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Anthropogenic and biogenic influence on VOC fluxes at an urban background site in Helsinki, Finland

Rantala, Pekka; Järvi, Leena; Taipale, Risto; Laurila, Terhi; Patokoski, Johanna; Kajos, Maija; Kurppa, Mona; Haapanala, Sami; Siivola, Erkki and Petäjä, Tuukka, et al. (2016) In Atmospheric Chemistry and Physics 16(12). p.7981-8007
Abstract
We measured volatile organic compounds (VOCs), carbon dioxide (CO2) and carbon monoxide (CO) at an urban background site near the city centre of Helsinki, Finland, northern Europe. The VOC and CO2 measurements were obtained between January 2013 and September 2014 whereas for CO a shorter measurement campaign in April–May 2014 was conducted. Both anthropogenic and biogenic sources were identified for VOCs in the study. Strong correlations between VOC fluxes and CO fluxes and traffic rates indicated anthropogenic source of many VOCs. The VOC with the highest emission rate to the atmosphere was methanol, which originated mostly from traffic and other anthropogenic sources. The traffic was also a major source for aromatic compounds in all... (More)
We measured volatile organic compounds (VOCs), carbon dioxide (CO2) and carbon monoxide (CO) at an urban background site near the city centre of Helsinki, Finland, northern Europe. The VOC and CO2 measurements were obtained between January 2013 and September 2014 whereas for CO a shorter measurement campaign in April–May 2014 was conducted. Both anthropogenic and biogenic sources were identified for VOCs in the study. Strong correlations between VOC fluxes and CO fluxes and traffic rates indicated anthropogenic source of many VOCs. The VOC with the highest emission rate to the atmosphere was methanol, which originated mostly from traffic and other anthropogenic sources. The traffic was also a major source for aromatic compounds in all seasons whereas isoprene was mostly emitted from biogenic sources during summer. Some amount of traffic-related isoprene emissions were detected during other seasons but this might have also been an instrumental contamination from cycloalkane products. Generally, the observed VOC fluxes were found to be small in comparison with previous urban VOC flux studies. However, the differences were probably caused by lower anthropogenic activities as the CO2 fluxes were also relatively small at the site. (Less)
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published
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Atmospheric Chemistry and Physics
volume
16
issue
12
pages
27 pages
publisher
Copernicus Gesellschaft Mbh
external identifiers
  • scopus:84977098520
  • wos:000379417300032
ISSN
1680-7324
DOI
10.5194/acp-16-7981-2016
language
English
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yes
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eef127ed-6819-4921-9746-997d99ee3db2
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2016-10-07 13:40:19
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2017-11-19 04:33:46
@article{eef127ed-6819-4921-9746-997d99ee3db2,
  abstract     = {We measured volatile organic compounds (VOCs), carbon dioxide (CO2) and carbon monoxide (CO) at an urban background site near the city centre of Helsinki, Finland, northern Europe. The VOC and CO2 measurements were obtained between January 2013 and September 2014 whereas for CO a shorter measurement campaign in April–May 2014 was conducted. Both anthropogenic and biogenic sources were identified for VOCs in the study. Strong correlations between VOC fluxes and CO fluxes and traffic rates indicated anthropogenic source of many VOCs. The VOC with the highest emission rate to the atmosphere was methanol, which originated mostly from traffic and other anthropogenic sources. The traffic was also a major source for aromatic compounds in all seasons whereas isoprene was mostly emitted from biogenic sources during summer. Some amount of traffic-related isoprene emissions were detected during other seasons but this might have also been an instrumental contamination from cycloalkane products. Generally, the observed VOC fluxes were found to be small in comparison with previous urban VOC flux studies. However, the differences were probably caused by lower anthropogenic activities as the CO2 fluxes were also relatively small at the site.},
  author       = {Rantala, Pekka and Järvi, Leena and Taipale, Risto and Laurila, Terhi and Patokoski, Johanna and Kajos, Maija and Kurppa, Mona and Haapanala, Sami and Siivola, Erkki and Petäjä, Tuukka and Ruuskanen, Taina and Rinne, Janne},
  issn         = {1680-7324},
  language     = {eng},
  number       = {12},
  pages        = {7981--8007},
  publisher    = {Copernicus Gesellschaft Mbh},
  series       = {Atmospheric Chemistry and Physics},
  title        = {Anthropogenic and biogenic influence on VOC fluxes at an urban background site in Helsinki, Finland},
  url          = {http://dx.doi.org/10.5194/acp-16-7981-2016},
  volume       = {16},
  year         = {2016},
}