Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer
International audience Oxalic and other small dicarboxylic acids have been reported as important water-soluble organic constituents of atmospheric aerosols from different environments. Their molecular distributions are generally characterized by the predominance of oxalic acid (C 2) followed by malo...
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ftunivaixmarseil:oai:HAL:hal-02000706v1 2023-12-31T10:00:18+01:00 Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer Kawamura, Kimitaka Ono, K. Tachibana, E. Charrìère, Bruno Sempere, Richard Institute of Low-Temperature Science Hokkaido University Sapporo, Japan Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.science/hal-02000706 https://hal.science/hal-02000706/document https://hal.science/hal-02000706/file/Kawa-et-al-Malina.pdf https://doi.org/10.5194/bg-9-4725-2012 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-9-4725-2012 hal-02000706 https://hal.science/hal-02000706 https://hal.science/hal-02000706/document https://hal.science/hal-02000706/file/Kawa-et-al-Malina.pdf doi:10.5194/bg-9-4725-2012 info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02000706 Biogeosciences, 2012, 9 (11), pp.4725-4737. ⟨10.5194/bg-9-4725-2012⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2012 ftunivaixmarseil https://doi.org/10.5194/bg-9-4725-2012 2023-12-05T23:42:08Z International audience Oxalic and other small dicarboxylic acids have been reported as important water-soluble organic constituents of atmospheric aerosols from different environments. Their molecular distributions are generally characterized by the predominance of oxalic acid (C 2) followed by malonic (C 3) and/or succinic (C 4) acids. In this study, we collected marine aerosols from the Arctic Ocean during late summer in 2009 when sea ice was retreating. The marine aerosols were analyzed for the molecular distributions of dicarboxylic acids as well as ketocarboxylic acids and α-dicarbonyls to better understand the source of water-soluble organics and their photochemical processes in the high Arctic marine atmosphere. We found that diacids are more abundant than ketoacids and α-dicarbonyls, but their concentrations are generally low (< 30 ng m −3), except for one sample (up to 70 ng m −3) that was collected near the mouth of Macken-zie River during clear sky condition. Although the molecular compositions of diacids are in general characterized by the predominance of oxalic acid, a depletion of C 2 was found in two samples in which C 4 became the most abundant. Similar depletion of oxalic acid has previously been reported in the Arctic aerosols collected at Alert after polar sunrise and in the summer aerosols from the coast of Antarctica. Because the marine aerosols that showed a depletion of C 2 were collected under the overcast and/or foggy conditions, we suggest that a photochemical decomposition of oxalic acid may have occurred in aqueous phase of aerosols over the Arctic Ocean via the photo dissociation of oxalate-Fe (III) complex. We also determined stable carbon isotopic compositions (δ 13 C) of bulk aerosol carbon and individual diacids. The δ 13 C of bulk aerosols showed −26.5 ‰ (range: −29.7 to −24.7 ‰), suggesting that marine aerosol carbon is derived from both terrestrial and marine organic materials. In contrast, oxalic acid showed much larger δ 13 C values (average: −20.9 ‰, range: −24.7 ‰ to ... Article in Journal/Newspaper Antarc* Antarctica Arctic Arctic Ocean Sea ice Aix-Marseille Université: HAL Biogeosciences 9 11 4725 4737 |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Kawamura, Kimitaka Ono, K. Tachibana, E. Charrìère, Bruno Sempere, Richard Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Oxalic and other small dicarboxylic acids have been reported as important water-soluble organic constituents of atmospheric aerosols from different environments. Their molecular distributions are generally characterized by the predominance of oxalic acid (C 2) followed by malonic (C 3) and/or succinic (C 4) acids. In this study, we collected marine aerosols from the Arctic Ocean during late summer in 2009 when sea ice was retreating. The marine aerosols were analyzed for the molecular distributions of dicarboxylic acids as well as ketocarboxylic acids and α-dicarbonyls to better understand the source of water-soluble organics and their photochemical processes in the high Arctic marine atmosphere. We found that diacids are more abundant than ketoacids and α-dicarbonyls, but their concentrations are generally low (< 30 ng m −3), except for one sample (up to 70 ng m −3) that was collected near the mouth of Macken-zie River during clear sky condition. Although the molecular compositions of diacids are in general characterized by the predominance of oxalic acid, a depletion of C 2 was found in two samples in which C 4 became the most abundant. Similar depletion of oxalic acid has previously been reported in the Arctic aerosols collected at Alert after polar sunrise and in the summer aerosols from the coast of Antarctica. Because the marine aerosols that showed a depletion of C 2 were collected under the overcast and/or foggy conditions, we suggest that a photochemical decomposition of oxalic acid may have occurred in aqueous phase of aerosols over the Arctic Ocean via the photo dissociation of oxalate-Fe (III) complex. We also determined stable carbon isotopic compositions (δ 13 C) of bulk aerosol carbon and individual diacids. The δ 13 C of bulk aerosols showed −26.5 ‰ (range: −29.7 to −24.7 ‰), suggesting that marine aerosol carbon is derived from both terrestrial and marine organic materials. In contrast, oxalic acid showed much larger δ 13 C values (average: −20.9 ‰, range: −24.7 ‰ to ... |
author2 |
Institute of Low-Temperature Science Hokkaido University Sapporo, Japan Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Kawamura, Kimitaka Ono, K. Tachibana, E. Charrìère, Bruno Sempere, Richard |
author_facet |
Kawamura, Kimitaka Ono, K. Tachibana, E. Charrìère, Bruno Sempere, Richard |
author_sort |
Kawamura, Kimitaka |
title |
Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
title_short |
Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
title_full |
Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
title_fullStr |
Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
title_full_unstemmed |
Distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the Arctic Ocean during late summer |
title_sort |
distributions of low molecular weight dicarboxylic acids, ketoacids and α-dicarbonyls in the marine aerosols collected over the arctic ocean during late summer |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-02000706 https://hal.science/hal-02000706/document https://hal.science/hal-02000706/file/Kawa-et-al-Malina.pdf https://doi.org/10.5194/bg-9-4725-2012 |
genre |
Antarc* Antarctica Arctic Arctic Ocean Sea ice |
genre_facet |
Antarc* Antarctica Arctic Arctic Ocean Sea ice |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02000706 Biogeosciences, 2012, 9 (11), pp.4725-4737. ⟨10.5194/bg-9-4725-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-9-4725-2012 hal-02000706 https://hal.science/hal-02000706 https://hal.science/hal-02000706/document https://hal.science/hal-02000706/file/Kawa-et-al-Malina.pdf doi:10.5194/bg-9-4725-2012 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-9-4725-2012 |
container_title |
Biogeosciences |
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9 |
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11 |
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4725 |
op_container_end_page |
4737 |
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