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Highly Oxygenated Organic Molecules (HOM) from Gas
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Highly oxygenated organic molecules (HOM) are formed in the atmosphere via autoxidation involving peroxy radicals arising from volatile organic compounds (VOC). HOM condense on pre-existing particles and can be involved in new particle formation. HOM thus contribute to the formation of secondary organic aerosol (SOA), a significant and ubiquitous component of atmospheric aerosol known to affect the Earth’s radiation balance. HOM were discovered only very recently, but the interest in these compounds has grown rapidly. In this Review, we define HOM and describe the currently available techniques for their identification/quantification, followed by a summary of the current knowledge on their formation mechanisms and physicochemical properties. A main aim is to provide a common frame for the currently quite fragmented literature on HOM studies. Finally, we highlight the existing gaps in our understanding and suggest directions for future HOM research.
中文翻译：
大气中的高氧有机分子（HOM）通过自氧化作用而形成，该自氧化涉及由挥发性有机化合物（VOC）引起的过氧自由基。HOM会凝聚在预先存在的粒子上，并可能参与新粒子的形成。因此，HOM有助于形成次级有机气溶胶（SOA），这是大气气溶胶的重要且普遍存在的成分，已知会影响地球的辐射平衡。HOM直到最近才被发现，但是对这些化合物的兴趣迅速增长。在本综述中，我们定义了HOM并描述了其鉴定/定量的当前可用技术，然后概述了有关其形成机理和理化性质的当前知识。主要目的是为当前关于HOM研究的零散文献提供一个通用框架。 |
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