Particulate sources during winter haze in China and in Europe

摘要

Organic aerosol (OA) is a large fraction of total particulate matter, either directly emitted into the atmosphere (primary) or formed in air by oxidation processes (secondary) of gas precursors (Jimenez et al., 2009). Particulate matter is one of the most important environmental impacts on human health. The examination of sources and their contribution in different regions during severe pollution episodes is thus important for designing effective mitigation strategies. Such analyses require measurements capable of quantitatively distinguishing OA sources, ideally distributed over a broad spatial scale with sufficient spatial density to capture regional differences.