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Estimation of the long-range transport contribution from secondary inorganic components to urban background PM10 concentrations in south-western Sweden during 1986-2010

Artikel i vetenskaplig tidskrift
Författare L. Tang
Marie Haeger-Eugensson
K. Sjoberg
Janine Wichmann
Peter Molnár
Gerd Sällsten
Publicerad i Atmospheric Environment
Volym 89
Sidor 93-101
ISSN 1352-2310
Publiceringsår 2014
Publicerad vid Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa
Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa, enheten för arbets-och miljömedicin
Sidor 93-101
Språk en
Länkar dx.doi.org/10.1016/j.atmosenv.2014....
Ämnesord Long-range transport, Local contribution, Secondary inorganic aerosols, PM10, Transport clusters, PARTICULATE MATTER, ULTRAFINE PARTICLES, RESIDENTIAL OUTDOOR, GENERAL-POPULATION, AEROSOL-PARTICLES, STATISTICAL-MODEL, GASEOUS, MERCURY, FINE PARTICLES, AIR-POLLUTION, DISPERSION, Environmental Sciences, Meteorology & Atmospheric Sciences, ENVIRONMENTAL SCIENCES, METEOROLOGY & ATMOSPHERIC SCIENCES
Ämneskategorier Geovetenskap och miljövetenskap, Hälsovetenskaper

Sammanfattning

The contribution of long-range transported (LRT) to urban background PM10 concentrations was investigated from a long-term view from 1986 to 2010. Regional air concentrations of sulphate (SO42-), nitrate (NO3-), and ammonium (NH4+) were used as a sum (C-ion) to investigate the contribution from these ions to the LRT PM10 concentrations at an urban background site in Gothenburg, Sweden. Utilizing backwards trajectory analysis, the LRT contribution from C-ion to the urban background PM10 concentrations (LRTCion) was estimated for six unique transport pathways and related source areas. Air masses transported over eastern Europe, UK/North Sea/Denmark and the vicinity of Scandinavia were associated with high C-ion concentrations observed in Gothenburg. For each pathway, multiple linear models based on the C-ion concentrations were used to estimate LRTCion and PM10 at the urban background site. The performances of the multiple linear models were satisfying with R-2 between estimated and observed annual mean PM10 concentrations of 0.81 during the monitoring years 1990-2010. The models were able to describe the main features of the day-to-day average PM10 concentrations, but underestimated high level values. The annual estimated LRTCion contribution decreased from 7 +/- 2 mu g/m(3) for 1986-2000 to 5 +/- 1 mu g/m(3) for 2001-2010. The higher LRTCion contribution was related to the transport cluster from eastern Europe, UK/North Sea/Denmark and the vicinity of South Scandinavia. (C) 2014 Elsevier Ltd. All rights reserved.

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