Atmospheric submicron aerosol composition and particulate organic nitrate formation in a boreal forestland-urban mixed region. Hao, L., Q., Kortelainen, A., Romakkaniemi, S., Portin, H., Jaatinen, A., Leskinen, A., Komppula, M., Miettinen, P., Sueper, D., Pajunoja, A., Smith, J., N., Lehtinen, K., E., Worsnop, D., R., Laaksonen, A., & Virtanen, A. Atmospheric Chemistry and Physics, 14(24):13483-13495, 12, 2014.
Atmospheric submicron aerosol composition and particulate organic nitrate formation in a boreal forestland-urban mixed region [link]Website  abstract   bibtex   
The Puijo aerosol-cloud observation station is a unique measurement site for its location in the mixed region between the boreal forestland and the municipality of Kuopio, Finland. A measurement campaign was carried out at the station during fall 2010. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-Tof-AMS) was deployed to characterize the atmospheric submicron aerosols. Positive matrix factorization (PMF) was applied to the unified high-resolution mass spectra organic species with NO+ and NO2+ ions to discover the intrinsic relationships between the organic and inorganic species and their daily cycles. On average, the submicron aerosols in this study were dominated by organic and sulfate species, composing 48.2 and 28.7% of total observed aerosol mass, respectively, with smaller contributions from ammonium (9.3%), nitrate (4.9%), chloride (0.8%) and BC (8.1%). The sources of these species included the primary emissions originating from the city area, secondary formation from both natural and anthropogenic emissions and regional transport. The PMF analysis succeeded in separating the mixed organic and inorganic spectra into three distinct organic and one inorganic factors. For organic factors, the semi-volatile oxygenated organic aerosol (SVOOA) and low-volatility oxygenated OA (LVOOA) accounted for 54.8 and 36.3% of total organic masses, respectively, while the hydrocarbon-like organic aerosol (HOA) accounted for 8.9% of total organics, with its main source from urban emissions. The inorganic factor is identified as NH4NO3, comprising 6.9% of the fitted aerosol mass by PMF. Based on the PMF results, the nitrate species were separated into organic and inorganic components, with the organic nitrates contributing one-third of the total nitrate mass. The results highlight both anthropogenic and biogenic emissions as important atmospheric aerosol sources in a forest-urban mixed region.
@article{
 title = {Atmospheric submicron aerosol composition and particulate organic nitrate formation in a boreal forestland-urban mixed region},
 type = {article},
 year = {2014},
 identifiers = {[object Object]},
 keywords = {chemical-composition,cloud interactions,emissions,high-resolution,hydrocarbon-like,mass-spectrometer,particle formation,positive matrix factorization,real plant,semiurban measurement station,source apportionment},
 pages = {13483-13495},
 volume = {14},
 websites = {http://www.atmos-chem-phys.net/14/13483/2014/},
 month = {12},
 day = {18},
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 notes = {ISI Document Delivery No.: AZ0TI<br/>Times Cited: 2<br/>Cited Reference Count: 48<br/>Hao, L. Q. Kortelainen, A. Romakkaniemi, S. Portin, H. Jaatinen, A. Leskinen, A. Komppula, M. Miettinen, P. Sueper, D. Pajunoja, A. Smith, J. N. Lehtinen, K. E. J. Worsnop, D. R. Laaksonen, A. Virtanen, A.<br/>UEF Postdoc Research Foundation [930275]; University of Eastern Finland; Academy of the Finland Centre of Excellence [272041]; European Recearch Council [335478]; US Department of Energy; US National Science Foundation<br/>This work was supported by the UEF Postdoc Research Foundation (no. 930275), strategic funding from the University of Eastern Finland and Academy of the Finland Centre of Excellence (grant no. 272041), European Recearch Council (Starting Grant 335478), S. Romakkaniemi and A. Virtanen acknowledge the Academy of Finland for the Academy Research Fellow positions (decisions 283031 and 252741). J. N. Smith acknowledges support from the US Department of Energy. The National Center for Atmospheric Research is sponsored by the US National Science Foundation.<br/>Copernicus gesellschaft mbh<br/>Gottingen},
 private_publication = {false},
 abstract = {The Puijo aerosol-cloud observation station is a unique measurement site for its location in the mixed region between the boreal forestland and the municipality of Kuopio, Finland. A measurement campaign was carried out at the station during fall 2010. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-Tof-AMS) was deployed to characterize the atmospheric submicron aerosols. Positive matrix factorization (PMF) was applied to the unified high-resolution mass spectra organic species with NO+ and NO2+ ions to discover the intrinsic relationships between the organic and inorganic species and their daily cycles. On average, the submicron aerosols in this study were dominated by organic and sulfate species, composing 48.2 and 28.7% of total observed aerosol mass, respectively, with smaller contributions from ammonium (9.3%), nitrate (4.9%), chloride (0.8%) and BC (8.1%). The sources of these species included the primary emissions originating from the city area, secondary formation from both natural and anthropogenic emissions and regional transport. The PMF analysis succeeded in separating the mixed organic and inorganic spectra into three distinct organic and one inorganic factors. For organic factors, the semi-volatile oxygenated organic aerosol (SVOOA) and low-volatility oxygenated OA (LVOOA) accounted for 54.8 and 36.3% of total organic masses, respectively, while the hydrocarbon-like organic aerosol (HOA) accounted for 8.9% of total organics, with its main source from urban emissions. The inorganic factor is identified as NH4NO3, comprising 6.9% of the fitted aerosol mass by PMF. Based on the PMF results, the nitrate species were separated into organic and inorganic components, with the organic nitrates contributing one-third of the total nitrate mass. The results highlight both anthropogenic and biogenic emissions as important atmospheric aerosol sources in a forest-urban mixed region.},
 bibtype = {article},
 author = {Hao, L. Q. and Kortelainen, A. and Romakkaniemi, S. and Portin, H. and Jaatinen, A. and Leskinen, A. and Komppula, M. and Miettinen, P. and Sueper, D. and Pajunoja, A. and Smith, J. N. and Lehtinen, K. E.J. and Worsnop, D. R. and Laaksonen, A. and Virtanen, A.},
 journal = {Atmospheric Chemistry and Physics},
 number = {24}
}

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