Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. Remineralization dominating the δ13 C decrease in...
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Online Access: | https://hdl.handle.net/1912/27703 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27703 2023-05-15T17:13:51+02:00 Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Lindsay, Keith Wu, Lixin 2021-07-20 https://hdl.handle.net/1912/27703 unknown Elsevier https://doi.org/10.1016/j.epsl.2021.117106 Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. (2021). Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, 117106. https://hdl.handle.net/1912/27703 doi:10.1016/j.epsl.2021.117106 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. (2021). Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, 117106. doi:10.1016/j.epsl.2021.117106 δ13 C Water mass composition Remineralization End-member HS1 Article 2021 ftwhoas https://doi.org/10.1016/j.epsl.2021.117106 2022-10-29T22:57:24Z © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, (2021): 117106, https://doi.org/10.1016/j.epsl.2021.117106. δ 13 C records from the mid-depth Atlantic show a pronounced decrease during the Heinrich Stadial 1 (HS1), a deglacial episode of dramatically weakened Atlantic Meridional Ocean Circulation (AMOC). Proposed explanations for this mid-depth decrease include a greater fraction of δ 13 C -depleted southern sourced water (SSW), a δ 13 C decrease in the North Atlantic Deep Water (NADW) end-member, and accumulation of the respired organic carbon. However, the relative importance of these proposed mechanisms cannot be quantitatively constrained from current available observations alone. Here we diagnose the individual contributions to the deglacial Atlantic mid-depth δ 13 C change from these mechanisms using a transient simulation with carbon isotopes and idealized tracers. We find that although the fraction of the low- δ 13 C SSW increases in response to a weaker AMOC during HS1, the water mass mixture change only plays a minor role in the mid-depth Atlantic δ 13 C decrease. Instead, increased remineralization due to the AMOC-induced mid-depth ocean ventilation decrease is the dominant cause. In this study, we differentiate between the deep end-members, which are assigned to deep water regions used in previous paleoceanography studies, and the surface end-members, which are from the near-surface water defined from the physical origin of deep water masses. We find that the deep NADW end-member includes additional remineralized material accumulated when sinking from the surface (surface NADW end-member). Therefore, the surface end-members should be used in diagnosing ... Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Lynch ENVELOPE(-57.683,-57.683,-63.783,-63.783) Earth and Planetary Science Letters 571 117106 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
δ13 C Water mass composition Remineralization End-member HS1 |
spellingShingle |
δ13 C Water mass composition Remineralization End-member HS1 Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Lindsay, Keith Wu, Lixin Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
topic_facet |
δ13 C Water mass composition Remineralization End-member HS1 |
description |
© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, (2021): 117106, https://doi.org/10.1016/j.epsl.2021.117106. δ 13 C records from the mid-depth Atlantic show a pronounced decrease during the Heinrich Stadial 1 (HS1), a deglacial episode of dramatically weakened Atlantic Meridional Ocean Circulation (AMOC). Proposed explanations for this mid-depth decrease include a greater fraction of δ 13 C -depleted southern sourced water (SSW), a δ 13 C decrease in the North Atlantic Deep Water (NADW) end-member, and accumulation of the respired organic carbon. However, the relative importance of these proposed mechanisms cannot be quantitatively constrained from current available observations alone. Here we diagnose the individual contributions to the deglacial Atlantic mid-depth δ 13 C change from these mechanisms using a transient simulation with carbon isotopes and idealized tracers. We find that although the fraction of the low- δ 13 C SSW increases in response to a weaker AMOC during HS1, the water mass mixture change only plays a minor role in the mid-depth Atlantic δ 13 C decrease. Instead, increased remineralization due to the AMOC-induced mid-depth ocean ventilation decrease is the dominant cause. In this study, we differentiate between the deep end-members, which are assigned to deep water regions used in previous paleoceanography studies, and the surface end-members, which are from the near-surface water defined from the physical origin of deep water masses. We find that the deep NADW end-member includes additional remineralized material accumulated when sinking from the surface (surface NADW end-member). Therefore, the surface end-members should be used in diagnosing ... |
format |
Article in Journal/Newspaper |
author |
Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Lindsay, Keith Wu, Lixin |
author_facet |
Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Lindsay, Keith Wu, Lixin |
author_sort |
Gu, Sifan |
title |
Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
title_short |
Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
title_full |
Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
title_fullStr |
Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
title_full_unstemmed |
Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation |
title_sort |
remineralization dominating the δ13 c decrease in the mid-depth atlantic during the last deglaciation |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/1912/27703 |
long_lat |
ENVELOPE(-57.683,-57.683,-63.783,-63.783) |
geographic |
Lynch |
geographic_facet |
Lynch |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_source |
Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. (2021). Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, 117106. doi:10.1016/j.epsl.2021.117106 |
op_relation |
https://doi.org/10.1016/j.epsl.2021.117106 Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., Lindsay, K., & Wu, L. (2021). Remineralization dominating the δ13 C decrease in the mid-depth Atlantic during the last deglaciation. Earth and Planetary Science Letters, 571, 117106. https://hdl.handle.net/1912/27703 doi:10.1016/j.epsl.2021.117106 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.epsl.2021.117106 |
container_title |
Earth and Planetary Science Letters |
container_volume |
571 |
container_start_page |
117106 |
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1766071045229379584 |