Forest fires are considered one of the drivers of global carbon and aerosol emissions; however, few studies have focused on the release of persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs) from forest fires and their regional impacts. In this study, we estimated the emissions of POPs and PAHs from South Asian forest fires and simulated the atmospheric transport of these fire-emitted pollutants to the Tibetan plateau over the Himalaya. It was found that forest fires on the southern slopes of the central Himalaya contributed 20–30% of atmospheric POPs and PAHs during the nonmonsoon season. Under a forest fire scenario, the transport fluxes of DDTs and PAHs increased by ∼25% and ∼20%, respectively, suggesting that forest fires can enhance the transboundary transport of organic pollutants to remote regions, even breaking the barrier of the Himalaya, the highest mountain range in the world. Considering the growth of large-scale wildfires driven by climatic and anthropogenic influences in recent years, forest fires may redistribute POPs globally and thus weaken the regulatory efficiency of the Stockholm Convention to protect remote/polar regions from POP pollution.

中文翻译：

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森林火灾增强了持久性有机污染物和多环芳烃从喜马拉雅中部向青藏高原的排放和输送

森林火灾被认为是全球碳和气溶胶排放的驱动因素之一；然而，很少有研究关注森林火灾中持久性有机污染物 (POPs) 和多环芳烃 (PAHs) 的释放及其区域影响。在这项研究中，我们估计了南亚森林火灾中持久性有机污染物和多环芳烃的排放量，并模拟了这些火灾排放的污染物在喜马拉雅山上空向青藏高原的大气传输。研究发现，在非季风季节，喜马拉雅中部南坡的森林火灾贡献了 20-30% 的大气持久性有机污染物和多环芳烃。在森林火灾情景下，DDTs 和 PAHs 的传输通量分别增加了 25% 和 20%，表明森林火灾可以增强有机污染物向偏远地区的越境传输，甚至打破了喜马拉雅山脉的屏障，这是世界上最高的山脉。考虑到近年来由气候和人为影响驱动的大规模野火的增长，森林火灾可能会重新分布全球持久性有机污染物，从而削弱斯德哥尔摩公约保护偏远/极地地区免受持久性有机污染物污染的监管效率。