Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin
Lactic acid (LA) and glycolic acid (GA), which are low-molecular-weight hydroxyacids, were identified in the particle and gas phases within the marine atmospheric boundary layer over the western subarctic North Pacific. A major portion of LA (81%) and GA (57%) was present in the particulate phase, w...
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ftcopernicus:oai:publications.copernicus.org:bg24625 2023-05-15T18:28:25+02:00 Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin Miyazaki, Y. Sawano, M. Kawamura, K. 2018-09-27 application/pdf https://doi.org/10.5194/bg-11-4407-2014 https://www.biogeosciences.net/11/4407/2014/ eng eng doi:10.5194/bg-11-4407-2014 https://www.biogeosciences.net/11/4407/2014/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-11-4407-2014 2019-12-24T09:54:17Z Lactic acid (LA) and glycolic acid (GA), which are low-molecular-weight hydroxyacids, were identified in the particle and gas phases within the marine atmospheric boundary layer over the western subarctic North Pacific. A major portion of LA (81%) and GA (57%) was present in the particulate phase, which is consistent with the presence of a hydroxyl group in these molecules leading to the low volatility of the compounds. The average concentration (±SD) of LA in more biologically influenced marine aerosols (33 ± 58 ng m −3 ) was substantially higher than that in less biologically influenced aerosols (11 ± 12 ng m −3 ). Over the oceanic region of phytoplankton blooms, the concentration of aerosol LA was comparable to that of oxalic acid, which was the most abundant diacid during the study period. A positive correlation was found between the LA concentrations in more biologically influenced aerosols and chlorophyll a in seawater ( r 2 = 0.56), suggesting an important production of aerosol LA possibly associated with microbial (e.g., lactobacillus) activity in seawater and/or aerosols. Our finding provides a new insight into the poorly quantified microbial sources of marine organic aerosols (OAs) because such low-molecular-weight hydroxyacids are key intermediates for OA formation. Text Subarctic Copernicus Publications: E-Journals Pacific Biogeosciences 11 16 4407 4414 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Lactic acid (LA) and glycolic acid (GA), which are low-molecular-weight hydroxyacids, were identified in the particle and gas phases within the marine atmospheric boundary layer over the western subarctic North Pacific. A major portion of LA (81%) and GA (57%) was present in the particulate phase, which is consistent with the presence of a hydroxyl group in these molecules leading to the low volatility of the compounds. The average concentration (±SD) of LA in more biologically influenced marine aerosols (33 ± 58 ng m −3 ) was substantially higher than that in less biologically influenced aerosols (11 ± 12 ng m −3 ). Over the oceanic region of phytoplankton blooms, the concentration of aerosol LA was comparable to that of oxalic acid, which was the most abundant diacid during the study period. A positive correlation was found between the LA concentrations in more biologically influenced aerosols and chlorophyll a in seawater ( r 2 = 0.56), suggesting an important production of aerosol LA possibly associated with microbial (e.g., lactobacillus) activity in seawater and/or aerosols. Our finding provides a new insight into the poorly quantified microbial sources of marine organic aerosols (OAs) because such low-molecular-weight hydroxyacids are key intermediates for OA formation. |
format |
Text |
author |
Miyazaki, Y. Sawano, M. Kawamura, K. |
spellingShingle |
Miyazaki, Y. Sawano, M. Kawamura, K. Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
author_facet |
Miyazaki, Y. Sawano, M. Kawamura, K. |
author_sort |
Miyazaki, Y. |
title |
Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
title_short |
Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
title_full |
Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
title_fullStr |
Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
title_full_unstemmed |
Low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
title_sort |
low-molecular-weight hydroxyacids in marine atmospheric aerosol: evidence of a marine microbial origin |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-11-4407-2014 https://www.biogeosciences.net/11/4407/2014/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-11-4407-2014 https://www.biogeosciences.net/11/4407/2014/ |
op_doi |
https://doi.org/10.5194/bg-11-4407-2014 |
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Biogeosciences |
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11 |
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16 |
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4407 |
op_container_end_page |
4414 |
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1766210885222662144 |