北极洋沉积物作为海洋微塑料的重要当前和未来沉积点,在全球微塑料预算中缺失了海洋微塑料
Seung-Kyu Kim1,2, Ji-Su Kim1, So-Young Kim3
1Department of Marine Science, College of Natural Sciences, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea.
Science advances
|July 5, 2023
概括
北极沉积物是微塑料 (MP) 的一个主要沉积点,沉积量每年增加3%. 这些发现揭示了北冰洋西部大量的PM积累,超过了全球平均水平,表明未来的污染.
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:
- 了解海洋环境中微塑料 (MP) 的命运至关重要,因为估计的投入和观察到的表面负荷之间存在差异.
- 北极海洋的独特环境可能会充当微塑料的沉池,但其在全球PM预算中的作用仍然不够量化.
研究的目的:
- 量化西北冰洋 (WAO) 多个区域的微塑料 (MP) 预算.
- 识别和评估北极沉积物作为微塑料 (MP) 沉降池的重要性.
- 预测未来在北极地区的微塑料 (MP) 污染趋势.
主要方法:
- 在海水和表面沉积物中分析微塑料 (MP) 负载.
- 沉积物核心分析以确定历史的MP沉积率.
- 对北冰洋西部 (WAO) 的MP预算的计算.
主要成果:
- 北极沉积物充当了微塑料 (MP) 的重要当前和未来沉积点.
- 微塑料 (MP) 在沉积物中的沉积量每年增加3%.
- 在海水和沉积物中观察到较高的MP度,这些沉积物靠近夏季海冰的撤退.
结论:
- 北极沉积物是微塑料 (MP) 的关键,以前被低估的沉降池,承载着相当大的当前和未来负载.
- 西北冰洋 (WAO) 的总MP负载为15.7 ± 2.30 × 10^16 N,其中90%被埋在1930年后的沉积物中.
- 塑料输送到北极地区的滞后表明,未来的微塑料 (MP) 污染将会增加.
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