Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign
There is a lack of knowledge of how biomass burning aerosols in the tropics age, including those in the fire-prone Northern Territory in Australia. This paper reports chemical characterization of fresh and aged aerosols monitored during the 1-month-long SAFIRED (Savannah Fires in the Early Dry Seaso...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/17/3945/2017/acp-17-3945-2017.pdf |
| _version_ | 1818148623182987264 |
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| author | A. Milic M. D. Mallet L. T. Cravigan J. Alroe Z. D. Ristovski P. Selleck S. J. Lawson J. Ward M. J. Desservettaz C. Paton-Walsh L. R. Williams M. D. Keywood B. Miljevic |
| author_facet | A. Milic M. D. Mallet L. T. Cravigan J. Alroe Z. D. Ristovski P. Selleck S. J. Lawson J. Ward M. J. Desservettaz C. Paton-Walsh L. R. Williams M. D. Keywood B. Miljevic |
| author_sort | A. Milic |
| collection | DOAJ |
| description | There is a lack of knowledge of how biomass burning
aerosols in the tropics age, including those in the fire-prone Northern
Territory in Australia. This paper reports chemical characterization of
fresh and aged aerosols monitored during the 1-month-long SAFIRED
(Savannah Fires in the Early Dry Season) field study, with an emphasis on
the chemical signature and aging of organic aerosols. The campaign took
place in June 2014 during the early dry season when the surface measurement
site, the Australian Tropical Atmospheric Research Station (ATARS), located
in the Northern Territory, was heavily influenced by thousands of wild and
prescribed bushfires. ATARS was equipped with a wide suite of
instrumentation for gaseous and aerosol characterization. A compact
time-of-flight aerosol mass spectrometer was deployed to monitor aerosol
chemical composition. Approximately 90 % of submicron non-refractory mass
was composed of organic material. Ozone enhancement in biomass burning
plumes indicated increased air mass photochemistry. The diversity in biomass
burning emissions was illustrated through variability in chemical signature
(e.g. wide range in f44, from 0.06 to 0.18) for five intense fire events.
The background particulate loading was characterized using positive matrix
factorization (PMF). A PMF-resolved BBOA (biomass burning organic aerosol)
factor comprised 24 % of the submicron non-refractory organic aerosol
mass, confirming the significance of fire sources. A dominant PMF factor,
OOA (oxygenated organic aerosol), made up 47 % of the sampled aerosol,
illustrating the importance of aerosol aging in the Northern Territory.
Biogenic isoprene-derived organic aerosol factor was the third significant
fraction of the background aerosol (28 %). |
| first_indexed | 2024-12-11T12:54:05Z |
| format | Article |
| id | doaj.art-cbc154efb5e142beb312c159db9505fa |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T12:54:05Z |
| publishDate | 2017-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-cbc154efb5e142beb312c159db9505fa2022-12-22T01:06:38ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-03-011763945396110.5194/acp-17-3945-2017Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaignA. Milic0M. D. Mallet1L. T. Cravigan2J. Alroe3Z. D. Ristovski4P. Selleck5S. J. Lawson6J. Ward7M. J. Desservettaz8C. Paton-Walsh9L. R. Williams10M. D. Keywood11B. Miljevic12International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaInternational Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaInternational Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaInternational Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaInternational Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaCSIRO Oceans and Atmosphere, Aspendale, Victoria, 3195, AustraliaCSIRO Oceans and Atmosphere, Aspendale, Victoria, 3195, AustraliaCSIRO Oceans and Atmosphere, Aspendale, Victoria, 3195, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Wollongong, New South Wales, 2522, AustraliaCentre for Atmospheric Chemistry, University of Wollongong, Wollongong, New South Wales, 2522, AustraliaAerodyne Research, Inc., Billerica, Massachusetts, 01821, USACSIRO Oceans and Atmosphere, Aspendale, Victoria, 3195, AustraliaInternational Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Queensland, 4000, AustraliaThere is a lack of knowledge of how biomass burning aerosols in the tropics age, including those in the fire-prone Northern Territory in Australia. This paper reports chemical characterization of fresh and aged aerosols monitored during the 1-month-long SAFIRED (Savannah Fires in the Early Dry Season) field study, with an emphasis on the chemical signature and aging of organic aerosols. The campaign took place in June 2014 during the early dry season when the surface measurement site, the Australian Tropical Atmospheric Research Station (ATARS), located in the Northern Territory, was heavily influenced by thousands of wild and prescribed bushfires. ATARS was equipped with a wide suite of instrumentation for gaseous and aerosol characterization. A compact time-of-flight aerosol mass spectrometer was deployed to monitor aerosol chemical composition. Approximately 90 % of submicron non-refractory mass was composed of organic material. Ozone enhancement in biomass burning plumes indicated increased air mass photochemistry. The diversity in biomass burning emissions was illustrated through variability in chemical signature (e.g. wide range in f44, from 0.06 to 0.18) for five intense fire events. The background particulate loading was characterized using positive matrix factorization (PMF). A PMF-resolved BBOA (biomass burning organic aerosol) factor comprised 24 % of the submicron non-refractory organic aerosol mass, confirming the significance of fire sources. A dominant PMF factor, OOA (oxygenated organic aerosol), made up 47 % of the sampled aerosol, illustrating the importance of aerosol aging in the Northern Territory. Biogenic isoprene-derived organic aerosol factor was the third significant fraction of the background aerosol (28 %).http://www.atmos-chem-phys.net/17/3945/2017/acp-17-3945-2017.pdf |
| spellingShingle | A. Milic M. D. Mallet L. T. Cravigan J. Alroe Z. D. Ristovski P. Selleck S. J. Lawson J. Ward M. J. Desservettaz C. Paton-Walsh L. R. Williams M. D. Keywood B. Miljevic Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign Atmospheric Chemistry and Physics |
| title | Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign |
| title_full | Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign |
| title_fullStr | Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign |
| title_full_unstemmed | Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign |
| title_short | Biomass burning and biogenic aerosols in northern Australia during the SAFIRED campaign |
| title_sort | biomass burning and biogenic aerosols in northern australia during the safired campaign |
| url | http://www.atmos-chem-phys.net/17/3945/2017/acp-17-3945-2017.pdf |
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