Abstract
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
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
| Original language | Undefined |
|---|---|
| Publisher | Copernicus Gesellschaft mbH |
| Volume | 15 |
| DOIs | |
| Publication status | Published - 29 Oct 2015 |