(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A
everal hypotheses have been put forward to explain the onset of intensive glaciations on Greenland, Scandinavia, and North America during the Pliocene epoch between 3.6 and 2.7 million years ago (Ma). A decrease in atmospheric CO2 may have played a role during the onset of glaciations, but other tec...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.829486 2024-09-15T18:09:36+00:00 (Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A Bartoli, Gretta Hönisch, Bärbel Zeebe, Richard E LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 64.74 m * MAXIMUM DEPTH, sediment/rock: 140.78 m 2011 text/tab-separated-values, 659 data points https://doi.pangaea.de/10.1594/PANGAEA.829486 https://doi.org/10.1594/PANGAEA.829486 en eng PANGAEA Boron isotope ratios of ODP Hole 165-999A, supplement (URI: hdl:10013/epic.43018.d001) https://doi.pangaea.de/10.1594/PANGAEA.829486 https://doi.org/10.1594/PANGAEA.829486 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Bartoli, Gretta; Hönisch, Bärbel; Zeebe, Richard E (2011): Atmospheric CO2 decline during the Pliocene intensification of Northern Hemisphere glaciations. Paleoceanography, 26(4), PA4213, https://doi.org/10.1029/2010PA002055 165-999A AGE Caribbean Sea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer weight δ11B standard error Isotopic event Joides Resolution Leg165 Method comment Ocean Drilling Program ODP Sample code/label Size fraction dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.82948610.1029/2010PA002055 2024-07-24T02:31:32Z everal hypotheses have been put forward to explain the onset of intensive glaciations on Greenland, Scandinavia, and North America during the Pliocene epoch between 3.6 and 2.7 million years ago (Ma). A decrease in atmospheric CO2 may have played a role during the onset of glaciations, but other tectonic and oceanic events occurring at the same time may have played a part as well. Here we present detailed atmospheric CO2 estimates from boron isotopes in planktic foraminifer shells spanning 4.6-2.0 Ma. Maximal Pliocene atmospheric CO2 estimates gradually declined from values around 410 µatm to early Pleistocene values of 300 matm at 2.0 Ma. After the onset of large-scale ice sheets in the Northern Hemisphere, maximal pCO2 estimates were still at 2.5 Ma +90 µatm higher than values characteristic of the early Pleistocene interglacials. By contrast, Pliocene minimal atmospheric CO2 gradually decreased from 310 to 245 µatm at 3.2 Ma, coinciding with the start of transient glaciations on Greenland. Values characteristic of early Pleistocene glacial atmospheric CO2 of 200 matm were abruptly reached after 2.7 Ma during the late Pliocene transition. This trend is consistent with the suggestion that ocean stratification and iron fertilization increased after 2.7 Ma in the North Pacific and Southern Ocean and may have led to increased glacial CO2 storage in the oceanic abyss after 2.7 Ma onward. Dataset Greenland Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
165-999A AGE Caribbean Sea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer weight δ11B standard error Isotopic event Joides Resolution Leg165 Method comment Ocean Drilling Program ODP Sample code/label Size fraction |
spellingShingle |
165-999A AGE Caribbean Sea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer weight δ11B standard error Isotopic event Joides Resolution Leg165 Method comment Ocean Drilling Program ODP Sample code/label Size fraction Bartoli, Gretta Hönisch, Bärbel Zeebe, Richard E (Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
topic_facet |
165-999A AGE Caribbean Sea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Globigerinoides sacculifer weight δ11B standard error Isotopic event Joides Resolution Leg165 Method comment Ocean Drilling Program ODP Sample code/label Size fraction |
description |
everal hypotheses have been put forward to explain the onset of intensive glaciations on Greenland, Scandinavia, and North America during the Pliocene epoch between 3.6 and 2.7 million years ago (Ma). A decrease in atmospheric CO2 may have played a role during the onset of glaciations, but other tectonic and oceanic events occurring at the same time may have played a part as well. Here we present detailed atmospheric CO2 estimates from boron isotopes in planktic foraminifer shells spanning 4.6-2.0 Ma. Maximal Pliocene atmospheric CO2 estimates gradually declined from values around 410 µatm to early Pleistocene values of 300 matm at 2.0 Ma. After the onset of large-scale ice sheets in the Northern Hemisphere, maximal pCO2 estimates were still at 2.5 Ma +90 µatm higher than values characteristic of the early Pleistocene interglacials. By contrast, Pliocene minimal atmospheric CO2 gradually decreased from 310 to 245 µatm at 3.2 Ma, coinciding with the start of transient glaciations on Greenland. Values characteristic of early Pleistocene glacial atmospheric CO2 of 200 matm were abruptly reached after 2.7 Ma during the late Pliocene transition. This trend is consistent with the suggestion that ocean stratification and iron fertilization increased after 2.7 Ma in the North Pacific and Southern Ocean and may have led to increased glacial CO2 storage in the oceanic abyss after 2.7 Ma onward. |
format |
Dataset |
author |
Bartoli, Gretta Hönisch, Bärbel Zeebe, Richard E |
author_facet |
Bartoli, Gretta Hönisch, Bärbel Zeebe, Richard E |
author_sort |
Bartoli, Gretta |
title |
(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
title_short |
(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
title_full |
(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
title_fullStr |
(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
title_full_unstemmed |
(Table S1) Globigerinoides sacculifer Boron isotope ratios of ODP Hole 165-999A |
title_sort |
(table s1) globigerinoides sacculifer boron isotope ratios of odp hole 165-999a |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.829486 https://doi.org/10.1594/PANGAEA.829486 |
op_coverage |
LATITUDE: 12.744000 * LONGITUDE: -78.739300 * DATE/TIME START: 1996-01-10T19:30:00 * DATE/TIME END: 1996-01-14T23:15:00 * MINIMUM DEPTH, sediment/rock: 64.74 m * MAXIMUM DEPTH, sediment/rock: 140.78 m |
long_lat |
ENVELOPE(-78.739300,-78.739300,12.744000,12.744000) |
genre |
Greenland Southern Ocean |
genre_facet |
Greenland Southern Ocean |
op_source |
Supplement to: Bartoli, Gretta; Hönisch, Bärbel; Zeebe, Richard E (2011): Atmospheric CO2 decline during the Pliocene intensification of Northern Hemisphere glaciations. Paleoceanography, 26(4), PA4213, https://doi.org/10.1029/2010PA002055 |
op_relation |
Boron isotope ratios of ODP Hole 165-999A, supplement (URI: hdl:10013/epic.43018.d001) https://doi.pangaea.de/10.1594/PANGAEA.829486 https://doi.org/10.1594/PANGAEA.829486 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.82948610.1029/2010PA002055 |
_version_ |
1810447182557347840 |