Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015
<p>Recurring transboundary haze from Indonesian wildfires in previous decades significantly elevated particulate matter (PM) concentrations in Southeast Asia. During that event on 10 to 31 October 2015, we conducted a real-time observation of non-refractory submicron PM (NR-PM<sub>1&l...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/16481/2018/acp-18-16481-2018.pdf |
| _version_ | 1819296457219375104 |
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| author | S. H. Budisulistiorini M. Riva M. Riva M. Williams T. Miyakawa J. Chen M. Itoh J. D. Surratt M. Kuwata M. Kuwata M. Kuwata M. Kuwata |
| author_facet | S. H. Budisulistiorini M. Riva M. Riva M. Williams T. Miyakawa J. Chen M. Itoh J. D. Surratt M. Kuwata M. Kuwata M. Kuwata M. Kuwata |
| author_sort | S. H. Budisulistiorini |
| collection | DOAJ |
| description | <p>Recurring transboundary haze from Indonesian wildfires in previous
decades significantly elevated particulate matter (PM) concentrations in
Southeast Asia. During that event on 10 to 31 October 2015, we conducted a
real-time observation of non-refractory submicron PM (NR-PM<sub>1</sub>) in
Singapore using an Aerodyne aerosol mass spectrometer. Simultaneously, we
characterized carbonaceous components and organic aerosol (OA) tracers from
fine PM (PM<sub>2.5</sub>) samples to support source apportionment of the online
measurements. The real-time analysis demonstrated that OA accounted for
approximately 80 % of NR-PM<sub>1</sub> mass during the wildfire haze period.
Source apportionment analysis applied to the OA mass spectra using the
multilinear-engine (ME-2) approach resulted in four factors: hydrocarbon-like
OA (HOA), biomass burning OA (BBOA), peat burning OA (PBOA), and oxygenated
OA (OOA). The OOA can be considered as a surrogate of both secondary organic
aerosol (SOA) and oxidized primary organic aerosol (OPOA), while the other
factors are considered as surrogates of primary organic aerosol (POA). The
OOA accounted for approximately 50 % of the total OA mass in NR-PM<sub>1</sub>,
while POA subtypes from wildfires (BBOA and PBOA) contributed to
approximately 30 % of the total OA mass. Our findings highlight the
importance of atmospheric chemical processes, which likely include POA
oxidation and SOA formation from oxidation of gaseous precursors, to the OOA
concentration. As this research could not separately quantify the POA
oxidation and SOA formation processes, further studies should attempt to
investigate the contribution of gaseous precursor oxidation and POA aging to
the OOA formation in wildfire plumes.</p> |
| first_indexed | 2024-12-24T04:58:25Z |
| format | Article |
| id | doaj.art-beb0eda1ce494dbdaa264d5fd2929a4d |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-24T04:58:25Z |
| publishDate | 2018-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-beb0eda1ce494dbdaa264d5fd2929a4d2022-12-21T17:14:19ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-11-0118164811649810.5194/acp-18-16481-2018Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015S. H. Budisulistiorini0M. Riva1M. Riva2M. Williams3T. Miyakawa4J. Chen5M. Itoh6J. D. Surratt7M. Kuwata8M. Kuwata9M. Kuwata10M. Kuwata11Earth Observatory of Singapore, Nanyang Technological University, Singapore 639798, SingaporeDepartment of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USAnow at: the Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, 69626, Villeurbanne, FranceDepartment of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USAResearch and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Kanagawa 236-0001, JapanEarth Observatory of Singapore, Nanyang Technological University, Singapore 639798, SingaporeCenter for Southeast Asian Studies, Kyoto University, Kyoto 6068501, JapanDepartment of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USAEarth Observatory of Singapore, Nanyang Technological University, Singapore 639798, SingaporeCenter for Southeast Asian Studies, Kyoto University, Kyoto 6068501, JapanCampus for Research Excellence and Technological Enterprise (CREATE), Singapore 138602, SingaporeAsian School of the Environment, Nanyang Technological University, Singapore 639798, Singapore<p>Recurring transboundary haze from Indonesian wildfires in previous decades significantly elevated particulate matter (PM) concentrations in Southeast Asia. During that event on 10 to 31 October 2015, we conducted a real-time observation of non-refractory submicron PM (NR-PM<sub>1</sub>) in Singapore using an Aerodyne aerosol mass spectrometer. Simultaneously, we characterized carbonaceous components and organic aerosol (OA) tracers from fine PM (PM<sub>2.5</sub>) samples to support source apportionment of the online measurements. The real-time analysis demonstrated that OA accounted for approximately 80 % of NR-PM<sub>1</sub> mass during the wildfire haze period. Source apportionment analysis applied to the OA mass spectra using the multilinear-engine (ME-2) approach resulted in four factors: hydrocarbon-like OA (HOA), biomass burning OA (BBOA), peat burning OA (PBOA), and oxygenated OA (OOA). The OOA can be considered as a surrogate of both secondary organic aerosol (SOA) and oxidized primary organic aerosol (OPOA), while the other factors are considered as surrogates of primary organic aerosol (POA). The OOA accounted for approximately 50 % of the total OA mass in NR-PM<sub>1</sub>, while POA subtypes from wildfires (BBOA and PBOA) contributed to approximately 30 % of the total OA mass. Our findings highlight the importance of atmospheric chemical processes, which likely include POA oxidation and SOA formation from oxidation of gaseous precursors, to the OOA concentration. As this research could not separately quantify the POA oxidation and SOA formation processes, further studies should attempt to investigate the contribution of gaseous precursor oxidation and POA aging to the OOA formation in wildfire plumes.</p>https://www.atmos-chem-phys.net/18/16481/2018/acp-18-16481-2018.pdf |
| spellingShingle | S. H. Budisulistiorini M. Riva M. Riva M. Williams T. Miyakawa J. Chen M. Itoh J. D. Surratt M. Kuwata M. Kuwata M. Kuwata M. Kuwata Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 Atmospheric Chemistry and Physics |
| title | Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 |
| title_full | Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 |
| title_fullStr | Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 |
| title_full_unstemmed | Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 |
| title_short | Dominant contribution of oxygenated organic aerosol to haze particles from real-time observation in Singapore during an Indonesian wildfire event in 2015 |
| title_sort | dominant contribution of oxygenated organic aerosol to haze particles from real time observation in singapore during an indonesian wildfire event in 2015 |
| url | https://www.atmos-chem-phys.net/18/16481/2018/acp-18-16481-2018.pdf |
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