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微塑料在南半球的长距离大气运输

Qiqing Chen¹, Guitao Shi^2,3, Laura E Revell⁴

¹State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China.

Nature communications

|November 30, 2023

概括

空气中的微塑料 (MPs) 在全球范围内运输. 这项研究揭示了MP纤维比碎片的距离更远,形态是它们远程大气运输到南极洲的关键.

科学领域:

环境科学环境科学
大气化学大气化学
海洋科学海洋科学

背景情况:

空气中的微塑料 (MP) 是全球污染物,对它们在海洋边界层中的存在存在存在重大知识差距.
了解MPs的大气传输对于全球建模和评估其环境影响至关重要.
根据大小和形态,国会议员的不同运输效率在很大程度上仍未得到量化.

研究的目的:

调查从北半球中部到南极半球半球范围的半球横断过程中空中MPs的发生和度.
为了确定不同尺寸和形态的MP在海洋边界层的运输效率.
确定形态学在长距离大气运输中的作用,将国会议员运送到像南极洲这样的偏远地区.

主要方法:

进行了一项基于巡航的研究,分析空气中的微塑料度沿着一条跨越北半球到南极的路径.
在南洋和南极洲内部进行了MPs度的首次测量.
分析了粒子形态学 (纤维与碎片) 对运输动态的影响.

主要成果:

首次记录了南洋和南极洲内陆的空中MP度.
发现微塑料纤维表现出比微塑料碎片更有效的长距离运输.
观察到MP的运输动态与非塑料颗粒的运输动态相似.
确定了形态作为管理MPs到南极洲半球运输的主要因素.

结论:

空气中的微塑料在半球尺度上运输,到达像南极洲这样的偏远地区.
粒子形态显著影响了微塑料的长距离大气运输.
远程大气运输在微塑料的环境循环中起着至关重要的作用.

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