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DOI | 10.5194/acp-18-12477-2018 |
Cloud droplet activation of black carbon particles coated with organic compounds of varying solubility | |
Dalirian, Maryam1,2; Ylisirnio, Arttu3; Buchholz, Angela3; Schlesinger, Daniel1,2; Strom, Johan1,2; Virtanen, Annele3; Riipinen, Ilona1,2 | |
2018-08-28 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:16页码:12477-12489 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Finland |
英文摘要 | Atmospheric black carbon (BC) particles are a concern due to their impact on air quality and climate. Their net climate effect is, however, still uncertain. This uncertainty is partly related to the contribution of coated BC particles to the global cloud condensation nuclei (CCN) budgets. In this study, laboratory measurements were performed to investigate CCN activity of BC (REGAL 400R pigment black) particles, in pure state or coated through evaporating and subsequent condensation of glutaric acid, levoglucosan (both water-soluble organics) or oleic acid (an organic compound with low solubility). A combination of soot particle aerosol mass spectrometer (SP-AMS) measurements and size distribution measurements with a scanning mobility particle sizer (SMPS) showed that the studied BC particles were nearly spherical agglomerates with a fractal dimension of 2.79 and that they were coated evenly by the organic species. The CCN activity of BC particles increased after coating with all the studied compounds and was governed by the fraction of organic material. The CCN activation of the BC particles coated by glutaric acid and levoglucosan were in good agreement with the theoretical calculations using the shell-and-core model, which is based on a combination of the CCN activities of the pure compounds. The oleic acid coating enhanced the CCN activity of the BC particles, even though the pure oleic acid particles were CCN inactive. The surprising effect of oleic acid might be related to the arrangement of the oleic acid molecules on the surface of the BC cores or other surface phenomena facilitating water condensation onto the coated particles. Our results show that present theories have potential for accurately predicting the CCN activity of atmospheric BC coated with organic species, given that the identities and amounts of the coating species are known. Furthermore, our results suggest that even relatively thin soluble coatings (around 2 nm for the compounds studied here) are enough to make the insoluble BC particles CCN active at typical atmospheric supersaturations and thus be efficiently taken up by cloud droplets. This highlights the need for an accurate description of the composition of atmospheric particles containing BC to unravel their net impact on climate. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442942600004 |
WOS关键词 | AEROSOL MASS-SPECTROMETER ; CONDENSATION NUCLEUS ACTIVITY ; ENHANCED LIGHT-ABSORPTION ; PARTICULATE AIR-POLLUTION ; DICARBOXYLIC-ACIDS ; VAPOR-PRESSURES ; CCN ACTIVATION ; SULFURIC-ACID ; INSOLUBLE PARTICLES ; HYGROSCOPIC GROWTH |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/18433 |
专题 | 地球科学 |
作者单位 | 1.Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Stockholm, Sweden; 2.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden; 3.Univ Eastern Finland, Dept Appl Phys, Kuopio, Finland |
推荐引用方式 GB/T 7714 | Dalirian, Maryam,Ylisirnio, Arttu,Buchholz, Angela,et al. Cloud droplet activation of black carbon particles coated with organic compounds of varying solubility[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(16):12477-12489. |
APA | Dalirian, Maryam.,Ylisirnio, Arttu.,Buchholz, Angela.,Schlesinger, Daniel.,Strom, Johan.,...&Riipinen, Ilona.(2018).Cloud droplet activation of black carbon particles coated with organic compounds of varying solubility.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(16),12477-12489. |
MLA | Dalirian, Maryam,et al."Cloud droplet activation of black carbon particles coated with organic compounds of varying solubility".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.16(2018):12477-12489. |
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