Differing mechanisms of new particle formation at two Arctic sites.

Lisa Beck, Nina Sarnela, Heikki Junninen, Clara J.M Hoppe, Olga Garmash, Federico Bianchi, Matthieu Riva, Clémence Rose, Otso Peräkylä, Daniela Wimmer, Oskari Kausiala, Tuija Jokinen, Lauri Ahonen, Jyri Mikkilä, Jani Hakala, Xu-Cheng He, Jenni Kontkanen, Klara.K.E Wolf, David Cappelletti, Mauro MazzolaRita Traversi, Chiara Petroselli, Angelo.p Viola, Vito Vitale, Robert Lange, Andreas Massling, Jakob k Nojgaard, Radovan Krejci, Linn Karlsson, Paul Zieger, Sehyun Jang, Kitack Lee, Ville Vakkari, Janne Lampilahti, Roseline Thakur, Katri Leino (os. Paananen), Juha Kangasluoma, Ella-Maria Duplissy (née Kyrö), Erkki Siivola, Marjan Marbouti, Yee Jun Tham, Alfonso Saiz-Lopez, Tuukka Petäjä, Mikael Ehn, Douglas Worsnop, Henrik Skov, Markku Kulmala, Veli-Matti Kerminen, Mikko Sipilä

Forskningsoutput: TidskriftsbidragBrevVetenskapligPeer review

Sammanfattning

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 NH3 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.

Originalspråkengelska
Artikelnummere2020GL091334
TidskriftGeophysical Research Letters
Volym48
Utgåva4
Antal sidor11
ISSN0094-8276
DOI
StatusPublicerad - 28 feb. 2021
MoE-publikationstypA1 Tidskriftsartikel-refererad

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