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在热带安第斯冰川中,大气中微塑料的积累率在一个水文年内增加

Julieth E Chancay-Sánchez¹, Angela Rozas-Dávila², Gabriel M Moulatlet³

¹Facultad de Ciencias de la Tierra y Agua, Universidad Regional Amazónica Ikiam, Km 7, vía Muyuna, Tena, Napo, Ecuador; Grupo de investigación de Ciencias de la Tierra y Clima, Universidad Regional Amazónica Ikiam, Km 7, Vía Muyuna, Tena, Napo, Ecuador.

The Science of the total environment

|November 22, 2025

概括

大气中的微塑料 (MPs) 在热带安第斯冰川中以越来越快的速度积累. 这项研究揭示了一年多的MP积累量翻了一番,突出显示上层大气是持久的储存库.

科学领域:

环境科学环境科学
大气科学大气科学
冰川学的冰川学

背景情况:

微塑料 (MPs),从5毫米到0.001毫米的塑料颗粒,分布在全球,在各种生态系统中发现.
众议员的大气运输是一个已知的现象,但它们的积累率,特别是在像冰川这样的偏远地区,是鲜为人知的.
冰层环境作为历史大气沉积的关键档案.

研究的目的:

为了重建大气中微塑料在热带安第斯冰川中整个水文一年的积累速度.
为了识别沉积的微塑料的类型和聚合物.
评估上层热带层在微塑料运输和持久性中的作用.

主要方法:

一个8米长的冰芯从冰川15-α,安蒂萨纳火山,厄瓜多尔提取出来.
冰芯的日期是使用稳定的氧同位素 (δ¹⁸O) 来定义水文年.
微塑料被视觉识别,量化,并使用微FTIR光谱分析聚合物类型.

主要成果:

在冰芯中共发现了1762个微塑料颗粒 (纤维和碎片).
聚乙烯和聚甲基甲酸是主要的聚合物类型.
微塑料的积累率显著增加,在研究期间从140个MP/L增加到292个MP/L,增加了一倍多.

结论:

这项研究提供了第一个定量证据,证明了热带冰川在水文一年中的微塑料积累增加.
在高层热带层中持续存在的微塑料表明,它充当长期储存库,绕过典型的去除机制.
这些发现对理解大气作为全球微塑料载体的作用具有重大意义,影响生态系统并对人类和野生动物健康构成潜在风险.

关键词:

这是一个Antisana.污染物污染物污染物环境环境环境环境冰芯的核心是冰.同位素同位素是同位素.塑料塑料是一种塑料.

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