Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry
Quantifying changes in seawater carbonate chemistry is crucial to deciphering of patterns and drivers of the oceanic carbon cycle and climate change. Here, we present a new deep-water carbonate ion saturation state (A[CO2- 3 ]) record for the Pliocene western tropical Pacific, reconstructed from the...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://ir.qdio.ac.cn/handle/337002/180295 http://ir.qdio.ac.cn/handle/337002/180296 https://doi.org/10.1016/j.epsl.2022.117868 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/180296 2023-05-15T13:50:10+02:00 Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nurnberg, Dirk Shi, Jiangnan 2022-12-01 http://ir.qdio.ac.cn/handle/337002/180295 http://ir.qdio.ac.cn/handle/337002/180296 https://doi.org/10.1016/j.epsl.2022.117868 英语 eng ELSEVIER EARTH AND PLANETARY SCIENCE LETTERS http://ir.qdio.ac.cn/handle/337002/180295 http://ir.qdio.ac.cn/handle/337002/180296 doi:10.1016/j.epsl.2022.117868 shell weight A[CO2-3 ] Panamanian Gateway glaciation atmosphericpCO2 Site U1490 Geochemistry & Geophysics 期刊论文 2022 ftchinacasciocas https://doi.org/10.1016/j.epsl.2022.117868 2023-01-16T16:14:20Z Quantifying changes in seawater carbonate chemistry is crucial to deciphering of patterns and drivers of the oceanic carbon cycle and climate change. Here, we present a new deep-water carbonate ion saturation state (A[CO2- 3 ]) record for the Pliocene western tropical Pacific, reconstructed from the size -normalized weight of the planktonic foraminifer Trilobatus sacculifer of IODP Site U1490. A steep decline in deep-water A[CO2- 3 ] occurred at similar to 4.6 Ma synchronous to the enhanced production of North Atlantic Deep Water (NADW) related to the closure of the Panamanian Gateway. Subsequently, at the onset of the Northern Hemisphere glaciation at similar to 2.7 Ma the weakening of NADW formation resulted in a deep -water A[CO2- 3 ] peak. The changes in NADW production rate likely controlled a seesaw-like fluctuation in deep-water A[CO2- 3 ] between the Pacific and Atlantic oceans. During the late Pliocene (similar to 3.8-2.8 Ma), Antarctic ice-sheet/sea-ice expansions sequestered CO2 in the deep Pacific through ventilation of the deep watermass, leading to a long-term decrease in deep Pacific A[CO2-3]. We infer that fluctuating NADW production rates at similar to 4.6 Ma and similar to 2.7 Ma influenced inter-basinal fractionation of deep-ocean carbon between the Atlantic and Pacific, and that deep Pacific carbon storage linked to expansions of Antarctic ice sheet/sea ice contributed to the lowering of atmospheric pCO2 and global cooling during the late Pliocene.(c) 2022 Elsevier B.V. All rights reserved. Report Antarc* Antarctic Ice Sheet NADW North Atlantic Deep Water North Atlantic Sea ice Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Antarctic Pacific Earth and Planetary Science Letters 599 117868 |
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Open Polar |
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Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
shell weight A[CO2-3 ] Panamanian Gateway glaciation atmosphericpCO2 Site U1490 Geochemistry & Geophysics |
spellingShingle |
shell weight A[CO2-3 ] Panamanian Gateway glaciation atmosphericpCO2 Site U1490 Geochemistry & Geophysics Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nurnberg, Dirk Shi, Jiangnan Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
topic_facet |
shell weight A[CO2-3 ] Panamanian Gateway glaciation atmosphericpCO2 Site U1490 Geochemistry & Geophysics |
description |
Quantifying changes in seawater carbonate chemistry is crucial to deciphering of patterns and drivers of the oceanic carbon cycle and climate change. Here, we present a new deep-water carbonate ion saturation state (A[CO2- 3 ]) record for the Pliocene western tropical Pacific, reconstructed from the size -normalized weight of the planktonic foraminifer Trilobatus sacculifer of IODP Site U1490. A steep decline in deep-water A[CO2- 3 ] occurred at similar to 4.6 Ma synchronous to the enhanced production of North Atlantic Deep Water (NADW) related to the closure of the Panamanian Gateway. Subsequently, at the onset of the Northern Hemisphere glaciation at similar to 2.7 Ma the weakening of NADW formation resulted in a deep -water A[CO2- 3 ] peak. The changes in NADW production rate likely controlled a seesaw-like fluctuation in deep-water A[CO2- 3 ] between the Pacific and Atlantic oceans. During the late Pliocene (similar to 3.8-2.8 Ma), Antarctic ice-sheet/sea-ice expansions sequestered CO2 in the deep Pacific through ventilation of the deep watermass, leading to a long-term decrease in deep Pacific A[CO2-3]. We infer that fluctuating NADW production rates at similar to 4.6 Ma and similar to 2.7 Ma influenced inter-basinal fractionation of deep-ocean carbon between the Atlantic and Pacific, and that deep Pacific carbon storage linked to expansions of Antarctic ice sheet/sea ice contributed to the lowering of atmospheric pCO2 and global cooling during the late Pliocene.(c) 2022 Elsevier B.V. All rights reserved. |
format |
Report |
author |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nurnberg, Dirk Shi, Jiangnan |
author_facet |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nurnberg, Dirk Shi, Jiangnan |
author_sort |
Qin, Bingbin |
title |
Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
title_short |
Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
title_full |
Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
title_fullStr |
Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
title_full_unstemmed |
Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
title_sort |
influences of atlantic ocean thermohaline circulation and antarctic ice-sheet expansion on pliocene deep pacific carbonate chemistry |
publisher |
ELSEVIER |
publishDate |
2022 |
url |
http://ir.qdio.ac.cn/handle/337002/180295 http://ir.qdio.ac.cn/handle/337002/180296 https://doi.org/10.1016/j.epsl.2022.117868 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Ice Sheet NADW North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic Ice Sheet NADW North Atlantic Deep Water North Atlantic Sea ice |
op_relation |
EARTH AND PLANETARY SCIENCE LETTERS http://ir.qdio.ac.cn/handle/337002/180295 http://ir.qdio.ac.cn/handle/337002/180296 doi:10.1016/j.epsl.2022.117868 |
op_doi |
https://doi.org/10.1016/j.epsl.2022.117868 |
container_title |
Earth and Planetary Science Letters |
container_volume |
599 |
container_start_page |
117868 |
_version_ |
1766253143063003136 |