A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3
Arctic paleoenvironmental archives serve as sensitive recorders of past climate change. Lake El'gygytgyn (Far East Russian Arctic) is a high-latitude crater impact lake that contains a continuous sediment record influenced by neither glaciation nor glacial erosion since the time of impact 3.58...
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Language: | English |
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Copernicus Publications
2013
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Online Access: | https://doi.org/10.5194/cp-9-243-2013 https://doaj.org/article/34bd14da89844433a3199773d40be89e |
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ftdoajarticles:oai:doaj.org/article:34bd14da89844433a3199773d40be89e 2023-05-15T14:58:11+02:00 A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 A. R. Holland S. T. Petsch I. S. Castañeda K. M. Wilkie S. J. Burns J. Brigham-Grette 2013-01-01T00:00:00Z https://doi.org/10.5194/cp-9-243-2013 https://doaj.org/article/34bd14da89844433a3199773d40be89e EN eng Copernicus Publications http://www.clim-past.net/9/243/2013/cp-9-243-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-243-2013 1814-9324 1814-9332 https://doaj.org/article/34bd14da89844433a3199773d40be89e Climate of the Past, Vol 9, Iss 1, Pp 243-260 (2013) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2013 ftdoajarticles https://doi.org/10.5194/cp-9-243-2013 2022-12-31T13:23:18Z Arctic paleoenvironmental archives serve as sensitive recorders of past climate change. Lake El'gygytgyn (Far East Russian Arctic) is a high-latitude crater impact lake that contains a continuous sediment record influenced by neither glaciation nor glacial erosion since the time of impact 3.58 Ma ago. Prior research on sediments collected from Lake El'gygytgyn suggest times of permanent ice cover and anoxia corresponding to global glacial intervals, during which the sediments are laminated and are characterized by the co-occurrence of high total organic carbon, microscopic magnetite grains that show etching and dissolution, and negative excursions in bulk sediment organic matter carbon isotope (δ 13 C) values. Here we investigate the abundance and carbon isotopic composition of lipid biomarkers recovered from Lake El'gygytgyn sediments spanning marine isotope stages 1–3 to identify key sources of organic matter (OM) to lake sediments, to establish which OM sources drive the negative δ 13 C excursion exhibited by bulk sediment OM, and to explore if there are molecular and isotopic signatures of anoxia in the lake during glaciation. We find that during marine isotope stages 1–3, direct evidence for water column anoxia is lacking. A ~4‰ negative excursion in bulk sediment δ 13 C values during the Local Last Glacial Maximum (LLGM) is accompanied by more protracted, higher magnitude negative excursions in n -alkanoic acid and n -alkanol δ 13 C values that begin 20 kyr in advance of the LLGM. In contrast, n -alkanes and the C 30 n -alkanoic acid do not exhibit a negative δ 13 C excursion at this time. Our results indicate that the C 24 , C 26 and C 28 n -alkanoic acids do not derive entirely from terrestrial OM sources, while the C 30 n -alkanoic acid at Lake El'gygytgyn is a robust indicator of terrestrial OM contributions. Overall, our results strongly support the presence of a nutrient-poor water column, which is mostly isolated from atmospheric carbon dioxide during glaciation at Lake El'gygytgyn. Article in Journal/Newspaper Arctic Climate change Directory of Open Access Journals: DOAJ Articles Arctic Impact Lake ENVELOPE(-117.075,-117.075,67.583,67.583) Climate of the Past 9 1 243 260 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 A. R. Holland S. T. Petsch I. S. Castañeda K. M. Wilkie S. J. Burns J. Brigham-Grette A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Arctic paleoenvironmental archives serve as sensitive recorders of past climate change. Lake El'gygytgyn (Far East Russian Arctic) is a high-latitude crater impact lake that contains a continuous sediment record influenced by neither glaciation nor glacial erosion since the time of impact 3.58 Ma ago. Prior research on sediments collected from Lake El'gygytgyn suggest times of permanent ice cover and anoxia corresponding to global glacial intervals, during which the sediments are laminated and are characterized by the co-occurrence of high total organic carbon, microscopic magnetite grains that show etching and dissolution, and negative excursions in bulk sediment organic matter carbon isotope (δ 13 C) values. Here we investigate the abundance and carbon isotopic composition of lipid biomarkers recovered from Lake El'gygytgyn sediments spanning marine isotope stages 1–3 to identify key sources of organic matter (OM) to lake sediments, to establish which OM sources drive the negative δ 13 C excursion exhibited by bulk sediment OM, and to explore if there are molecular and isotopic signatures of anoxia in the lake during glaciation. We find that during marine isotope stages 1–3, direct evidence for water column anoxia is lacking. A ~4‰ negative excursion in bulk sediment δ 13 C values during the Local Last Glacial Maximum (LLGM) is accompanied by more protracted, higher magnitude negative excursions in n -alkanoic acid and n -alkanol δ 13 C values that begin 20 kyr in advance of the LLGM. In contrast, n -alkanes and the C 30 n -alkanoic acid do not exhibit a negative δ 13 C excursion at this time. Our results indicate that the C 24 , C 26 and C 28 n -alkanoic acids do not derive entirely from terrestrial OM sources, while the C 30 n -alkanoic acid at Lake El'gygytgyn is a robust indicator of terrestrial OM contributions. Overall, our results strongly support the presence of a nutrient-poor water column, which is mostly isolated from atmospheric carbon dioxide during glaciation at Lake El'gygytgyn. |
format |
Article in Journal/Newspaper |
author |
A. R. Holland S. T. Petsch I. S. Castañeda K. M. Wilkie S. J. Burns J. Brigham-Grette |
author_facet |
A. R. Holland S. T. Petsch I. S. Castañeda K. M. Wilkie S. J. Burns J. Brigham-Grette |
author_sort |
A. R. Holland |
title |
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
title_short |
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
title_full |
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
title_fullStr |
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
title_full_unstemmed |
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
title_sort |
biomarker record of lake el'gygytgyn, far east russian arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3 |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-243-2013 https://doaj.org/article/34bd14da89844433a3199773d40be89e |
long_lat |
ENVELOPE(-117.075,-117.075,67.583,67.583) |
geographic |
Arctic Impact Lake |
geographic_facet |
Arctic Impact Lake |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Climate of the Past, Vol 9, Iss 1, Pp 243-260 (2013) |
op_relation |
http://www.clim-past.net/9/243/2013/cp-9-243-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-243-2013 1814-9324 1814-9332 https://doaj.org/article/34bd14da89844433a3199773d40be89e |
op_doi |
https://doi.org/10.5194/cp-9-243-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
1 |
container_start_page |
243 |
op_container_end_page |
260 |
_version_ |
1766330274760622080 |