Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay
The last deglaciation is the most recent relatively well-documented period of pronounced and fast climate warming, and, as such, it holds important information for our understanding of the climate system. Notably, while research into terrestrial organic carbon reservoirs has been instrumental in exp...
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ftdoajarticles:oai:doaj.org/article:bcd5ac496d0e4dc7a84f63b1e6019fa6 2024-02-11T10:07:51+01:00 Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay E. Queiroz Alves W. Wong J. Hefter H. Grotheer T. Tesi T. Gentz K. Zonneveld G. Mollenhauer 2024-01-01T00:00:00Z https://doi.org/10.5194/cp-20-121-2024 https://doaj.org/article/bcd5ac496d0e4dc7a84f63b1e6019fa6 EN eng Copernicus Publications https://cp.copernicus.org/articles/20/121/2024/cp-20-121-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-121-2024 1814-9324 1814-9332 https://doaj.org/article/bcd5ac496d0e4dc7a84f63b1e6019fa6 Climate of the Past, Vol 20, Pp 121-136 (2024) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2024 ftdoajarticles https://doi.org/10.5194/cp-20-121-2024 2024-01-21T01:41:10Z The last deglaciation is the most recent relatively well-documented period of pronounced and fast climate warming, and, as such, it holds important information for our understanding of the climate system. Notably, while research into terrestrial organic carbon reservoirs has been instrumental in exploring the possible sources of atmospheric carbon dioxide during periods of rapid change, the underlying mechanisms are not fully understood. Here we investigate the mobilization of organic matter to the Bay of Biscay, located in the north-eastern Atlantic Ocean off the coasts of France and Spain. Specifically, we focus on the area that was the mouth of the Channel River during the last deglaciation, where an enhanced terrigenous input has been reported for the last glacial–interglacial transition. We conducted a comprehensive suite of biomarker analyses (e.g. n -alkanes, hopanes and n -alkanoic acids) and isotopic investigations (radiocarbon dating and δ 13 C measurements) on a high-resolution sedimentary archive. The present study provides the first direct evidence for the fluvial supply of immature and ancient terrestrial organic matter to the core location. Moreover, our results reveal the possibility of permafrost carbon export to the ocean, driven by processes such as deglacial warming and glacial erosion. These findings are consistent with observations from other regions characterized by present or past permafrost conditions on land, which have shown that permafrost thaw and glacial erosion can lead to carbon remobilization, potentially influencing atmospheric carbon dioxide levels. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Climate of the Past 20 1 121 136 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 E. Queiroz Alves W. Wong J. Hefter H. Grotheer T. Tesi T. Gentz K. Zonneveld G. Mollenhauer Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The last deglaciation is the most recent relatively well-documented period of pronounced and fast climate warming, and, as such, it holds important information for our understanding of the climate system. Notably, while research into terrestrial organic carbon reservoirs has been instrumental in exploring the possible sources of atmospheric carbon dioxide during periods of rapid change, the underlying mechanisms are not fully understood. Here we investigate the mobilization of organic matter to the Bay of Biscay, located in the north-eastern Atlantic Ocean off the coasts of France and Spain. Specifically, we focus on the area that was the mouth of the Channel River during the last deglaciation, where an enhanced terrigenous input has been reported for the last glacial–interglacial transition. We conducted a comprehensive suite of biomarker analyses (e.g. n -alkanes, hopanes and n -alkanoic acids) and isotopic investigations (radiocarbon dating and δ 13 C measurements) on a high-resolution sedimentary archive. The present study provides the first direct evidence for the fluvial supply of immature and ancient terrestrial organic matter to the core location. Moreover, our results reveal the possibility of permafrost carbon export to the ocean, driven by processes such as deglacial warming and glacial erosion. These findings are consistent with observations from other regions characterized by present or past permafrost conditions on land, which have shown that permafrost thaw and glacial erosion can lead to carbon remobilization, potentially influencing atmospheric carbon dioxide levels. |
format |
Article in Journal/Newspaper |
author |
E. Queiroz Alves W. Wong J. Hefter H. Grotheer T. Tesi T. Gentz K. Zonneveld G. Mollenhauer |
author_facet |
E. Queiroz Alves W. Wong J. Hefter H. Grotheer T. Tesi T. Gentz K. Zonneveld G. Mollenhauer |
author_sort |
E. Queiroz Alves |
title |
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
title_short |
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
title_full |
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
title_fullStr |
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
title_full_unstemmed |
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay |
title_sort |
deglacial export of pre-aged terrigenous carbon to the bay of biscay |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/cp-20-121-2024 https://doaj.org/article/bcd5ac496d0e4dc7a84f63b1e6019fa6 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Climate of the Past, Vol 20, Pp 121-136 (2024) |
op_relation |
https://cp.copernicus.org/articles/20/121/2024/cp-20-121-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-121-2024 1814-9324 1814-9332 https://doaj.org/article/bcd5ac496d0e4dc7a84f63b1e6019fa6 |
op_doi |
https://doi.org/10.5194/cp-20-121-2024 |
container_title |
Climate of the Past |
container_volume |
20 |
container_issue |
1 |
container_start_page |
121 |
op_container_end_page |
136 |
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1790606666772774912 |