Biogenic and anthropogenic sources of aerosols at the High Arctic site Villum Research Station

摘要: Abstract. There are limited measurements of the chemical composition, abundance and sources atmospheric particles in High Arctic To address this, we report 93 d soot particle aerosol mass spectrometer (SP-AMS) data collected from 20 February to 23 May 2015 at Villum Research Station (VRS) northern Greenland (81 ∘ 36 ′  N). During this period, observed Arctic haze phenomenon with elevated PM1 concentrations ranging an average of 2.3, 2.3 3.3  µ g m −3 February, March April, respectively, 1.2  May. Particulate sulfate ( SO 4 2 - ) accounted for 66 % non-refractory highest concentration until the end April decreasing The second most abundant species was organic (OA) (24 %). Both OA , estimated sum of all species, showed a marked decrease throughout May in accordance polar front moving north, together changes in aerosol removal processes. refractory black carbon (rBC) concentrations were found first month campaign, averaging 0.2  . In rBC averaged 0.1  while 0.02  Positive matrix factorization (PMF) mass spectra yielded three factors: (1) a hydrocarbon-like organic (HOA) factor, which was dominated by primary aerosols accounted for 12 % mass, (2) an Arctic haze (AOA) factor (3) a more oxygenated marine organic (MOA) factor. AOA dominated until mid-April (64 %–81 % of OA), being nearly absent correlated significantly suggesting main part that factor is secondary OA. MOA emerged late March, where it increased solar radiation reduced sea ice extent OA for rest campaign (24 %–74 % while AOA was absent. O∕C ratio (0.95) S∕C (0.011) was MOA. Our support current understanding Arctic aerosols highly influenced formation receives an important contribution marine emissions during spring remote High areas. view changing climate changing sea-ice extent, biogenic processes corresponding source strengths, highly time-resolved needed order elucidate components dominating enhance the processes taking place.