在伊比利亚半岛周围的非浮力塑料分散的数值模拟
Jorge A Blanco Vime1, Carmen Morales-Caselles2, Gregory C Smith3
1Universidad de Cádiz (UCA) - Universidad de Cádiz, Facultades de Ciencias y Ciencias del Mar y Ambientales, 11519, Puerto Real, Spain; Oceana (Oceana), Gran Vía, 62 7° Izq. 28013, Madrid, Spain.
Marine pollution bulletin
|December 19, 2025
概括
这项研究模拟了在伊比利亚半岛周围的非浮动塑料污染. 结果显示,塑料在大陆架上积累,深海水流阻止了加迪斯湾的海底积累.
科学领域:
- 环境科学 环境科学
- 海洋学 海洋学 海洋学
- 海洋污染 海洋污染
背景情况:
- 海洋塑料污染是一个重要的全球环境问题,促使国际谈判建立全球塑料条约.
- 数字模型对于了解海洋塑料分散,识别积累区和运输途径至关重要.
- 与浮动塑料研究相比,研究海底塑料积累的研究规模较小.
研究的目的:
- 使用3D欧利尔模型预测海底的非漂浮塑料在伊比利亚半岛周围的积累模式.
- 调查陆地来源与海洋来源对塑料分布的影响.
- 在现实的每日引入率下,模拟在五年内塑料分散.
主要方法:
- 使用3D欧利尔模型模拟四种常见类型的非浮动塑料的分散.
- 我们比较了两个场景:仅来自陆地来源的塑料,以及来自陆地和海洋活动的塑料.
- 模拟了一个5年的分散期,从一个没有塑料的海洋开始,每天连续输入塑料.
主要成果:
- 在加迪斯湾西南部确定了一个没有塑料的区域,这归因于强大的深海海流阻止了塑料沉积.
- 观察到沿海非浮性塑料主要积聚在大陆架上.
- 证明塑料可以分散到公开的海洋中并到达海底山脉,而分布受到距离海岸的距离的影响.
- 发现,包括海洋来源导致塑料在公海中的分布更广泛.
结论:
- 深海海流在防止海底塑料在卡迪斯湾等特定地区积聚起关键作用.
- 大陆架作为沿海非浮性塑料的主要积聚区,具有更广泛分散的潜力.
- 塑料污染的来源 (陆基与海基) 显著影响其在海洋环境中的分布模式.
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