institute for Advanced Studies (IMEDEA, UIB-CSIC), Mallorca, Spain.
Spanish Oceanographic Institute - Balearic Oceanographic Centre (IEO-COB), Mallorca, Spain.
Mar Pollut Bull. 2020 Jun;155:111159. doi: 10.1016/j.marpolbul.2020.111159. Epub 2020 Apr 27.
The 3D dispersion of marine litter (ML) over the Mediterranean basin has been simulated using the velocity fields from a high resolution circulation model as base to run a 3D Lagrangian model. Three simulations have been performed to mimic the evolution of ML with density lower, similar, or higher than seawater. In all cases a realistic distribution of ML sources was used. Our results show that the accumulation/dispersion areas of the floating and buoyancy neutral particles are practically the same, although the latter are distributed in the water column, 80% of them found in the photic layer (average depth of 35m). Regarding to the densest particles, they rapidly sink and reach the seafloor close to their source. The regions of higher temporal variability mostly coincide with the ML accumulation regions. Weak seasonal variability occurs at a sub-basin scale as a result of the particles redistribution induced by the seasonal variability of the current field.
使用高分辨率环流模型的速度场模拟了地中海盆地海洋垃圾（ML）的三维分布，以便运行三维拉格朗日模型。进行了三次模拟，以模拟密度低于、等于或高于海水的 ML 的演变。在所有情况下，都使用了现实的 ML 源分布。我们的结果表明，漂浮和浮力中性粒子的积累/扩散区域实际上是相同的，尽管后者分布在水柱中，其中 80%存在于光层（平均深度 35m）中。对于最密集的颗粒，它们迅速下沉并接近其源的海底。时间变化较大的区域主要与 ML 积累区域重合。由于流场季节性变化引起的颗粒再分配，亚盆地尺度上出现较弱的季节性变化。
