Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry
Highlights • High-resolution deep-water record for Pliocene western tropical Pacific. • Changes in NADW production at ∼4.6 Ma and ∼2.7 Ma influenced Pacific • These changes controlled a seesaw fluctuation between deep Pacific and Atlantic oceans. • Antarctic ice-sheet/sea-ice expansions influenced d...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2022
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/57182/ https://oceanrep.geomar.de/id/eprint/57182/1/Qin%20et%20al.,%202022.pdf https://doi.org/10.1016/j.epsl.2022.117868 |
id |
ftoceanrep:oai:oceanrep.geomar.de:57182 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:57182 2024-02-11T09:58:22+01:00 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 Nürnberg, Dirk Shi, Jiangnan 2022-12 text https://oceanrep.geomar.de/id/eprint/57182/ https://oceanrep.geomar.de/id/eprint/57182/1/Qin%20et%20al.,%202022.pdf https://doi.org/10.1016/j.epsl.2022.117868 en eng Elsevier https://oceanrep.geomar.de/id/eprint/57182/1/Qin%20et%20al.,%202022.pdf Qin, B., Li, T., Xiong, Z., Algeo, T. J., Jia, Q., Nürnberg, D. and Shi, J. (2022) Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry. Earth and Planetary Science Letters, 599 . Art.Nr. 117868. DOI 10.1016/j.epsl.2022.117868 <https://doi.org/10.1016/j.epsl.2022.117868>. doi:10.1016/j.epsl.2022.117868 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1016/j.epsl.2022.117868 2024-01-15T00:26:12Z Highlights • High-resolution deep-water record for Pliocene western tropical Pacific. • Changes in NADW production at ∼4.6 Ma and ∼2.7 Ma influenced Pacific • These changes controlled a seesaw fluctuation between deep Pacific and Atlantic oceans. • Antarctic ice-sheet/sea-ice expansions influenced deep Pacific • These ice-mass changes resulted in long-term decline during late Pliocene. Abstract 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 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 occurred at ∼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 ∼2.7 Ma the weakening of NADW formation resulted in a deep-water peak. The changes in NADW production rate likely controlled a seesaw-like fluctuation in deep-water between the Pacific and Atlantic oceans. During the late Pliocene (∼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 . We infer that fluctuating NADW production rates at ∼4.6 Ma and ∼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. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet NADW North Atlantic Deep Water North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Pacific Earth and Planetary Science Letters 599 117868 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights • High-resolution deep-water record for Pliocene western tropical Pacific. • Changes in NADW production at ∼4.6 Ma and ∼2.7 Ma influenced Pacific • These changes controlled a seesaw fluctuation between deep Pacific and Atlantic oceans. • Antarctic ice-sheet/sea-ice expansions influenced deep Pacific • These ice-mass changes resulted in long-term decline during late Pliocene. Abstract 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 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 occurred at ∼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 ∼2.7 Ma the weakening of NADW formation resulted in a deep-water peak. The changes in NADW production rate likely controlled a seesaw-like fluctuation in deep-water between the Pacific and Atlantic oceans. During the late Pliocene (∼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 . We infer that fluctuating NADW production rates at ∼4.6 Ma and ∼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. |
format |
Article in Journal/Newspaper |
author |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nürnberg, Dirk Shi, Jiangnan |
spellingShingle |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nürnberg, Dirk Shi, Jiangnan Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry |
author_facet |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Jia, Qi Nürnberg, 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 |
https://oceanrep.geomar.de/id/eprint/57182/ https://oceanrep.geomar.de/id/eprint/57182/1/Qin%20et%20al.,%202022.pdf 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 |
https://oceanrep.geomar.de/id/eprint/57182/1/Qin%20et%20al.,%202022.pdf Qin, B., Li, T., Xiong, Z., Algeo, T. J., Jia, Q., Nürnberg, D. and Shi, J. (2022) Influences of Atlantic Ocean thermohaline circulation and Antarctic ice-sheet expansion on Pliocene deep Pacific carbonate chemistry. Earth and Planetary Science Letters, 599 . Art.Nr. 117868. DOI 10.1016/j.epsl.2022.117868 <https://doi.org/10.1016/j.epsl.2022.117868>. doi:10.1016/j.epsl.2022.117868 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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_ |
1790593997480132608 |