Supplementary material to "Exploring the variability of aerosol particle composition in the Arctic: a study from the springtime ACCACIA campaign"

• Main Authors: Young, G., Jones, H. M., Darbyshire, E., Baustian, K. J., McQuaid, J. B., Bower, K. N., Connolly, P. J., Gallagher, M. W., Choularton, T. W.
• Format: Other/Unknown Material
• Language: unknown
• Published: Copernicus Gesellschaft mbH 2015
• Subjects: Arctic; Arctic Ocean; Greenland
• Online Access: https://research.manchester.ac.uk/en/publications/c51130ef-4199-45b5-a8be-f82977380b65; https://doi.org/10.5194/acpd-15-29403-2015-supplement

Single-particle compositional analysis of filter samples collected on-board the FAAM BAe-146 aircraft is presented for six flights during the springtime Aerosol-Cloud Coupling and Climate Interactions in the Arctic (ACCACIA) campaign (March–April 5 2013). Scanning electron microscopy was utilised to derive size distributions and sizesegregated particle compositions. These data were compared to corresponding data from wing-mounted optical particle counters and reasonable agreement between the calculated number size distributions was found. Significant variability in composition was observed, with differing external and internal mixing identified, between air mass 10 trajectory cases based on HYSPLIT analyses. Dominant particle classes were silicatebased dusts and sea salts, with particles notably rich in K and Ca detected in one case. Source regions varied from the Arctic Ocean and Greenland through to northern Russia and the European continent. Good agreement between the back trajectories was mirrored by comparable compositional trends between samples. Silicate dusts were 15 identified in all cases, and the elemental composition of the dust was consistent for all samples except one. It is hypothesised that long-range, high-altitude transport was primarily responsible for this dust, with likely sources including the Asian arid regions