Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1653-2017 |
Contributions of nitrated aromatic compounds to the light absorption of water-soluble and particulate brown carbon in different atmospheric environments in Germany and China | |
Teich, Monique1; van Pinxteren, Dominik1; Wang, Michael2; Kecorius, Simonas1; Wang, Zhibin1,5; Mueller, Thomas1; Mocnik, Grisa3,4; Herrmann, Hartmut1 | |
2017-02-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Canada; Slovenia |
英文摘要 | The relative contributions of eight nitrated aromatic compounds (NACs: nitrophenols and nitrated salicylic acids) to the light absorption of aqueous particle extracts and particulate brown carbon were determined from aerosol particle samples collected in Germany and China. High-volume filter samples were collected during six campaigns, performed at five locations in two seasons: (I) two campaigns with strong influence of biomass-burning (BB) aerosol at the TROPOS institute (winter, 2014, urban background, Leipzig, Germany) and the Melpitz research site (winter, 2014, rural background); (II) two campaigns with strong influence from biogenic emissions at Melpitz (summer, 2014) and the forest site Waldstein (summer, 2014, Fichtelgebirge, Germany); and (III) two CAREBeijing-NCP campaigns at Xianghe (summer, 2013, anthropogenic polluted background) and Wangdu (summer, 2014, anthropogenic polluted background with a distinct BB episode), both in the North China Plain. The filter samples were analyzed for NAC concentrations and the light absorption of aqueous filter extracts was determined. Light absorption properties of particulate brown carbon were derived from a seven-wavelength aethalometer during the campaigns at TROPOS (winter) and Waldstein (summer). The light absorption of the aqueous filter extracts was found to be pH dependent, with larger values at higher pH. In general, the aqueous light absorption coefficient (Abs(370)) ranged from 0.21 to 21.8 Mm(-1) under acidic conditions and 0.63 to 27.2 Mm(-1) under alkaline conditions, over all campaigns. The observed mass absorption efficiency (MAE(370)) was in a range of 0.10-1.79 m(2) g(-1) and 0.24-2.57 m(2) g(-1) for acidic and alkaline conditions, respectively. For MAE370 and Abs370, the observed values were higher in winter than in summer, in agreement with other studies. The lowest MAE was observed for the Waldstein (summer) campaign (average of 0.17 +/- 0.03 m(2) g(-1)), indicating that freshly emitted biogenic aerosols are only weakly absorbing. In contrast, a strong relationship was found between the light absorption properties and the concentrations of levoglucosan, corroborating findings from other studies. Regarding the particulate light absorption at 370 nm, a mean particulate light absorption coefficient b(abs,)370 of 54 Mm(-1) and 6.0 Mm(-1) was determined for the TROPOS (winter) and Waldstein (summer) campaigns, respectively, with average contributions of particulate brown carbon to b(abs,)370 of 46% at TROPOS (winter) and 15% at Waldstein (summer). Thus, the aethalometer measurements support the findings from aqueous filter extracts of only weakly absorbing biogenic aerosols in comparison to the more polluted and BB influenced aerosol at TROPOS (winter). The mean contribution of NACs to the aqueous extract light absorption over all campaigns ranged from 0.10 to 1.25% under acidic conditions and 0.13 to 3.71% under alkaline conditions. The high variability among the measurement sites showed that the emission strengths of light-absorbing compounds and the composition of brown carbon were very different for each site. The mean contribution of NACs to the particulate brown carbon light absorption was 0.10 +/- 0.06% (acidic conditions) and 0.13 +/- 0.09% (alkaline conditions) during the Waldstein (summer) campaign and 0.25 +/- 0.21% (acidic conditions) and 1.13 +/- 1.03% (alkaline conditions) during the TROPOS (winter) campaign. The average contribution of NACs to the aqueous extract light absorption over all campaigns was found to be 5 times higher than their mass contribution to water-soluble organic carbon indicating that even small amounts of light-absorbing compounds can have a disproportionately high impact on the light absorption properties of particles. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395096200004 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; FUNCTIONALIZED CARBOXYLIC-ACIDS ; LIQUID-PHASE MICROEXTRACTION ; COMPLEX REFRACTIVE-INDEXES ; SPECTRAL DEPENDENCE ; SEASONAL-VARIATIONS ; OPTICAL-PROPERTIES ; ELEMENTAL CARBON ; SOLAR ABSORPTION ; BLACK CARBON |
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/26163 |
专题 | 地球科学 |
作者单位 | 1.Leibniz Inst Tropospher Res, TROPOS, D-04315 Leipzig, Germany; 2.McMaster Univ, Hamilton, ON L8S 4L8, Canada; 3.Aerosol Doo, Ljubljana 1000, Slovenia; 4.Jozef Stefan Inst, Condensed Phys Dept, Ljubljana, Slovenia; 5.Max Planck Inst Chem, Multiphase Chem Dept, D-55128 Mainz, Germany |
推荐引用方式 GB/T 7714 | Teich, Monique,van Pinxteren, Dominik,Wang, Michael,et al. Contributions of nitrated aromatic compounds to the light absorption of water-soluble and particulate brown carbon in different atmospheric environments in Germany and China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Teich, Monique.,van Pinxteren, Dominik.,Wang, Michael.,Kecorius, Simonas.,Wang, Zhibin.,...&Herrmann, Hartmut.(2017).Contributions of nitrated aromatic compounds to the light absorption of water-soluble and particulate brown carbon in different atmospheric environments in Germany and China.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Teich, Monique,et al."Contributions of nitrated aromatic compounds to the light absorption of water-soluble and particulate brown carbon in different atmospheric environments in Germany and China".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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