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Ice-nucleating part...
Ice-nucleating particle concentrations unaffected by urban air pollution in Beijing, China
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Chen, J. (författare)
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Wu, Z. J. (författare)
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Augustin-Bauditz, S. (författare)
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Grawe, S. (författare)
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Hartmann, M. (författare)
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- Pei, Xiangyu (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology
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Liu, Z. R. (författare)
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Ji, D. S. (författare)
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Wex, H. K. (författare)
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(creator_code:org_t)
- 2018-03-12
- 2018
- Engelska.
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Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 18:5, s. 3523-3539
- Relaterad länk:
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https://www.atmos-ch...
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https://gup.ub.gu.se...
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https://doi.org/10.5...
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Abstract
Ämnesord
Stäng
- Exceedingly high levels of PM2.5 with complex chemical composition occur frequently in China. It has been speculated whether anthropogenic PM2.5 may significantly contribute to ice-nucleating particles (INP). However, few studies have focused on the ice-nucleating properties of urban particles. In this work, two ice-nucleating droplet arrays have been used to determine the atmospheric number concentration of INP (N-INP) in the range from 6 to 25 degrees C in Beijing. No correlations between N-INP and either PM2.5 or black carbon mass concentrations were found, although both varied by more than a factor of 30 during the sampling period. Similarly, there were no correlations between N-INP and either total particle number concentration or number concentrations for particles with diameters > 500 nm. Furthermore, there was no clear difference between day and night samples. All these results indicate that Beijing air pollution did not increase or decrease INP concentrations in the examined temperature range above values observed in nonurban areas; hence, the background INP concentrations might not be anthropogenically influenced as far as urban air pollution is concerned, at least in the examined temperature range.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Nyckelord
- mixed-phase clouds
- mineral dust particles
- atmospheric aerosols
- secondary formation
- southeast china
- ash particles
- black carbon
- nuclei
- water
- samples
- Meteorology & Atmospheric Sciences
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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