Atmospheric new particle formation characteristics in the Arctic as measured at Mount Zeppelin, Svalbard, from 2016 to 2018

• Published in: Atmospheric Chemistry and Physics
• Main Authors: H. Lee, K. Lee, C. R. Lunder, R. Krejci, W. Aas, J. Park, K.-T. Park, B. Y. Lee, Y. J. Yoon, K. Park
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2020
• Subjects: Physics; QC1-999; Chemistry; QD1-999; Arctic; Svalbard; Ny-Ålesund; Mount Zeppelin; Ny Ålesund
• Online Access: https://doi.org/10.5194/acp-20-13425-2020; https://doaj.org/article/882ac3819cd24158aa9cd75c633e0df5

We conducted continuous measurements of nanoparticles down to 3 nm size in the Arctic at Mount Zeppelin, Ny Ålesund, Svalbard, from October 2016 to December 2018, providing a size distribution of nanoparticles (3–60 nm). A significant number of nanoparticles as small as 3 nm were often observed during new particle formation (NPF), particularly in summer, suggesting that these were likely produced near the site rather than being transported from other regions after growth. The average NPF frequency per year was 23 %, having the highest percentage in August (63 %). The average formation rate ( J ) and growth rate (GR) for 3–7 nm particles were 0.04 cm −3 s −1 and 2.07 nm h −1 , respectively. Although NPF frequency in the Arctic was comparable to that in continental areas, the J and GR were much lower. The number of nanoparticles increased more frequently when air mass originated over the south and southwest ocean regions; this pattern overlapped with regions having strong chlorophyll a concentration and dimethyl sulfide (DMS) production capacity (southwest ocean) and was also associated with increased NH 3 and H 2 SO 4 concentration, suggesting that marine biogenic sources were responsible for gaseous precursors to NPF. Our results show that previously developed NPF occurrence criteria (low loss rate and high cluster growth rate favor NPF) are also applicable to NPF in the Arctic.