Jang Myoseon, Czoschke Nadine M, Lee Sangdon, Kamens Richard M
Department of Environmental Sciences and Engineering, CB 7431, Rosenau Hall, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Science. 2002 Oct 25;298(5594):814-7. doi: 10.1126/science.1075798.
According to evidence from our laboratory, acidic surfaces on atmospheric aerosols lead to potentially multifold increases in secondary organic aerosol (SOA) mass. Experimental observations using a multichannel flow reactor, Teflon (polytetrafluoroethylene) film bag batch reactors, and outdoor Teflon-film smog chambers strongly confirm that inorganic acids, such as sulfuric acid, catalyze particle-phase heterogeneous reactions of atmospheric organic carbonyl species. The net result is a large increase in SOA mass and stabilized organic layers as particles age. If acid-catalyzed heterogeneous reactions of SOA products are included in current models, the predicted SOA formation will be much greater and could have a much larger impact on climate forcing effects than we now predict.
根据我们实验室的证据，大气气溶胶上的酸性表面会使二次有机气溶胶（SOA）质量可能增加数倍。使用多通道流动反应器、聚四氟乙烯薄膜袋间歇式反应器和户外聚四氟乙烯薄膜烟雾室进行的实验观察有力地证实，无机酸（如硫酸）催化大气有机羰基物种的颗粒相非均相反应。最终结果是，随着颗粒老化，SOA质量大幅增加，有机层得以稳定。如果当前模型纳入SOA产物的酸催化非均相反应，那么预测的SOA形成量将大得多，对气候强迫效应的影响可能比我们目前预测的要大得多。
