Vertical Profiles and Chemical Properties of Aerosol Particles upon Ny-Ålesund (Svalbard Islands)

Figure 2

Clustered 5 d back-trajectories (BTs) for Apr 18 (a) and Apr 29 (b), 2011, calculated every 1 h using the NOAA HYSPLIT transport model [18]; meteorological data fields supplied by the ARL (Air Resources Lab, http://ready.arl.noaa.gov/gdas1.php) archiving programs input data. Endpoints are located above Ny-Ålesund at 500 m, 1000 m, and 1500 m agl.

(a)

(b)