Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison

Okuljar, Magdalena; Garmash, Olga; Olin, Miska; Kalliokoski, Joni; Timonen, Hilkka; Niemi, Jarkko V.; Paasonen, Pauli; Kontkanen, Jenni; Zhang, Yanjun; Hellén, Heidi; Kuuluvainen, Heino; Aurela, Minna; Manninen, Hanna E.; Sipilä, Mikko; Rönkkö, Topi; Petäjä, Tuukka; Kulmala, Markku; Dal Maso, Miikka; Ehn, Mikael

doi:https://doi.org/10.5194/acp-23-12965-2023

Articles | Volume 23, issue 20

https://doi.org/10.5194/acp-23-12965-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-12965-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 20

Research article

|

16 Oct 2023

Research article |

| 16 Oct 2023

Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison

Magdalena Okuljar, Olga Garmash, Miska Olin, Joni Kalliokoski, Hilkka Timonen, Jarkko V. Niemi, Pauli Paasonen, Jenni Kontkanen, Yanjun Zhang, Heidi Hellén, Heino Kuuluvainen, Minna Aurela, Hanna E. Manninen, Mikko Sipilä, Topi Rönkkö, Tuukka Petäjä, Markku Kulmala, Miikka Dal Maso, and Mikael Ehn

Supplement

https://doi.org/10.5194/acp-23-12965-2023-supplement

Data sets

Measurement report: The influence of traffic and new particle formation on the size distribution of 1–800 nm particles in Helsinki: a street canyon and an urban background station comparison Magdalena Okuljar https://doi.org/10.5281/zenodo.4884875

Dataset from 'Influence of anthropogenic emissions on the composition of highly oxygenated organic molecules in Helsinki: a street canyon and urban background station comparison' Magdalena Okuljar, Olga Garmash, Miska Olin, Joni Kalliokoski, Hilkka Timonen, Jarkko V. Niemi, Pauli Paasonen, Jenni Kontkanen, Yanjun Zhang, Heidi Hellén, Heino Kuuluvainen, Mina Aurela, Hanna E. Manninen, Mikko Sipilä, Topi Rönkkö, Tuukka Petäjä, Markku Kulmala, Miikka Dal Maso, and Mikael Ehn https://doi.org/10.5281/zenodo.8273030

Smart-SMEAR: on-line data exploration and visualization tool for SMEAR stations SmartSMEAR https://smear.avaa.csc.fi/

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Highly oxygenated organic molecules (HOMs) form secondary organic aerosol that affects air quality and health. In this study, we demonstrate that in a moderately polluted city with abundant vegetation, the composition of HOMs is largely controlled by the effect of NO_x on the biogenic volatile organic compound oxidation. Comparing the results from two nearby stations, we show that HOM composition and formation pathways can change considerably within small distances in urban environments.