Arctic primary aerosol production strongly influenced by riverine organic matter

Jiyeon Park, Manuel Dall'Osto, Kihong Park, Jung Hyun Kim, Jongkwan Park, Ki Tae Park, Chung Yeon Hwang, Gwang Il Jang, Yeontae Gim, Sujin Kang, Sanghun Park, Yong Keun Jin, Seong Soo Yum, Rafel Simó, Young Jun Yoon

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5 Citations (Scopus)

Abstract

The sources of primary and secondary aerosols in the Arctic are still poorly known. A number of surface seawater samples - with varying degrees of Arctic riverine and sea ice influences - were used in a sea spray generation chamber to test them for their potential to produce sea spray aerosols (SSA) and cloud condensation nuclei (CCN). Our interdisciplinary data showed that both sea salt and organic matter (OM) significantly influenced the SSA production. The number concentration of SSA in the coastal samples was negatively correlated with salinity and positively correlated with a number of OM tracers, including dissolved and chromophoric organic carbon (DOC, CDOM), marine microgels and chlorophyll a (Chl-a) but not for viral and bacterial abundances; indicating that OM of riverine origin enhances primary aerosol production. When all samples were considered, transparent exopolymer particles (TEP) were found to be the best indicator correlating positively with the ratio number concentration of SSA/salinity. CCN efficiency was not observed to differ between the SSA from the various samples, despite differences in organic characteristics. It is suggested that the large amount of freshwater from river runoff have a substantial impact on primary aerosols production mechanisms, possibly affecting the cloud radiative forcing.

Original languageEnglish
Pages (from-to)8621-8630
Number of pages10
JournalEnvironmental Science and Technology
Volume53
Issue number15
DOIs
Publication statusPublished - 2019 Aug 6

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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  • Cite this

    Park, J., Dall'Osto, M., Park, K., Kim, J. H., Park, J., Park, K. T., Hwang, C. Y., Jang, G. I., Gim, Y., Kang, S., Park, S., Jin, Y. K., Yum, S. S., Simó, R., & Yoon, Y. J. (2019). Arctic primary aerosol production strongly influenced by riverine organic matter. Environmental Science and Technology, 53(15), 8621-8630. https://doi.org/10.1021/acs.est.9b03399