HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND
Homologs of normal and branched chain saturated fatty acids, as well as unsaturated fatty acids, were determined in an ice core (205m long) taken from Site-J, Greenland using capillary gas chromatography and mass spectrometry. Molecular distributions of normal saturated fatty acids (C_8-C_<32>...
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Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
1995
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ftnipr:oai:nipr.repo.nii.ac.jp:00003874 2023-05-15T16:25:53+02:00 HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND カワムラ キミタカ スズキ イクコ フジイ ヨシユキ ワタナベ オキツグ Kimitaka KAWAMURA Ikuko SUZUKI Yoshiyuki FUJII Okitsugu WATANABE 1995-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3874 http://id.nii.ac.jp/1291/00003874/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3874&item_no=1&attribute_id=18&file_no=1 en eng Department of Chemistry, Faculty of Science, Tokyo Metropolitan University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3874 http://id.nii.ac.jp/1291/00003874/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 9, 1-11(1995-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3874&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1995 ftnipr 2022-12-17T19:45:54Z Homologs of normal and branched chain saturated fatty acids, as well as unsaturated fatty acids, were determined in an ice core (205m long) taken from Site-J, Greenland using capillary gas chromatography and mass spectrometry. Molecular distributions of normal saturated fatty acids (C_8-C_<32>) were characterized by an even carbon number predominance with two maxima at C_<16> and C_<24> or C_<22>, suggesting that they are transported long range through the atmosphere over Greenland from both marine and continental biological sources. Unsaturated fatty acids (C_<14>-C_<22>) were abundantly detected in the ice samples with oleic acid (C_<18 : 1>) being predominant. This is in contrast to the remote marine aerosols in which unsaturated fatty acids are depleted due to photochemical oxidation, suggesting that the fatty acids settled down in the Greenland ice sheet without serious photochemical degradation during atmospheric transport. Concentrations of the fatty acids (C_<12>-C_<32>) in the ice core fluctuated in the range of 3.9-104μg/kg-ice with higher values at around 1800,1900-1950,and 1980 AD. Relative abundances of the higher molecular weight fatty acids (C_<20>-C_<32>) were higher (10-30% of total fatty acids) in 1700-1850 AD, and lower (5-8%) in 1920-1950 AD. These results suggest that atmospheric transport of continentally derived materials over Greenland was relatively enhanced in 1700-1850 AD, whereas the transport of marine derived organic matter was significantly intensified in 1920-1950 AD. Report Greenland ice core Ice Sheet Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology National Institute of Polar Research Repository, Japan Greenland |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
Homologs of normal and branched chain saturated fatty acids, as well as unsaturated fatty acids, were determined in an ice core (205m long) taken from Site-J, Greenland using capillary gas chromatography and mass spectrometry. Molecular distributions of normal saturated fatty acids (C_8-C_<32>) were characterized by an even carbon number predominance with two maxima at C_<16> and C_<24> or C_<22>, suggesting that they are transported long range through the atmosphere over Greenland from both marine and continental biological sources. Unsaturated fatty acids (C_<14>-C_<22>) were abundantly detected in the ice samples with oleic acid (C_<18 : 1>) being predominant. This is in contrast to the remote marine aerosols in which unsaturated fatty acids are depleted due to photochemical oxidation, suggesting that the fatty acids settled down in the Greenland ice sheet without serious photochemical degradation during atmospheric transport. Concentrations of the fatty acids (C_<12>-C_<32>) in the ice core fluctuated in the range of 3.9-104μg/kg-ice with higher values at around 1800,1900-1950,and 1980 AD. Relative abundances of the higher molecular weight fatty acids (C_<20>-C_<32>) were higher (10-30% of total fatty acids) in 1700-1850 AD, and lower (5-8%) in 1920-1950 AD. These results suggest that atmospheric transport of continentally derived materials over Greenland was relatively enhanced in 1700-1850 AD, whereas the transport of marine derived organic matter was significantly intensified in 1920-1950 AD. |
format |
Report |
author |
カワムラ キミタカ スズキ イクコ フジイ ヨシユキ ワタナベ オキツグ Kimitaka KAWAMURA Ikuko SUZUKI Yoshiyuki FUJII Okitsugu WATANABE |
spellingShingle |
カワムラ キミタカ スズキ イクコ フジイ ヨシユキ ワタナベ オキツグ Kimitaka KAWAMURA Ikuko SUZUKI Yoshiyuki FUJII Okitsugu WATANABE HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
author_facet |
カワムラ キミタカ スズキ イクコ フジイ ヨシユキ ワタナベ オキツグ Kimitaka KAWAMURA Ikuko SUZUKI Yoshiyuki FUJII Okitsugu WATANABE |
author_sort |
カワムラ キミタカ |
title |
HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
title_short |
HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
title_full |
HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
title_fullStr |
HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
title_full_unstemmed |
HISTORICAL RECORDS OF FATTY ACIDS IN AN ICE CORE FROM SITE-J, GREENLAND |
title_sort |
historical records of fatty acids in an ice core from site-j, greenland |
publisher |
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University |
publishDate |
1995 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3874 http://id.nii.ac.jp/1291/00003874/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3874&item_no=1&attribute_id=18&file_no=1 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet Polar meteorology and glaciology Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology |
genre_facet |
Greenland ice core Ice Sheet 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=3874 http://id.nii.ac.jp/1291/00003874/ AA10756213 Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology, 9, 1-11(1995-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3874&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766014728502509568 |