Differing Mechanisms of New Particle Formation at Two Arctic Sites

• Published in: Geophysical Research Letters
• Main Authors: Beck, Lisa J., Sarnela, Nina, Junninen, Heikki, Hoppe, C. J. M., Garmash, Olga, Bianchi, Federico, Riva, Matthieu, Rose, C., Peräkylä, Otso, Wimmer, Daniela, Kausiala, Oskari, Jokinen, Tuija, Ahonen, Lauri, Mikkilä, Jyri, Hakala, Jani, He, Xu-Cheng, Kontkanen, Jenni, Wolf, Klara K.E., Cappelletti, David, Mazzola, Mauro, Traversi, Rita, Petroselli, Chiara, Viola, Angelo P., Vitale, Vito, Lange, R., Massling, Andreas, Nøjgaard, Jacob Klenø, Krejci, Radovan, Karlsson, L., Zieger, Paul, Jang, Sehyun, Lee, Kitack, Vakkari, Ville, Lampilaht, Janne, Thakur, Roseline, C., Leino, Katri, Kangasluoma, Juha, Duplissy, Ella-Maria, Siivola, Erkki, Marbouti, Marjan, Tham, Yee Jun, Saiz-Lopez, A., Petäjä, Tuukka, Ehn, Mikael, Worsnop, Douglas R., Skov, Henrik, Kulmala, Markku, Kerminen, Veli Matti, Sipilä, Mikko
• Other Authors: European Commission, Academy of Finland, Austrian Science Fund, National Science Foundation (US), Knut and Alice Wallenberg Foundation, Swedish Research Council, Consiglio Nazionale delle Ricerche, Ministero dell'Istruzione, dell'Università e della Ricerca, University of Helsinki, Aarhus University Research Foundation
• Format: Other/Unknown Material
• Language: unknown
• Published: American Geophysical Union 2020
• Subjects: Arctic; Svalbard; Climate change
• Online Access: http://hdl.handle.net/10261/254352; https://doi.org/10.1029/2020GL091334; https://doi.org/10.13039/501100002739; https://doi.org/10.13039/501100002341; https://doi.org/10.13039/501100002428; https://doi.org/10.13039/501100004462; https://doi.org/10.13039/501100000780; https://doi.org/10.13039/501100004063; https://doi.org/10.13039/501100003407; https://doi.org/10.13039/100000001

11 pags., 4 figs. New particle formation in the Arctic atmosphere is an important source of aerosol particles. Understanding the processes of Arctic secondary aerosol formation is crucial due to their significant impact on cloud properties and therefore Arctic amplification. We observed the molecular formation of new particles from low-volatility vapors at two Arctic sites with differing surroundings. In Svalbard, sulfuric acid (SA) and methane sulfonic acid (MSA) contribute to the formation of secondary aerosol and to some extent to cloud condensation nuclei (CCN). This occurs via ion-induced nucleation of SA and NH and subsequent growth by mainly SA and MSA condensation during springtime and highly oxygenated organic molecules during summertime. By contrast, in an ice-covered region around Villum, we observed new particle formation driven by iodic acid but its concentration was insufficient to grow nucleated particles to CCN sizes. Our results provide new insight about sources and precursors of Arctic secondary aerosol particles. The authors acknowledge European Research Council (GASPARCON, Grant no. 714621 and COALA, Grant no. 638703), Academy of Finland (Project nos. 296628, 306853, 317380, 316114, and 320094), INTERACT, European Regional Development Fund (project MOBTT42), Austrian Science Fund (FWF, Project J3951-N36), the European Union's Horizon 2020 Research and Innovation Program (Grant no. 689443) via project iCUPE (Integrative and Comprehensive Understanding on Polar Environments) and Project ERC-2016- COG 726349 CLIMAHAL, National Research Foundation (NRF) of the Ministry of Science, ICT and Future Planning (NRF-2018R1A2A1A19019281), Knut-and-Alice-Wallenberg Foundation within the Arctic Climate Across Scales (Project No. \,2016.0024), the Swedish EPA's (Naturvårdsverket) Environmental monitoring program (Miljöövervakning), the Swedish Research Council FORMAS (Project "Interplay between water, clouds and Aerosols in the Arctic," \# 2016-01427), Climate Change Tower – Integrated Project of the ...