Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A)
Benthic foraminiferal delta13C suggests that there was a net shift of isotopically light metabolic CO2 from the upper ocean into the deep ocean during the last glacial period. According to the 'CaCO3 compensation' hypothesis, this should have caused a transient drop in deep ocean CO3[2-] t...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.712938 2023-05-15T16:41:25+02:00 Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) Marchitto, Thomas M Lynch-Stieglitz, Jean Hemming, Sidney R LATITUDE: -1.650000 * LONGITUDE: -103.630000 * DATE/TIME START: 1970-04-29T00:00:00 * DATE/TIME END: 1970-04-29T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.010 m * MAXIMUM DEPTH, sediment/rock: 3.990 m 2005-02-18 text/tab-separated-values, 202 data points https://doi.pangaea.de/10.1594/PANGAEA.712938 https://doi.org/10.1594/PANGAEA.712938 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.712938 https://doi.org/10.1594/PANGAEA.712938 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Marchitto, Thomas M; Lynch-Stieglitz, Jean; Hemming, Sidney R (2005): Deep Pacific CaCO3 compensation and glacial-interglacial atmospheric CO2. Earth and Planetary Science Letters, 231(3-4), 317-336, https://doi.org/10.1016/j.epsl.2004.12.024 Cadmium/Calcium ratio DEPTH sediment/rock Manganese/Calcium ratio PC Piston corer RC13 RC13-114 Robert Conrad Zinc/Calcium ratio Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.712938 https://doi.org/10.1016/j.epsl.2004.12.024 2023-01-20T08:47:16Z Benthic foraminiferal delta13C suggests that there was a net shift of isotopically light metabolic CO2 from the upper ocean into the deep ocean during the last glacial period. According to the 'CaCO3 compensation' hypothesis, this should have caused a transient drop in deep ocean CO3[2-] that was eventually reversed by seafloor dissolution of CaCO3. The resulting increase in whole-ocean pH may have had a significant impact on atmospheric CO2, compounding any decrease that was due to the initial vertical CO2 shift. The opposite hypothetically occurred during deglaciation, when CO2 was returned to the upper ocean (and atmosphere) and deep ocean CO3[2-] temporarily increased, followed by excess burial of CaCO3 and a drop in whole-ocean pH. The deep sea record of CaCO3 preservation appears to reflect these processes, with the largest excursion during deglaciation (as expected), but various factors make quantification of deep sea paleo-CO3[2-] difficult. Here we reconstruct deep equatorial Pacific CO3[2-] over the last glacial-interglacial cycle using benthic foraminiferal Zn/Ca, which is strongly affected by saturation state during calcite precipitation. Our data are in agreement with the CaCO3 compensation theory, including glacial CO3[2-] concentrations similar to (or slightly lower than) today, and a Termination I CO3[2-] peak of ~25-30 µmol kg**-1. The deglacial CO3[2-] rise precedes ice sheet melting, consistent with the timing of the atmospheric CO2 rise. A later portion of the peak could reflect removal of CO2 from the atmosphere-ocean system due to boreal forest regrowth. CaCO3 compensation alone may explain more than one third of the atmospheric CO2 lowering during glacial times. Dataset Ice Sheet PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-103.630000,-103.630000,-1.650000,-1.650000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Cadmium/Calcium ratio DEPTH sediment/rock Manganese/Calcium ratio PC Piston corer RC13 RC13-114 Robert Conrad Zinc/Calcium ratio |
spellingShingle |
Cadmium/Calcium ratio DEPTH sediment/rock Manganese/Calcium ratio PC Piston corer RC13 RC13-114 Robert Conrad Zinc/Calcium ratio Marchitto, Thomas M Lynch-Stieglitz, Jean Hemming, Sidney R Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
topic_facet |
Cadmium/Calcium ratio DEPTH sediment/rock Manganese/Calcium ratio PC Piston corer RC13 RC13-114 Robert Conrad Zinc/Calcium ratio |
description |
Benthic foraminiferal delta13C suggests that there was a net shift of isotopically light metabolic CO2 from the upper ocean into the deep ocean during the last glacial period. According to the 'CaCO3 compensation' hypothesis, this should have caused a transient drop in deep ocean CO3[2-] that was eventually reversed by seafloor dissolution of CaCO3. The resulting increase in whole-ocean pH may have had a significant impact on atmospheric CO2, compounding any decrease that was due to the initial vertical CO2 shift. The opposite hypothetically occurred during deglaciation, when CO2 was returned to the upper ocean (and atmosphere) and deep ocean CO3[2-] temporarily increased, followed by excess burial of CaCO3 and a drop in whole-ocean pH. The deep sea record of CaCO3 preservation appears to reflect these processes, with the largest excursion during deglaciation (as expected), but various factors make quantification of deep sea paleo-CO3[2-] difficult. Here we reconstruct deep equatorial Pacific CO3[2-] over the last glacial-interglacial cycle using benthic foraminiferal Zn/Ca, which is strongly affected by saturation state during calcite precipitation. Our data are in agreement with the CaCO3 compensation theory, including glacial CO3[2-] concentrations similar to (or slightly lower than) today, and a Termination I CO3[2-] peak of ~25-30 µmol kg**-1. The deglacial CO3[2-] rise precedes ice sheet melting, consistent with the timing of the atmospheric CO2 rise. A later portion of the peak could reflect removal of CO2 from the atmosphere-ocean system due to boreal forest regrowth. CaCO3 compensation alone may explain more than one third of the atmospheric CO2 lowering during glacial times. |
format |
Dataset |
author |
Marchitto, Thomas M Lynch-Stieglitz, Jean Hemming, Sidney R |
author_facet |
Marchitto, Thomas M Lynch-Stieglitz, Jean Hemming, Sidney R |
author_sort |
Marchitto, Thomas M |
title |
Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
title_short |
Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
title_full |
Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
title_fullStr |
Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
title_full_unstemmed |
Trace element ratios of Cibicidoides wuellerstorfi from sediment core RC13-114 (Appendix A) |
title_sort |
trace element ratios of cibicidoides wuellerstorfi from sediment core rc13-114 (appendix a) |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.712938 https://doi.org/10.1594/PANGAEA.712938 |
op_coverage |
LATITUDE: -1.650000 * LONGITUDE: -103.630000 * DATE/TIME START: 1970-04-29T00:00:00 * DATE/TIME END: 1970-04-29T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.010 m * MAXIMUM DEPTH, sediment/rock: 3.990 m |
long_lat |
ENVELOPE(-103.630000,-103.630000,-1.650000,-1.650000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Supplement to: Marchitto, Thomas M; Lynch-Stieglitz, Jean; Hemming, Sidney R (2005): Deep Pacific CaCO3 compensation and glacial-interglacial atmospheric CO2. Earth and Planetary Science Letters, 231(3-4), 317-336, https://doi.org/10.1016/j.epsl.2004.12.024 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.712938 https://doi.org/10.1594/PANGAEA.712938 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.712938 https://doi.org/10.1016/j.epsl.2004.12.024 |
_version_ |
1766031851867078656 |