Quantifying Atmospheric Parameter Ranges for Ambient Secondary Organic Aerosol Formation,ACS Earth and Space Chemistry

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Quantifying Atmospheric Parameter Ranges for Ambient Secondary Organic Aerosol Formation
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2021-07-14 , DOI: 10.1021/acsearthspacechem.1c00090
William C. Porter ₁ , Jose L. Jimenez ₂ , Kelley C. Barsanti ₃

Affiliation

Understanding of the fundamental chemical and physical processes that lead to the formation and evolution of secondary organic aerosol (SOA) in the atmosphere has been rapidly advancing over the past decades. Many of these advancements have been achieved through laboratory studies, particularly SOA studies conducted in environmental chambers. Results from such studies are used to develop simplified representations of SOA formation in regional- and global-scale air quality models. Although it is known that there are limitations in the extent to which laboratory experiments can represent the ambient atmosphere, there have been no systematic surveys of what defines atmospheric relevance in the context of SOA formation. In this work, GEOS-Chem version 12.3 was used to quantitatively describe atmospherically relevant ranges of chemical and meteorological parameters critical for predictions of the mass, composition, and physical properties of SOA. For some parameters, atmospherically relevant ranges are generally well represented in laboratory studies. However for other parameters, significant gaps exist between atmospherically relevant ranges and typical laboratory conditions. For example, cold winter (less than 0 °C) and humid (greater than 70% RH) conditions are relatively common on the Earth’s surface but are poorly represented in published chamber data. Furthermore, the overlap in relative humidity and organic aerosol mass between chamber studies and ambient conditions is almost nonexistent. For parameters with significant gaps, extended laboratory studies and/or mechanistic models are needed to bridge these gaps.

中文翻译：

量化环境二次有机气溶胶形成的大气参数范围

在过去的几十年里，对导致大气中二次有机气溶胶 (SOA) 形成和演化的基本化学和物理过程的理解一直在迅速推进。许多这些进步是通过实验室研究取得的，特别是在环境室中进行的 SOA 研究。此类研究的结果用于开发区域和全球尺度空气质量模型中 SOA 形成的简化表示。尽管众所周知，实验室实验可以代表环境大气的程度存在限制，但还没有系统调查什么定义了 SOA 形成背景下的大气相关性。在这项工作中，GEOS-Chem 版本 12。3 用于定量描述对预测 SOA 的质量、成分和物理特性至关重要的化学和气象参数的大气相关范围。对于某些参数，与大气相关的范围通常在实验室研究中得到很好的体现。然而，对于其他参数，大气相关范围与典型实验室条件之间存在显着差距。例如，寒冷的冬天（低于 0 °C）和潮湿（高于 70% RH）条件在地球表面相对常见，但在已发布的室内数据中却很少体现。此外，腔室研究和环境条件之间的相对湿度和有机气溶胶质量的重叠几乎不存在。对于有显着差距的参数，

更新日期：2021-09-16

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