Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere
An ice core drilled at Aurora Peak in southeast Alaska was analyzed for homologous series of straight chain fatty acids (C-12:0-C-30:0) including unsaturated fatty acid (oleic acid) using gas chromatography (GC/FID) and GC/mass spectrometry (GC/MS). Molecular distributions of fatty acids are charact...
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Online Access: | http://hdl.handle.net/2115/57981 https://doi.org/10.1016/j.atmosenv.2014.11.007 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/57981 2023-05-15T15:14:47+02:00 Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere Pokhrel, Ambarish Kawamura, Kimitaka Seki, Osamu Matoba, Sumito Shiraiwa, Takayuki http://hdl.handle.net/2115/57981 https://doi.org/10.1016/j.atmosenv.2014.11.007 eng eng Elsevier http://hdl.handle.net/2115/57981 Atmospheric environment, 100: 202-209 http://dx.doi.org/10.1016/j.atmosenv.2014.11.007 Fatty acids Alaskan ice core Marine-derived organic matter Atmospheric circulation Atmospheric transport Climate change 519 article (author version) fthokunivhus https://doi.org/10.1016/j.atmosenv.2014.11.007 2022-11-18T01:03:21Z An ice core drilled at Aurora Peak in southeast Alaska was analyzed for homologous series of straight chain fatty acids (C-12:0-C-30:0) including unsaturated fatty acid (oleic acid) using gas chromatography (GC/FID) and GC/mass spectrometry (GC/MS). Molecular distributions of fatty acids are characterized by even carbon number predominance with a peak at palmitic acid (C-16:0, av. 20.3 +/- SD. 29.8 ng/g-ice) followed by oleic acid (C-18:1, 19.6 +/- 38.6 ng/g-ice) and myristic acid (C-14:0, 15.3 +/- 21.9 ng/g-ice). The historical trends of short-chain fatty acids, together with correlation analysis with inorganic ions and organic tracers suggest that short-chain fatty acids (except for C-12:0 and C-15:0) were mainly derived from sea surface micro layers through bubble bursting mechanism and transported over the glacier through the atmosphere. This atmospheric transport process is suggested to be linked with Kamchatka ice core SD record from Northeast Asia and Greenland Temperature Anomaly (GTA). In contrast, long-chain fatty acids (C-20.0-C-30:0) are originated from terrestrial higher plants, soil organic matter and dusts, which are also linked with GTA. Hence, this study suggests that Alaskan fatty acids are strongly influenced by Pacific Decadal Oscillation/North Pacific Gyre Oscillation and/or extra tropical North Pacific surface climate and Arctic oscillation. We also found that decadal scale variability of C-18:1/C-18:0 ratios in the Aurora Peak ice core correlate with the Kamchatka ice core SD, which reflects climate oscillations in the North Pacific. This study suggests that photochemical aging of organic aerosols could be controlled by climate periodicity. (C) 2014 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Arctic Climate change glacier glacier Greenland ice core Kamchatka Alaska Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Aurora Peak ENVELOPE(144.200,144.200,-67.383,-67.383) Fid ENVELOPE(-65.939,-65.939,-68.664,-68.664) Greenland Pacific Atmospheric Environment 100 202 209 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Fatty acids Alaskan ice core Marine-derived organic matter Atmospheric circulation Atmospheric transport Climate change 519 |
spellingShingle |
Fatty acids Alaskan ice core Marine-derived organic matter Atmospheric circulation Atmospheric transport Climate change 519 Pokhrel, Ambarish Kawamura, Kimitaka Seki, Osamu Matoba, Sumito Shiraiwa, Takayuki Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
topic_facet |
Fatty acids Alaskan ice core Marine-derived organic matter Atmospheric circulation Atmospheric transport Climate change 519 |
description |
An ice core drilled at Aurora Peak in southeast Alaska was analyzed for homologous series of straight chain fatty acids (C-12:0-C-30:0) including unsaturated fatty acid (oleic acid) using gas chromatography (GC/FID) and GC/mass spectrometry (GC/MS). Molecular distributions of fatty acids are characterized by even carbon number predominance with a peak at palmitic acid (C-16:0, av. 20.3 +/- SD. 29.8 ng/g-ice) followed by oleic acid (C-18:1, 19.6 +/- 38.6 ng/g-ice) and myristic acid (C-14:0, 15.3 +/- 21.9 ng/g-ice). The historical trends of short-chain fatty acids, together with correlation analysis with inorganic ions and organic tracers suggest that short-chain fatty acids (except for C-12:0 and C-15:0) were mainly derived from sea surface micro layers through bubble bursting mechanism and transported over the glacier through the atmosphere. This atmospheric transport process is suggested to be linked with Kamchatka ice core SD record from Northeast Asia and Greenland Temperature Anomaly (GTA). In contrast, long-chain fatty acids (C-20.0-C-30:0) are originated from terrestrial higher plants, soil organic matter and dusts, which are also linked with GTA. Hence, this study suggests that Alaskan fatty acids are strongly influenced by Pacific Decadal Oscillation/North Pacific Gyre Oscillation and/or extra tropical North Pacific surface climate and Arctic oscillation. We also found that decadal scale variability of C-18:1/C-18:0 ratios in the Aurora Peak ice core correlate with the Kamchatka ice core SD, which reflects climate oscillations in the North Pacific. This study suggests that photochemical aging of organic aerosols could be controlled by climate periodicity. (C) 2014 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Pokhrel, Ambarish Kawamura, Kimitaka Seki, Osamu Matoba, Sumito Shiraiwa, Takayuki |
author_facet |
Pokhrel, Ambarish Kawamura, Kimitaka Seki, Osamu Matoba, Sumito Shiraiwa, Takayuki |
author_sort |
Pokhrel, Ambarish |
title |
Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
title_short |
Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
title_full |
Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
title_fullStr |
Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
title_full_unstemmed |
Ice core profiles of saturated fatty acids (C-12:0-C-30:0) and oleic acid (C-18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere |
title_sort |
ice core profiles of saturated fatty acids (c-12:0-c-30:0) and oleic acid (c-18:1) from southern alaska since 1734 ad: a link to climate change in the northern hemisphere |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/57981 https://doi.org/10.1016/j.atmosenv.2014.11.007 |
long_lat |
ENVELOPE(144.200,144.200,-67.383,-67.383) ENVELOPE(-65.939,-65.939,-68.664,-68.664) |
geographic |
Arctic Aurora Peak Fid Greenland Pacific |
geographic_facet |
Arctic Aurora Peak Fid Greenland Pacific |
genre |
Arctic Climate change glacier glacier Greenland ice core Kamchatka Alaska |
genre_facet |
Arctic Climate change glacier glacier Greenland ice core Kamchatka Alaska |
op_relation |
http://hdl.handle.net/2115/57981 Atmospheric environment, 100: 202-209 http://dx.doi.org/10.1016/j.atmosenv.2014.11.007 |
op_doi |
https://doi.org/10.1016/j.atmosenv.2014.11.007 |
container_title |
Atmospheric Environment |
container_volume |
100 |
container_start_page |
202 |
op_container_end_page |
209 |
_version_ |
1766345201127784448 |