不同来源的有机气溶胶对全球健康和气候的影响,Environmental Science & Technology

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不同来源的有机气溶胶对全球健康和气候的影响
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2023-09-06 , DOI: 10.1021/acs.est.3c02823
Duseong S Jo ₁ , Benjamin A Nault _{2,

3} , Simone Tilmes ₁ , Andrew Gettelman _{1,

4} , Christina S McCluskey ₄ , Alma Hodzic ₁ , Daven K Henze ₅ , Muhammad Omar Nawaz ₅ , Ka Ming Fung ₆ , Jose L Jimenez _{7,

8}

Affiliation

气溶胶对人类健康和气候的影响已广为人知，但许多研究仅关注 PM _2.5总量或人类活动造成的变化。这项研究量化了人为、生物质燃烧和生物来源的有机气溶胶 (OA) 对健康和气候的影响。使用 CAM-chem 和 GEOS-Chem 这两种大气化学模型，我们的研究结果表明，由于与人口和地表反照率相关的时空变化，人为初级 OA (POA) 对健康影响的效率最高，但对直接辐射影响的效率最低。将 POA 处理为非挥发性或半挥发性也会通过不同的化学过程影响这些效率。生物 OA 对健康影响的效率中等，对直接辐射影响的效率最高，但对间接影响的效率最低，这是由于生物 OA 丰富地区气溶胶与辐射相互作用的稳定温度分布导致高云减少。生物质燃烧 OA 对于偏远大气中的云辐射效应变化非常重要，因为它能够比其他 OA 传输得更远。这项研究不仅强调了毒性和折射率等 OA 特征的重要性，还强调了传输和化学等大气过程在确定健康和气候影响效率方面的重要性。

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Global Health and Climate Effects of Organic Aerosols from Different Sources

The impact of aerosols on human health and climate is well-recognized, yet many studies have only focused on total PM_2.5 or changes from anthropogenic activities. This study quantifies the health and climate effects of organic aerosols (OA) from anthropogenic, biomass burning, and biogenic sources. Using two atmospheric chemistry models, CAM-chem and GEOS-Chem, our findings reveal that anthropogenic primary OA (POA) has the highest efficiency for health effects but the lowest for direct radiative effects due to spatial and temporal variations associated with population and surface albedo. The treatment of POA as nonvolatile or semivolatile also influences these efficiencies through different chemical processes. Biogenic OA shows moderate efficiency for health effects and the highest for direct radiative effects but has the lowest efficiency for indirect effects due to the reduced high cloud, caused by stabilized temperature profiles from aerosol–radiation interactions in biogenic OA-rich regions. Biomass burning OA is important for cloud radiative effect changes in remote atmospheres due to its ability to be transported further than other OAs. This study highlights the importance of not only OA characteristics such as toxicity and refractive index but also atmospheric processes such as transport and chemistry in determining health and climate impact efficiencies.

更新日期：2023-09-06

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