Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM
© The Author(s), 2020. 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., & Wu, L. Assessing the potential capability of reconstructing glacial At...
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Online Access: | https://hdl.handle.net/1912/25881 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/25881 2023-05-15T17:13:55+02:00 Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Wu, Lixin 2020-05-06 https://hdl.handle.net/1912/25881 unknown Elsevier https://doi.org/10.1016/j.epsl.2020.116294 Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., & Wu, L. (2020). Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, 116294. https://hdl.handle.net/1912/25881 doi:10.1016/j.epsl.2020.116294 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., & Wu, L. (2020). Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, 116294. doi:10.1016/j.epsl.2020.116294 Last Glacial Maximum AMOC Water mass Multi-proxy Article 2020 ftwhoas https://doi.org/10.1016/j.epsl.2020.116294 2022-10-29T22:57:20Z © The Author(s), 2020. 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., & Wu, L. Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, (2020): 11629, doi:10.1016/j.epsl.2020.116294. Reconstructing the Atlantic Meridional Overturning Circulation (AMOC) during the Last Glacial Maximum (LGM) is essential for understanding glacial-interglacial climate change and the carbon cycle. However, despite many previous studies, uncertainties remain regarding the glacial water mass distributions in the Atlantic and the AMOC intensity. Here we use an isotope enabled ocean model with multiple geotracers (δ 13 C,E Νd,231 Pa/ 230Th,δ 18 Ο and Δ 14 C) and idealized water tracers to study the potential constraints on LGM ocean circulation from multiple proxies. Our model suggests that the glacial Atlantic water mass distribution can be accurately constrained by the air-sea gas exchange signature of water masses (δ13 C AS), but E Nd might overestimate the North Atlantic Deep Water (NADW) percentage in the deep Atlantic probably because of the boundary source of Nd. A sensitivity experiment with an AMOC of similar geometry but much weaker strength suggests that the correct AMOC geometry is more important than the AMOC strength for simulating the observed glacial δ13 C AS and E Nd and distributions. The kinematic tracer 231Pa/230Th is sensitive to AMOC intensity, but the interpretation might be complicated by the AMOC geometry and AABW transport changes during the LGM. δ 18 Ο in the benthic foraminifera (δ 18 Οc) from the Florida Straits provides a consistent measure of the upper ocean boundary current in the model, which potentially provides an unambiguous method to reconstruct glacial AMOC intensity. Finally, we propose that the moderate difference between AMOC ... 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 541 116294 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Last Glacial Maximum AMOC Water mass Multi-proxy |
spellingShingle |
Last Glacial Maximum AMOC Water mass Multi-proxy Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Wu, Lixin Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
topic_facet |
Last Glacial Maximum AMOC Water mass Multi-proxy |
description |
© The Author(s), 2020. 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., & Wu, L. Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, (2020): 11629, doi:10.1016/j.epsl.2020.116294. Reconstructing the Atlantic Meridional Overturning Circulation (AMOC) during the Last Glacial Maximum (LGM) is essential for understanding glacial-interglacial climate change and the carbon cycle. However, despite many previous studies, uncertainties remain regarding the glacial water mass distributions in the Atlantic and the AMOC intensity. Here we use an isotope enabled ocean model with multiple geotracers (δ 13 C,E Νd,231 Pa/ 230Th,δ 18 Ο and Δ 14 C) and idealized water tracers to study the potential constraints on LGM ocean circulation from multiple proxies. Our model suggests that the glacial Atlantic water mass distribution can be accurately constrained by the air-sea gas exchange signature of water masses (δ13 C AS), but E Nd might overestimate the North Atlantic Deep Water (NADW) percentage in the deep Atlantic probably because of the boundary source of Nd. A sensitivity experiment with an AMOC of similar geometry but much weaker strength suggests that the correct AMOC geometry is more important than the AMOC strength for simulating the observed glacial δ13 C AS and E Nd and distributions. The kinematic tracer 231Pa/230Th is sensitive to AMOC intensity, but the interpretation might be complicated by the AMOC geometry and AABW transport changes during the LGM. δ 18 Ο in the benthic foraminifera (δ 18 Οc) from the Florida Straits provides a consistent measure of the upper ocean boundary current in the model, which potentially provides an unambiguous method to reconstruct glacial AMOC intensity. Finally, we propose that the moderate difference between AMOC ... |
format |
Article in Journal/Newspaper |
author |
Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Wu, Lixin |
author_facet |
Gu, Sifan Liu, Zhengyu Oppo, Delia W. Lynch-Stieglitz, Jean Jahn, Alexandra Zhang, Jiaxu Wu, Lixin |
author_sort |
Gu, Sifan |
title |
Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
title_short |
Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
title_full |
Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
title_fullStr |
Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
title_full_unstemmed |
Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM |
title_sort |
assessing the potential capability of reconstructing glacial atlantic water masses and amoc using multiple proxies in cesm |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/1912/25881 |
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., & Wu, L. (2020). Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, 116294. doi:10.1016/j.epsl.2020.116294 |
op_relation |
https://doi.org/10.1016/j.epsl.2020.116294 Gu, S., Liu, Z., Oppo, D. W., Lynch-Stieglitz, J., Jahn, A., Zhang, J., & Wu, L. (2020). Assessing the potential capability of reconstructing glacial Atlantic water masses and AMOC using multiple proxies in CESM. Earth and Planetary Science Letters, 541, 116294. https://hdl.handle.net/1912/25881 doi:10.1016/j.epsl.2020.116294 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.epsl.2020.116294 |
container_title |
Earth and Planetary Science Letters |
container_volume |
541 |
container_start_page |
116294 |
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1766071124241678336 |