Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence
We present new size-normalized weight (SNW)-[CO32-] core-top calibrations for three planktonic foraminiferal species and assess their reliability as a paleo-alkalinity proxy. SNWs of Globigerina sacculifer and Neogloboquadrina dutertrei can be used to reconstruct past deep Pacific [CO32-], whereas S...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/136864 2023-05-15T18:01:01+02:00 Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Chang, Fengming 2017-04-01 http://ir.qdio.ac.cn/handle/337002/136864 https://doi.org/10.1002/2016PA003039 英语 eng PALEOCEANOGRAPHY Qin, Bingbin,Li, Tiegang,Xiong, Zhifang,et al. Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence[J]. PALEOCEANOGRAPHY,2017,32(4):351-370. http://ir.qdio.ac.cn/handle/337002/136864 doi:10.1002/2016PA003039 Shell Weight Planktonic Foraminifera Proxy Calibration Carbonate Chemistry Coral Reef Hypothesis Ocean Stratification Article 期刊论文 2017 ftchinacasciocas https://doi.org/10.1002/2016PA003039 2022-06-27T05:38:04Z We present new size-normalized weight (SNW)-[CO32-] core-top calibrations for three planktonic foraminiferal species and assess their reliability as a paleo-alkalinity proxy. SNWs of Globigerina sacculifer and Neogloboquadrina dutertrei can be used to reconstruct past deep Pacific [CO32-], whereas SNWs of Pulleniatina obliquiloculata are controlled by additional environmental factors. Based on this methodological advance, we reconstruct SNW-based deepwater [CO32-] for core WP7 from the western tropical Pacific since 250ka. Secular variation in the SNW proxy documents little change in deep Pacific [CO32-] between the Last Glacial Maximum and the Holocene. Further back in time, deepwater [CO32-] shows long-term increases from marine isotope stage (MIS) 5e to MIS 3 and from early MIS 7 to late MIS 6, consistent with the coral reef hypothesis that the deep Pacific Ocean carbonate system responded to declining shelf carbonate production during these two intervals. During deglaciations, we have evidence of [CO32-] peaks coincident with Terminations 2 and 3, which suggests that a breakdown of oceanic vertical stratification drove a net transfer of CO2 from the ocean to the atmosphere, causing spikes in carbonate preservation (i.e., the deglacial ventilation hypothesis). During MIS 4, a transient decline in SNW-based [CO32-], along with other reported [CO32-] and/or dissolution records, implies that increased deep-ocean carbon storage resulted in a global carbonate dissolution event. These findings provide new insights into the role of the deep Pacific in the global carbon cycle during the late Quaternary. Article in Journal/Newspaper Planktonic foraminifera Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Pacific Paleoceanography 32 4 351 370 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Shell Weight Planktonic Foraminifera Proxy Calibration Carbonate Chemistry Coral Reef Hypothesis Ocean Stratification |
spellingShingle |
Shell Weight Planktonic Foraminifera Proxy Calibration Carbonate Chemistry Coral Reef Hypothesis Ocean Stratification Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Chang, Fengming Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
topic_facet |
Shell Weight Planktonic Foraminifera Proxy Calibration Carbonate Chemistry Coral Reef Hypothesis Ocean Stratification |
description |
We present new size-normalized weight (SNW)-[CO32-] core-top calibrations for three planktonic foraminiferal species and assess their reliability as a paleo-alkalinity proxy. SNWs of Globigerina sacculifer and Neogloboquadrina dutertrei can be used to reconstruct past deep Pacific [CO32-], whereas SNWs of Pulleniatina obliquiloculata are controlled by additional environmental factors. Based on this methodological advance, we reconstruct SNW-based deepwater [CO32-] for core WP7 from the western tropical Pacific since 250ka. Secular variation in the SNW proxy documents little change in deep Pacific [CO32-] between the Last Glacial Maximum and the Holocene. Further back in time, deepwater [CO32-] shows long-term increases from marine isotope stage (MIS) 5e to MIS 3 and from early MIS 7 to late MIS 6, consistent with the coral reef hypothesis that the deep Pacific Ocean carbonate system responded to declining shelf carbonate production during these two intervals. During deglaciations, we have evidence of [CO32-] peaks coincident with Terminations 2 and 3, which suggests that a breakdown of oceanic vertical stratification drove a net transfer of CO2 from the ocean to the atmosphere, causing spikes in carbonate preservation (i.e., the deglacial ventilation hypothesis). During MIS 4, a transient decline in SNW-based [CO32-], along with other reported [CO32-] and/or dissolution records, implies that increased deep-ocean carbon storage resulted in a global carbonate dissolution event. These findings provide new insights into the role of the deep Pacific in the global carbon cycle during the late Quaternary. |
format |
Article in Journal/Newspaper |
author |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Chang, Fengming |
author_facet |
Qin, Bingbin Li, Tiegang Xiong, Zhifang Algeo, Thomas J. Chang, Fengming |
author_sort |
Qin, Bingbin |
title |
Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
title_short |
Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
title_full |
Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
title_fullStr |
Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
title_full_unstemmed |
Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence |
title_sort |
deepwater carbonate ion concentrations in the western tropical pacific since 250ka: evidence for oceanic carbon storage and global climate influence |
publishDate |
2017 |
url |
http://ir.qdio.ac.cn/handle/337002/136864 https://doi.org/10.1002/2016PA003039 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
PALEOCEANOGRAPHY Qin, Bingbin,Li, Tiegang,Xiong, Zhifang,et al. Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence[J]. PALEOCEANOGRAPHY,2017,32(4):351-370. http://ir.qdio.ac.cn/handle/337002/136864 doi:10.1002/2016PA003039 |
op_doi |
https://doi.org/10.1002/2016PA003039 |
container_title |
Paleoceanography |
container_volume |
32 |
container_issue |
4 |
container_start_page |
351 |
op_container_end_page |
370 |
_version_ |
1766170330146013184 |