DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION
Antarctic aerosol samples collected from Syowa Station were studied for the molecular distributions of saturated and unsaturated monocarboxylic acids, α, ω-dicarboxylic acids and oxocarboxylic acids using capillary gas chromatography (GC) and GC/mass spectrometry (GC/MS). Normal saturated monocarbox...
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ftnipr:oai:nipr.repo.nii.ac.jp:00003948 2023-05-15T13:49:01+02:00 DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION ニシキオリ ムツミ カワムラ キミタカ ハヤシ マサヒコ Mutsumi NISHIKIORI Kimitaka KAWAMURA Masahiko HAYASHI 1996-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3948 http://id.nii.ac.jp/1291/00003948/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3948&item_no=1&attribute_id=18&file_no=1 en eng ABSTRACT Department of Chemistry, Faculty of Science, Tokyo Metropolitan University Department of Chemistry, Faculty of Science, Tokyo Metropolitan University:(Present address)Institute of Low Temperature Science, Hokkaido University Solar-Terrestrial Environment Laboratory, Nagoya University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3948 http://id.nii.ac.jp/1291/00003948/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 10, 163(1996-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3948&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1996 ftnipr 2022-12-31T19:49:35Z Antarctic aerosol samples collected from Syowa Station were studied for the molecular distributions of saturated and unsaturated monocarboxylic acids, α, ω-dicarboxylic acids and oxocarboxylic acids using capillary gas chromatography (GC) and GC/mass spectrometry (GC/MS). Normal saturated monocarboxylic acids were detected in the range of C_8-C_<28> (3.4-8.1 (ngm)^<-3>). Their distribution showed a maximum at C_<16> with an even carbon number predominance, except for C_9 which was more abundant than C_8 and C_<10>. The lower molecular weight (C_<12>-C_<19>) monocarboxylic acids dominate in the Antarctic aerosols, suggesting that the organic aerosols mainly orginate from marine organisms through sea-to-air emissions and subsequent atmospheric transport over Antarctica. However, unsaturated monocarboxylic acids (C_<16 : 1>, C_<18 : 1>; 0.40-0.91 (ngm)^<-3>), which are much more abundant than the saturated ones in marine algae and sea surface microlayers, were detected at relatively low concentrations. Depletion of unsaturated acids in the aerosols can be explained by selective photochemical degradation of the acids in the atmosphere. This is consistent with the relatively abundant presence of C_9 monoacid, which is a photooxidation product of unsaturated fatty acids such as oleic acid. The depletion of unsaturated fatty acids is also supported by the abundant presence of C_9α, ω-dicarboxylic acid (azelaic acid), which is a specific counterpart of photooxidation of unsaturated fatty acid containing a double bond predominantly at the C-9 position. Relative abundance of azelaic acid carbon content in total aerosol carbon content (TC) was found to be positively correlated with solar radiation, suggesting that the photochemical transformation of the Antarctic aerosols is intensified in summer. Mid-chain oxocarboxylic acids (4-oxooctanoic and 4-oxononanoic acids; 0.4-1.0 (ngm)^<-3>) were also detected in the Antarctic aerosols. We propose that mid-chain ... Report Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology National Institute of Polar Research Repository, Japan Antarctic The Antarctic Syowa Station |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
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English |
description |
Antarctic aerosol samples collected from Syowa Station were studied for the molecular distributions of saturated and unsaturated monocarboxylic acids, α, ω-dicarboxylic acids and oxocarboxylic acids using capillary gas chromatography (GC) and GC/mass spectrometry (GC/MS). Normal saturated monocarboxylic acids were detected in the range of C_8-C_<28> (3.4-8.1 (ngm)^<-3>). Their distribution showed a maximum at C_<16> with an even carbon number predominance, except for C_9 which was more abundant than C_8 and C_<10>. The lower molecular weight (C_<12>-C_<19>) monocarboxylic acids dominate in the Antarctic aerosols, suggesting that the organic aerosols mainly orginate from marine organisms through sea-to-air emissions and subsequent atmospheric transport over Antarctica. However, unsaturated monocarboxylic acids (C_<16 : 1>, C_<18 : 1>; 0.40-0.91 (ngm)^<-3>), which are much more abundant than the saturated ones in marine algae and sea surface microlayers, were detected at relatively low concentrations. Depletion of unsaturated acids in the aerosols can be explained by selective photochemical degradation of the acids in the atmosphere. This is consistent with the relatively abundant presence of C_9 monoacid, which is a photooxidation product of unsaturated fatty acids such as oleic acid. The depletion of unsaturated fatty acids is also supported by the abundant presence of C_9α, ω-dicarboxylic acid (azelaic acid), which is a specific counterpart of photooxidation of unsaturated fatty acid containing a double bond predominantly at the C-9 position. Relative abundance of azelaic acid carbon content in total aerosol carbon content (TC) was found to be positively correlated with solar radiation, suggesting that the photochemical transformation of the Antarctic aerosols is intensified in summer. Mid-chain oxocarboxylic acids (4-oxooctanoic and 4-oxononanoic acids; 0.4-1.0 (ngm)^<-3>) were also detected in the Antarctic aerosols. We propose that mid-chain ... |
format |
Report |
author |
ニシキオリ ムツミ カワムラ キミタカ ハヤシ マサヒコ Mutsumi NISHIKIORI Kimitaka KAWAMURA Masahiko HAYASHI |
spellingShingle |
ニシキオリ ムツミ カワムラ キミタカ ハヤシ マサヒコ Mutsumi NISHIKIORI Kimitaka KAWAMURA Masahiko HAYASHI DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
author_facet |
ニシキオリ ムツミ カワムラ キミタカ ハヤシ マサヒコ Mutsumi NISHIKIORI Kimitaka KAWAMURA Masahiko HAYASHI |
author_sort |
ニシキオリ ムツミ |
title |
DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
title_short |
DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
title_full |
DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
title_fullStr |
DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
title_full_unstemmed |
DISTRIBUTIONS OF LIPID CLASS COMPOUNDS IN ANTARCTIC AEROSOLS COLLECTED AT SYOWA STATION |
title_sort |
distributions of lipid class compounds in antarctic aerosols collected at syowa station |
publisher |
ABSTRACT |
publishDate |
1996 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3948 http://id.nii.ac.jp/1291/00003948/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3948&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic The Antarctic Syowa Station |
geographic_facet |
Antarctic The Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
genre_facet |
Antarc* Antarctic Antarctica Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3948 http://id.nii.ac.jp/1291/00003948/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 10, 163(1996-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3948&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250450503335936 |