空气中的微塑料的直接辐射效应
Laura E Revell1, Peter Kuma2,3, Eric C Le Ru4
1School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand. laura.revell@canterbury.ac.nz.
Nature
|October 21, 2021
概括
空气中的微塑料是大气污染物. 它们的辐射效应很小,但随着塑料生产的增加,可能会对全球气候产生影响.
科学领域:
- 大气科学
- 气候科学
- 环境科学
背景情况:
- 微塑料被认为是全球大气污染物,
- 大气中的气溶,像矿物尘埃一样,通过有效辐射力 (ERF) 量化的辐射效应影响气候.
- 空气中的微塑料对全球气候的辐射影响仍然基本不明.
研究的目的:
- 计算空气中的微塑料的光学特性和直接辐射效应.
- 估计当前大气中空气中的微塑料的有效辐射强迫 (ERF).
- 评估日益增长的微塑料污染对未来气候的影响.
主要方法:
- 空气中的微塑料的光学特性.
- 在各种分布场景下计算了微塑料的直接辐射效应和ERF.
- 从辐射效应计算中排除了气溶与云的相互作用.
主要成果:
- 空气中的微塑料的ERF估计为0.044±0.399mW/m2,分布在10公里范围内均.
- 限于边界层,微塑料的ERF大约为-0.746 ± 0.553 mW/m2,由短波效应主导.
- 目前的微塑料ERF与气溶辐射相互作用相比较小,但预计将增加.
结论:
- 空气中的微塑料具有辐射效应,
- 未来塑料产量增加和废物管理不足可能会增加微塑料的大量和辐射强迫.
- 需要对塑料生产和废物管理采取紧急行动,以减轻潜在的未来气候影响.
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