The links between marine plastic litter and the air-sea flux of greenhouse gases
The links between marine plastic litter and the air-sea flux of greenhouse gases
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DOI：
10.3389/fmars.2023.1180761
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发表时间：
2023-07
影响因子：
3.7
通讯作者：
L. Goddijn-Murphy;D. Woolf;R. Pereira;C. Marandino;A. Callaghan;J. Piskozub
中科院分区：
文献类型：
--
作者：
L. Goddijn-Murphy;D. Woolf;R. Pereira;C. Marandino;A. Callaghan;J. Piskozub
气候变化和塑料污染是人类活动造成的两个最紧迫的环境挑战，它们之间有直接和间接的联系。我们关注海洋塑料垃圾与温室气体（GHG）海气通量之间的关系。海洋塑料垃圾有可能增加和减少海洋温室气体通量，但这取决于许多尚未充分了解的因素。不同种类的塑料在海洋中的表现截然不同，以不同的、很大程度上未知的方式影响空气-海洋气体交换。温室气体的海气交换机制已被广泛研究，如果海气交换系数以及水和空气中气体的浓度已知，计算所得的温室气体通量就相当简单。然而，人们对海洋塑料垃圾对气体传输系数、浓度和通量的影响知之甚少。在这里，我们评估了控制海洋和大气之间温室气体交换的最重要方面，以及海洋塑料垃圾如何改变这些方面。目的是改进存在塑料垃圾的情况下的海空温室气体通量计算，我们在很大程度上仅限于识别过程，而不是估计相对重要性。
Climate change and plastic pollution are two of the most pressing environmental challenges caused by human activity, and they are directly and indirectly linked. We focus on the relationship between marine plastic litter and the air-sea flux of greenhouse gases (GHGs). Marine plastic litter has the potential to both enhance and reduce oceanic GHG fluxes, but this depends on many factors that are not well understood. Different kinds of plastic behave quite differently in the sea, affecting air-sea gas exchange in different, largely unknown, ways. The mechanisms of air-sea exchange of GHGs have been extensively studied and if air-sea gas transfer coefficients and concentrations of the gas in water and air are known, calculating the resulting GHG fluxes is reasonably straightforward. However, relatively little is known about the consequences of marine plastic litter for gas transfer coefficients, concentrations, and fluxes. Here we evaluate the most important aspects controlling the exchange of GHGs between the sea and the atmosphere and how marine plastic litter could change these. The aim is to move towards improving air-sea GHG flux calculations in the presence of plastic litter and we have largely limited ourselves to identifying processes, rather than estimating relative importance.