Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, Beijing, 100081, China; Marine Emergency Forecast Division, National Marine Environmental Forecasting Center, Beijing, 100081, China.
Marine Emergency Forecast Division, National Marine Environmental Forecasting Center, Beijing, 100081, China.
Mar Environ Res. 2023 Sep;190:106100. doi: 10.1016/j.marenvres.2023.106100. Epub 2023 Jul 13.
Based on the Lagrangian random walk particle tracking method and the global ocean reanalysis data, this study simulated the drift-diffusion process in ocean of microplastic particles (density less than seawater) discharged by coastal cities in China for 12 consecutive years. The results reveal that most of the microplastics (80.33%) essentially end up ashore or in the marginal seas around China, a small portion of microplastics (18.22%) enter the Sea of Japan and the Northwest Pacific Ocean via the Tsushima Strait and the Osumi-Kaikyo with the Kuroshio Tide, a very small portion of microplastics (1.45%) enter into the waters of Southeast Asian countries along with the west boundary current of South China Sea. The concentration distribution characteristics have obvious seasonal variation in the high concentration areas (the marginal seas around China and Sea of Japan). The mainly destination area of microplastics released in different cities is different.
基于拉格朗日随机游动粒子追踪方法和全球海洋再分析数据，本研究模拟了中国沿海城市排放的密度小于海水的微塑料颗粒在海洋中的扩散-输运过程，连续 12 年。结果表明，大部分微塑料（80.33%）基本上都滞留在中国沿海或周边海域，一小部分微塑料（18.22%）通过对马海峡和宗谷海峡，随黑潮进入日本海和西北太平洋，极少部分微塑料（1.45%）随南海西部边界流进入东南亚国家海域。在高浓度区（中国周边海域和日本海），浓度分布特征具有明显的季节性变化。不同城市排放的微塑料的主要归宿地不同。
