Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55
Carbon isotopic records of nutrient-depleted surface water place constraints on the past fertility of the oceans and on past atmospheric pCO2 levels. The best records of nutrient-depleted delta13C are obtained from planktonic foraminifera living in the thick mixed layers of the western equatorial an...
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PANGAEA - Data Publisher for Earth & Environmental Science
1987
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ftdatacite:10.1594/pangaea.692012 2023-05-15T16:39:23+02:00 Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 Curry, William B Crowley, Thomas J 1987 application/zip https://dx.doi.org/10.1594/pangaea.692012 https://doi.pangaea.de/10.1594/PANGAEA.692012 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/pa004i001p00019 https://dx.doi.org/10.1029/pa002i005p00489 https://dx.doi.org/10.1007/978-94-009-2446-8_7 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Calculation Gravity corer Gravity corer Kiel type Piston corer Leg68 EN06601 M51 KN11002 V25 Glomar Challenger Endeavor Meteor 1964 Knorr Vema Deep Sea Drilling Project DSDP Spectral Mapping Project Mapping Species Variability in Global Climate SPECMAP article Supplementary Collection of Datasets Collection 1987 ftdatacite https://doi.org/10.1594/pangaea.692012 https://doi.org/10.1029/pa004i001p00019 https://doi.org/10.1029/pa002i005p00489 https://doi.org/10.1007/978-94-009-2446-8_7 2022-02-09T13:29:49Z Carbon isotopic records of nutrient-depleted surface water place constraints on the past fertility of the oceans and on past atmospheric pCO2 levels. The best records of nutrient-depleted delta13C are obtained from planktonic foraminifera living in the thick mixed layers of the western equatorial and tropical Atlantic Ocean. We have produced a composite, stacked Globigerinoides sacculifer delta13C record from the equatorial Atlantic, which exhibits significant spectral power at the 100,000- and 41,000-year Milankovitch periods, but no power at the 23,000-year period. Similar to the record presented by Shackleton and Pisias [1985], surface-deep ocean Delta delta13C produced with the G. sacculifer record leads the delta18O ice volume record. However, the glacial-interglacial amplitudes of Delta delta13C differ between our record and Shackleton and Pisias [1985] record. Although large changes in Delta delta13C occur in the equatorial Atlantic during early stages of the last three glacial cycles, surface-deep Delta delta13C at glacial maxima (18O stage 2, late stage 6, and late stage 8) was only about 0.2‰ greater than during the subsequent interglacial. Our results imply that nutrient-driven pCO2 changes account for about one third of the pCO2 decrease observed in ice cores, and consequently, Delta delta13C should not be used as a proxy pCO2 index. Enough variance in the ice core pCO2 records remains to be explained that conclusions about pCO2 and ice volume phase relationships should also be reexamined. As much as 40 ppm pCO2 change still has not been accounted for by models of past physics and chemistry of the ocean. Article in Journal/Newspaper ice core Planktonic foraminifera DataCite Metadata Store (German National Library of Science and Technology) McIntyre ENVELOPE(-153.000,-153.000,-87.283,-87.283) Shackleton |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Calculation Gravity corer Gravity corer Kiel type Piston corer Leg68 EN06601 M51 KN11002 V25 Glomar Challenger Endeavor Meteor 1964 Knorr Vema Deep Sea Drilling Project DSDP Spectral Mapping Project Mapping Species Variability in Global Climate SPECMAP |
spellingShingle |
Drilling/drill rig Calculation Gravity corer Gravity corer Kiel type Piston corer Leg68 EN06601 M51 KN11002 V25 Glomar Challenger Endeavor Meteor 1964 Knorr Vema Deep Sea Drilling Project DSDP Spectral Mapping Project Mapping Species Variability in Global Climate SPECMAP Curry, William B Crowley, Thomas J Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
topic_facet |
Drilling/drill rig Calculation Gravity corer Gravity corer Kiel type Piston corer Leg68 EN06601 M51 KN11002 V25 Glomar Challenger Endeavor Meteor 1964 Knorr Vema Deep Sea Drilling Project DSDP Spectral Mapping Project Mapping Species Variability in Global Climate SPECMAP |
description |
Carbon isotopic records of nutrient-depleted surface water place constraints on the past fertility of the oceans and on past atmospheric pCO2 levels. The best records of nutrient-depleted delta13C are obtained from planktonic foraminifera living in the thick mixed layers of the western equatorial and tropical Atlantic Ocean. We have produced a composite, stacked Globigerinoides sacculifer delta13C record from the equatorial Atlantic, which exhibits significant spectral power at the 100,000- and 41,000-year Milankovitch periods, but no power at the 23,000-year period. Similar to the record presented by Shackleton and Pisias [1985], surface-deep ocean Delta delta13C produced with the G. sacculifer record leads the delta18O ice volume record. However, the glacial-interglacial amplitudes of Delta delta13C differ between our record and Shackleton and Pisias [1985] record. Although large changes in Delta delta13C occur in the equatorial Atlantic during early stages of the last three glacial cycles, surface-deep Delta delta13C at glacial maxima (18O stage 2, late stage 6, and late stage 8) was only about 0.2‰ greater than during the subsequent interglacial. Our results imply that nutrient-driven pCO2 changes account for about one third of the pCO2 decrease observed in ice cores, and consequently, Delta delta13C should not be used as a proxy pCO2 index. Enough variance in the ice core pCO2 records remains to be explained that conclusions about pCO2 and ice volume phase relationships should also be reexamined. As much as 40 ppm pCO2 change still has not been accounted for by models of past physics and chemistry of the ocean. |
format |
Article in Journal/Newspaper |
author |
Curry, William B Crowley, Thomas J |
author_facet |
Curry, William B Crowley, Thomas J |
author_sort |
Curry, William B |
title |
Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
title_short |
Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
title_full |
Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
title_fullStr |
Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
title_full_unstemmed |
Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic, supplement to: McIntyre, Andrew; Ruddiman, William F; Karlin, K; Mix, Alan C (1989): Surface water response of the Equatorial Atlantic Ocean to orbital forcing. Paleoceanography, 4(1), 19-55 |
title_sort |
stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial atlantic, supplement to: mcintyre, andrew; ruddiman, william f; karlin, k; mix, alan c (1989): surface water response of the equatorial atlantic ocean to orbital forcing. paleoceanography, 4(1), 19-55 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1987 |
url |
https://dx.doi.org/10.1594/pangaea.692012 https://doi.pangaea.de/10.1594/PANGAEA.692012 |
long_lat |
ENVELOPE(-153.000,-153.000,-87.283,-87.283) |
geographic |
McIntyre Shackleton |
geographic_facet |
McIntyre Shackleton |
genre |
ice core Planktonic foraminifera |
genre_facet |
ice core Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1029/pa004i001p00019 https://dx.doi.org/10.1029/pa002i005p00489 https://dx.doi.org/10.1007/978-94-009-2446-8_7 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.692012 https://doi.org/10.1029/pa004i001p00019 https://doi.org/10.1029/pa002i005p00489 https://doi.org/10.1007/978-94-009-2446-8_7 |
_version_ |
1766029729524088832 |