Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols.
Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols.
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DOI：
10.1038/srep35038
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发表时间：
2016-10-13
影响因子：
4.6
通讯作者：
Kalberer M
中科院分区：
文献类型：
--
作者：
Kourtchev I;Giorio C;Manninen A;Wilson E;Mahon B;Aalto J;Kajos M;Venables D;Ruuskanen T;Levula J;Loponen M;Connors S;Harris N;Zhao D;Kiendler-Scharr A;Mentel T;Rudich Y;Hallquist M;Doussin JF;Maenhaut W;Bäck J;Petäjä T;Wenger J;Kulmala M;Kalberer M
二次有机气溶胶（SOA）占亚微米大气颗粒物质量的主要部分，但SOA的形成，组成和气候效应的知识是不完整的，限制了我们对大气中的气溶胶的整体效应的理解。十多年前，在实验室实验中发现有机低聚物是SOA中的主要成分，并且此后提出在许多气溶胶过程中起主导作用。然而，目前尚不清楚低聚物是否在环境大气条件下相关，因为它们往往不能清楚地观察到现场样品。在这里，我们解决了这个长期存在的差异，表明SOA质量升高是低聚物形成的环境气氛和实验室实验的关键驱动因素之一。我们第一次表明，气溶胶中的一个特定的有机化合物类，低聚物，与SOA粒子的云凝结核（CCN）活动密切相关。这些研究结果可能对未来的气候情景具有重要意义，其中温度升高会导致更高的生物挥发性有机化合物（VOC）排放，从而导致更高的SOA质量形成和SOA组成的显着变化。气候模型需要考虑这些过程，以便现实地反映未来的气溶胶-气候-生物圈反馈。
Secondary organic aerosol (SOA) accounts for a dominant fraction of the submicron atmospheric particle mass, but knowledge of the formation, composition and climate effects of SOA is incomplete and limits our understanding of overall aerosol effects in the atmosphere. Organic oligomers were discovered as dominant components in SOA over a decade ago in laboratory experiments and have since been proposed to play a dominant role in many aerosol processes. However, it remains unclear whether oligomers are relevant under ambient atmospheric conditions because they are often not clearly observed in field samples. Here we resolve this long-standing discrepancy by showing that elevated SOA mass is one of the key drivers of oligomer formation in the ambient atmosphere and laboratory experiments. We show for the first time that a specific organic compound class in aerosols, oligomers, is strongly correlated with cloud condensation nuclei (CCN) activities of SOA particles. These findings might have important implications for future climate scenarios where increased temperatures cause higher biogenic volatile organic compound (VOC) emissions, which in turn lead to higher SOA mass formation and significant changes in SOA composition. Such processes would need to be considered in climate models for a realistic representation of future aerosol-climate-biosphere feedbacks.
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影响因子：
6.3
作者：
Carslaw, K. S.;Boucher, O.;Kulmala, M.
通讯作者：
Kulmala, M.
影响因子：
11.4
作者：
Kourtchev, Ivan;Fuller, Stephen;Kalberer, Markus
通讯作者：
Kalberer, Markus
DOI：
10.1034/j.1600-0889.2001.530403.x
发表时间：
2001-09-01
影响因子：
2.3
作者：
Aalto, P;Hämeri, K;Kulmala, M
通讯作者：
Kulmala, M
影响因子：
4.4
作者：
Lee, Anita;Goldstein, Allen H.;Seinfeld, John H.
通讯作者：
Seinfeld, John H.
影响因子：
3.8
作者：
Kajos, M. K.;Rantala, P.;Petaja, T.
通讯作者：
Petaja, T.