Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ
Using a new approach that constrains thermodynamic modeling of aerosol composition with measured gas-to-particle partitioning of inorganic nitrate, we estimate the acidity levels for aerosol sampled in the South Korean planetary boundary layer during the NASA/NIER KORUS-AQ field campaign. The pH (me...
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Swiss Chemical Society
2024-11-01
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| Series: | CHIMIA |
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| Online Access: | https://www.chimia.ch/chimia/article/view/7422 |
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| author | Ifayoyinsola Ibikunle Andreas Beyersdorf Pedro Campuzano-Jost Chelsea Corr John D. Crounse Jack Dibb Glenn Diskin Greg Huey Jose-Luis Jimenez Michelle J. Kim Benjamin A. Nault Eric Scheuer Alex Teng Paul O. Wennberg Bruce Anderson James Crawford Rodney Weber Athanasios Nenes |
| author_facet | Ifayoyinsola Ibikunle Andreas Beyersdorf Pedro Campuzano-Jost Chelsea Corr John D. Crounse Jack Dibb Glenn Diskin Greg Huey Jose-Luis Jimenez Michelle J. Kim Benjamin A. Nault Eric Scheuer Alex Teng Paul O. Wennberg Bruce Anderson James Crawford Rodney Weber Athanasios Nenes |
| author_sort | Ifayoyinsola Ibikunle |
| collection | DOAJ |
| description | Using a new approach that constrains thermodynamic modeling of aerosol composition with measured gas-to-particle partitioning of inorganic nitrate, we estimate the acidity levels for aerosol sampled in the South Korean planetary boundary layer during the NASA/NIER KORUS-AQ field campaign. The pH (mean ± 1σ = 2.43±0.68) and aerosol liquid water content determined were then used to determine the ‘chemical regime’ of the inorganic fraction of particulate matter (PM) sensitivity to ammonia and nitrate availability. We found that the aerosol formation is always sensitive to HNO3 levels, especially in highly polluted regions, while it is only exclusively sensitive to NH3 in some rural/remote regions. Nitrate levels are further promoted because dry deposition velocity is low and allows its accumulation in the boundary layer. Because of this, HNO3 reductions achieved by NOX controls prove to be the most effective approach for all conditions examined, and that NH3 emissions can only partially affect PM reduction for the specific season and region. Despite the benefits of controlling PM formation to reduce ammonium-nitrate aerosol and PM mass, changes in the acidity domain can significantly affect other processes and sources of aerosol toxicity (e.g. solubilization of Fe, Cu and other metals) as well as the deposition patterns of these trace species and reactive nitrogen.
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| format | Article |
| id | doaj-art-3db0ede47cc648fbadfe7c9f31236d33 |
| institution | OA Journals |
| issn | 0009-4293 2673-2424 |
| language | deu |
| publishDate | 2024-11-01 |
| publisher | Swiss Chemical Society |
| record_format | Article |
| series | CHIMIA |
| spelling | doaj-art-3db0ede47cc648fbadfe7c9f31236d332025-08-20T02:29:51ZdeuSwiss Chemical SocietyCHIMIA0009-42932673-24242024-11-01781110.2533/chimia.2024.762Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQIfayoyinsola Ibikunle0 Andreas Beyersdorf1Pedro Campuzano-Jost2Chelsea Corr3John D. Crounse4Jack Dibb5Glenn Diskin6Greg Huey7 Jose-Luis Jimenez8Michelle J. Kim9Benjamin A. Nault10Eric Scheuer11Alex Teng12 Paul O. Wennberg13Bruce Anderson14James Crawford15Rodney Weber16Athanasios Nenes17https://orcid.org/0000-0003-3873-9970School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USANASA Langley Research Center, Hampton, VA 23681, USADepartment of Chemistry, University of Colorado, Boulder, CO 80309, USA; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USANASA Langley Research Center, Hampton, VA 23681, USA; Currently at Colorado State UniversityCalifornia Institute of Technology, Pasadena, CA 91125Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USANASA Ames Research Center, Moffett Field, CA 94035, USASchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USADepartment of Chemistry, University of Colorado, Boulder, CO 80309, USA; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USACalifornia Institute of Technology, Pasadena, CA 91125Department of Chemistry, University of Colorado, Boulder, CO 80309, USA; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA; Currently at Center for Aerosol and Cloud Chemistry, Aerodyne Research Inc., Billerica, MA, USAInstitute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USACalifornia Institute of Technology, Pasadena, CA 91125California Institute of Technology, Pasadena, CA 91125NASA Langley Research Center, Hampton, VA 23681, USANASA Langley Research Center, Hampton, VA 23681, USASchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USASchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA; School of Architecture, Civil & Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland; Center for the Study of Air Quality and Climate Change, Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, GR-26504, GreeceUsing a new approach that constrains thermodynamic modeling of aerosol composition with measured gas-to-particle partitioning of inorganic nitrate, we estimate the acidity levels for aerosol sampled in the South Korean planetary boundary layer during the NASA/NIER KORUS-AQ field campaign. The pH (mean ± 1σ = 2.43±0.68) and aerosol liquid water content determined were then used to determine the ‘chemical regime’ of the inorganic fraction of particulate matter (PM) sensitivity to ammonia and nitrate availability. We found that the aerosol formation is always sensitive to HNO3 levels, especially in highly polluted regions, while it is only exclusively sensitive to NH3 in some rural/remote regions. Nitrate levels are further promoted because dry deposition velocity is low and allows its accumulation in the boundary layer. Because of this, HNO3 reductions achieved by NOX controls prove to be the most effective approach for all conditions examined, and that NH3 emissions can only partially affect PM reduction for the specific season and region. Despite the benefits of controlling PM formation to reduce ammonium-nitrate aerosol and PM mass, changes in the acidity domain can significantly affect other processes and sources of aerosol toxicity (e.g. solubilization of Fe, Cu and other metals) as well as the deposition patterns of these trace species and reactive nitrogen. https://www.chimia.ch/chimia/article/view/7422Aerosol acidityAmbient measurementsNitrateThermodynamics |
| spellingShingle | Ifayoyinsola Ibikunle Andreas Beyersdorf Pedro Campuzano-Jost Chelsea Corr John D. Crounse Jack Dibb Glenn Diskin Greg Huey Jose-Luis Jimenez Michelle J. Kim Benjamin A. Nault Eric Scheuer Alex Teng Paul O. Wennberg Bruce Anderson James Crawford Rodney Weber Athanasios Nenes Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ CHIMIA Aerosol acidity Ambient measurements Nitrate Thermodynamics |
| title | Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ |
| title_full | Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ |
| title_fullStr | Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ |
| title_full_unstemmed | Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ |
| title_short | Fine Particle pH and Sensitivity to NH3 and HNO3 over South Korea During KORUS-AQ |
| title_sort | fine particle ph and sensitivity to nh3 and hno3 over south korea during korus aq |
| topic | Aerosol acidity Ambient measurements Nitrate Thermodynamics |
| url | https://www.chimia.ch/chimia/article/view/7422 |
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