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DOI | 10.1073/pnas.1900129116 |
Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke | |
Kouji Adachi; Arthur J. Sedlacek III; Lawrence Kleinman; Stephen R. Springston; Jian Wang; Duli Chand; John M. Hubbe; John E. Shilling; Timothy B. Onasch; Takeshi Kinase; Kohei Sakata; Yoshio Takahashi; and Peter R. Buseck | |
2019 | |
发表期刊 | Proceedings of the National Academy of Sciences of the United States of America
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ISSN | 0027-8475 |
出版年 | 2019 |
卷号 | 116期号:39页码:19336-19341 |
语种 | 英语 |
英文摘要 | AbstractBiomass burning (BB) emits enormous amounts of aerosol particles and gases into the atmosphere and thereby significantly influences regional air quality and global climate. A dominant particle type from BB is spherical organic aerosol particles commonly referred to as tarballs. Currently, tarballs can only be identified, using microscopy, from their uniquely spherical shapes following impaction onto a grid. Despite their abundance and potential significance for climate, many unanswered questions related to their formation, emission inventory, removal processes, and optical properties still remain. Here, we report analysis that supports tarball formation in which primary organic particles undergo chemical and physical processing within ∼3 h of emission. Transmission electron microscopy analysis reveals that the number fractions of tarballs and the ratios of N and O relative to K, the latter a conserved tracer, increase with particle age and that the more-spherical particles on the substrates had higher ratios of N and O relative to K. Scanning transmission X-ray spectrometry and electron energy loss spectrometry analyses show that these chemical changes are accompanied by the formation of organic compounds that contain nitrogen and carboxylic acid. The results imply that the chemical changes increase the particle sphericity on the substrates, which correlates with particle surface tension and viscosity, and contribute to tarball formation during aging in BB smoke. These findings will enable models to better partition tarball contributions to BB radiative forcing and, in so doing, better help constrain radiative forcing models of BB events. |
英文关键词 | tarball biomass burning climate change organic aerosol transmission electron microscopy |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/232538 |
专题 | 地球科学 资源环境科学 气候变化 |
推荐引用方式 GB/T 7714 | Kouji Adachi,Arthur J. Sedlacek III,Lawrence Kleinman,et al. Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke[J]. Proceedings of the National Academy of Sciences of the United States of America,2019,116(39):19336-19341. |
APA | Kouji Adachi.,Arthur J. Sedlacek III.,Lawrence Kleinman.,Stephen R. Springston.,Jian Wang.,...&and Peter R. Buseck.(2019).Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke.Proceedings of the National Academy of Sciences of the United States of America,116(39),19336-19341. |
MLA | Kouji Adachi,et al."Spherical tarball particles form through rapid chemical and physical changes of organic matter in biomass-burning smoke".Proceedings of the National Academy of Sciences of the United States of America 116.39(2019):19336-19341. |
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