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

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Rantala , P , Järvi , L , Taipale , R , Laurila , T K , Patokoski , J , Kajos , M K , Kurppa , M , Haapanala , S , Siivola , E , Petäjä , T , Ruuskanen , T M & Rinne , J 2016 , ' Anthropogenic and biogenic influence on VOC fluxes at an urban background site in Helsinki, Finland ' , Atmospheric Chemistry and Physics , vol. 16 , no. 12 , pp. 7981-8007 . https://doi.org/10.5194/acp-16-7981-2016

Title: Anthropogenic and biogenic influence on VOC fluxes at an urban background site in Helsinki, Finland
Author: Rantala, Pekka; Järvi, Leena; Taipale, Risto; Laurila, Terhi K.; Patokoski, Johanna; Kajos, Maija K.; Kurppa, Mona; Haapanala, Sami; Siivola, Erkki; Petäjä, Tuukka; Ruuskanen, Taina M.; Rinne, Janne
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Geosciences and Geography
Date: 2016
Language: eng
Number of pages: 27
Belongs to series: Atmospheric Chemistry and Physics
ISSN: 1680-7316
URI: http://hdl.handle.net/10138/165565
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.
Subject: VOLATILE ORGANIC-COMPOUNDS
REACTION-MASS-SPECTROMETRY
SURFACE-ATMOSPHERE INTERACTIONS
EMISSION RATE VARIABILITY
DISJUNCT-EDDY-COVARIANCE
PTR-MS
CENTRAL LONDON
SOURCE APPORTIONMENT
ISOPRENE EMISSIONS
TECHNICAL NOTE
114 Physical sciences
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