Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources
PM2.5 aerosols were collected at Fairbanks (64.51∘ N and 147.51∘ W) in central Alaska during the summer of 2009 and analyzed for organic tracer compounds using a gas chromatograph–mass spectrometer. The organic compounds were grouped into 14 classes based on their functional groups and sources. Conc...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00049535 2023-05-15T15:13:09+02:00 Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources Deshmukh, Dhananjay Kumar Haque, M. Mozammel Kim, Yongwon Kawamura, Kimitaka 2019-11 electronic https://doi.org/10.5194/acp-19-14009-2019 https://noa.gwlb.de/receive/cop_mods_00049535 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049154/acp-19-14009-2019.pdf https://acp.copernicus.org/articles/19/14009/2019/acp-19-14009-2019.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-19-14009-2019 https://noa.gwlb.de/receive/cop_mods_00049535 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049154/acp-19-14009-2019.pdf https://acp.copernicus.org/articles/19/14009/2019/acp-19-14009-2019.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2019 ftnonlinearchiv https://doi.org/10.5194/acp-19-14009-2019 2022-02-08T22:37:16Z PM2.5 aerosols were collected at Fairbanks (64.51∘ N and 147.51∘ W) in central Alaska during the summer of 2009 and analyzed for organic tracer compounds using a gas chromatograph–mass spectrometer. The organic compounds were grouped into 14 classes based on their functional groups and sources. Concentrations of the total organics measured ranged from 113 to 1664 ng m−3 (avg 535 ng m−3). Anhydrosugars (avg 186 ng m−3) and n-alkanoic acids (avg 185 ng m−3) were 2 major classes among the 14 compound classes. The similar temporal trends and strong positive correlations among anhydrosugars and n-alkanoic acids demonstrated that biomass burning (BB) is the major source of organic aerosols (OAs) in central Alaska. The dominance of higher molecular weight n-alkanoic acids over lower molecular weight homologs and their carbon preference index (5.6–9.8) confirmed that they were mostly emitted from plant waxes during BB in central Alaska. The mass concentration ratios of levoglucosan to mannosan denoted that softwood is the main biomass burned. The rainfall event distinctly enhanced the levels of mannitol and arabitol due to the growth of fungi and active discharge of fungal spores in the subarctic region. Molecular compositions of biogenic secondary organic aerosol (BSOA) tracers inferred that isoprene is a crucial precursor of BSOA over central Alaska. Our results suggest forest fires and plant emissions to be the crucial factors controlling the levels and molecular composition of OAs in central Alaska. We propose that PM2.5 laden with OAs derived in central Alaska may significantly impact the air quality and climate in the Arctic via long-range atmospheric transport. Article in Journal/Newspaper Arctic Subarctic Alaska Niedersächsisches Online-Archiv NOA Arctic Fairbanks Atmospheric Chemistry and Physics 19 22 14009 14029 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Deshmukh, Dhananjay Kumar Haque, M. Mozammel Kim, Yongwon Kawamura, Kimitaka Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
topic_facet |
article Verlagsveröffentlichung |
description |
PM2.5 aerosols were collected at Fairbanks (64.51∘ N and 147.51∘ W) in central Alaska during the summer of 2009 and analyzed for organic tracer compounds using a gas chromatograph–mass spectrometer. The organic compounds were grouped into 14 classes based on their functional groups and sources. Concentrations of the total organics measured ranged from 113 to 1664 ng m−3 (avg 535 ng m−3). Anhydrosugars (avg 186 ng m−3) and n-alkanoic acids (avg 185 ng m−3) were 2 major classes among the 14 compound classes. The similar temporal trends and strong positive correlations among anhydrosugars and n-alkanoic acids demonstrated that biomass burning (BB) is the major source of organic aerosols (OAs) in central Alaska. The dominance of higher molecular weight n-alkanoic acids over lower molecular weight homologs and their carbon preference index (5.6–9.8) confirmed that they were mostly emitted from plant waxes during BB in central Alaska. The mass concentration ratios of levoglucosan to mannosan denoted that softwood is the main biomass burned. The rainfall event distinctly enhanced the levels of mannitol and arabitol due to the growth of fungi and active discharge of fungal spores in the subarctic region. Molecular compositions of biogenic secondary organic aerosol (BSOA) tracers inferred that isoprene is a crucial precursor of BSOA over central Alaska. Our results suggest forest fires and plant emissions to be the crucial factors controlling the levels and molecular composition of OAs in central Alaska. We propose that PM2.5 laden with OAs derived in central Alaska may significantly impact the air quality and climate in the Arctic via long-range atmospheric transport. |
format |
Article in Journal/Newspaper |
author |
Deshmukh, Dhananjay Kumar Haque, M. Mozammel Kim, Yongwon Kawamura, Kimitaka |
author_facet |
Deshmukh, Dhananjay Kumar Haque, M. Mozammel Kim, Yongwon Kawamura, Kimitaka |
author_sort |
Deshmukh, Dhananjay Kumar |
title |
Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
title_short |
Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
title_full |
Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
title_fullStr |
Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
title_full_unstemmed |
Organic tracers of fine aerosol particles in central Alaska: summertime composition and sources |
title_sort |
organic tracers of fine aerosol particles in central alaska: summertime composition and sources |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/acp-19-14009-2019 https://noa.gwlb.de/receive/cop_mods_00049535 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049154/acp-19-14009-2019.pdf https://acp.copernicus.org/articles/19/14009/2019/acp-19-14009-2019.pdf |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Subarctic Alaska |
genre_facet |
Arctic Subarctic Alaska |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-19-14009-2019 https://noa.gwlb.de/receive/cop_mods_00049535 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00049154/acp-19-14009-2019.pdf https://acp.copernicus.org/articles/19/14009/2019/acp-19-14009-2019.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-19-14009-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
22 |
container_start_page |
14009 |
op_container_end_page |
14029 |
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1766343740137406464 |