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

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.

Järvi, LeenaUniversity of Helsinki (författare)
Taipale, RistoUniversity of Helsinki (författare)
Laurila, TerhiUniversity of Helsinki (författare)
Patokoski, JohannaUniversity of Helsinki (författare)
Kajos, MaijaUniversity of Helsinki (författare)
Kurppa, MonaUniversity of Helsinki (författare)
Haapanala, SamiUniversity of Helsinki (författare)
Siivola, ErkkiUniversity of Helsinki (författare)
Petäjä, TuukkaUniversity of Helsinki (författare)
Ruuskanen, TainaUniversity of Helsinki (författare)
Rinne, JanneLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Finnish Meteorological Institute,University of Helsinki(Swepub:lu)ja4127ri (författare)
University of HelsinkiInstitutionen för naturgeografi och ekosystemvetenskap (creator_code:org_t)

Ingår i:Atmospheric Chemistry and Physics: Copernicus GmbH16:12, s. 7981-80071680-7324

Av författaren/redakt...: Rantala, Pekka; Järvi, Leena; Taipale, Risto; Laurila, Terhi; Patokoski, Johan ...; Kajos, Maija; visa fler...; Kurppa, Mona; Haapanala, Sami; Siivola, Erkki; Petäjä, Tuukka; Ruuskanen, Taina; Rinne, Janne; visa färre...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Meteorologi och ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.