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- Title
Annual variability of ice nucleating particle concentrations at different Arctic locations.
- Authors
Heike Wex; Lin Huang; Wendy Zhang; Hayley Hung; Traversi, Rita; Becagli, Silvia; Sheesley, Rebecca J.; Moffett, Claire E.; Barrett, Tate E.; Bossi, Rossana; Skov, Henrik; Hünerbein, Anja; Lubitz, Jasmin; Löffler, Mareike; Linke, Olivia; Hartmann, Markus; Herenz, Paul; Stratmann, Frank
- Abstract
Number concentrations of ice nucleating particles (NINP) in the Arctic were derived from ground-based filter samples. Examined samples had been collected in Alert (Nunavut, Northern Canadian Archipelago on Ellesmere Island), Utqiagvik, formerly known as Barrow (Alaska), Ny Ålesund (Svalbard) and at the Villum Research Station (VRS, North Greenland). For the former two stations, examined filters span a full yearly cycle. For VRS, 10 weekly samples, mostly from different month of one year, were included. Samples from Ny Ålesund were collected during the months from March until September of one year. At all four stations, highest concentrations were found in the summer months from roughly June to September. For those stations with sufficient data coverage, an annual cycle can be seen. The spectra of NINP observed at the highest temperatures, i.e., those obtained for summer month, showed the presence of INP that nucleate ice up to - 5°C. It is know from literature that ice activivity observed at such high temperatures indicates the presence of ice active material of biogenic origin. Spectra observed at the lowest temperatures, i.e., those derived for winter month, were on the lower end of respective values reported in literature. An analysis concerning the origin of INP that were ice active at high temperatures was carried out, using back-trajectories and satellite information. Both, terrestrial locations in the Arctic and the adjacent sea were found to be possible source areas for highly active INP.
- Subjects
ARCTIC regions; NUCLEATING agents; METEOROLOGICAL satellites; ATMOSPHERIC temperature; METEOROLOGICAL stations
- Publication
Atmospheric Chemistry & Physics Discussions, 2018, p1
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acp-2018-1274