抄録
VOCs and aerosols measurements were conducted at Barrow, Alaska, USA from July, 1999 to July, 2001, to obtain their seasonal variation. Heavy metals, EC and sulfate concentration showed minimum in summer and autumn, and maximum in winter and spring, which is a character of Arctic Haze. Some VOCs (Xylene etc.) also showed the same seasonal variation, which suggest that VOCs are the component of Arctic Haze.
Source contributions of aerosols samples at Barrow were estimated by using a new type of factor analysis, positive matrix factorization (PMF). The PMF analysis identified three factors that indicate three aerosol sources contribute to aerosol concentrations at Barrow. The first factor was considered to represent sea salt, and remaining two factors were considered to represent anthropogenic sources.
To verify a difference in transport pathways between sampling periods, 5day backward trajectories were constructed. In winter and spring, some trajectories indicated long-range transport from emission sources in Eurasia. It was thus considered that long-range transport from emission sources in Eurasia was one of the causes of Arctic Haze at Barrow.
