Stable isotope record and sediment composition of the subantarctic Pacific
Benthic foraminiferal stable carbon isotope records from the South Atlantic show significant declines toward more "Pacific-like" values at ~7 and ~2.7 Ma, and it has been posited that these shifts may mark steps toward increased CO2 sequestration in the deep Southern Ocean as climate coole...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.831703 2023-05-15T18:24:04+02:00 Stable isotope record and sediment composition of the subantarctic Pacific Waddell, Lindsey M Hendy, Ingrid L Moore, Theodore C Lyle, Mitchell W MEDIAN LATITUDE: -50.183150 * MEDIAN LONGITUDE: -169.691850 * SOUTH-BOUND LATITUDE: -50.333300 * WEST-BOUND LONGITUDE: 148.133300 * NORTH-BOUND LATITUDE: -50.033000 * EAST-BOUND LONGITUDE: -127.517000 * DATE/TIME START: 1966-01-01T00:00:00 * DATE/TIME END: 1966-01-01T00:00:00 2009-04-11 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.831703 https://doi.org/10.1594/PANGAEA.831703 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.831703 https://doi.org/10.1594/PANGAEA.831703 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Waddell, Lindsey M; Hendy, Ingrid L; Moore, Theodore C; Lyle, Mitchell W (2009): Ventilation of the abyssal Southern Ocean during the late Neogene: A new perspective from the subantarctic Pacific. Paleoceanography, 24(3), PA3206, https://doi.org/10.1029/2008PA001661 Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.831703 https://doi.org/10.1029/2008PA001661 2023-01-20T07:33:16Z Benthic foraminiferal stable carbon isotope records from the South Atlantic show significant declines toward more "Pacific-like" values at ~7 and ~2.7 Ma, and it has been posited that these shifts may mark steps toward increased CO2 sequestration in the deep Southern Ocean as climate cooled over the late Neogene. We generated new stable isotope records from abyssal subantarctic Pacific cores MV0502-4JC and ELT 25-11. The record from MV0502-4JC suggests that the Southern Ocean remained well mixed and free of vertical or interbasinal d13C gradients following the late Miocene carbon shift (LMCS). According to the records from MV0502-4JC and ELT 25-11, however, cold, low d13C bottom waters developed in the Southern Ocean in the late Pliocene and persisted until ~1.7 Ma. These new data suggest that while conditions in the abyssal Southern Ocean following the LMCS were comparable to the present day, sequestration of respired CO2 may have increased in the deepest parts of the Southern Ocean during the late Pliocene, a critical period for the growth and establishment of the Northern Hemisphere ice sheets. Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Pacific ENVELOPE(148.133300,-127.517000,-50.033000,-50.333300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Benthic foraminiferal stable carbon isotope records from the South Atlantic show significant declines toward more "Pacific-like" values at ~7 and ~2.7 Ma, and it has been posited that these shifts may mark steps toward increased CO2 sequestration in the deep Southern Ocean as climate cooled over the late Neogene. We generated new stable isotope records from abyssal subantarctic Pacific cores MV0502-4JC and ELT 25-11. The record from MV0502-4JC suggests that the Southern Ocean remained well mixed and free of vertical or interbasinal d13C gradients following the late Miocene carbon shift (LMCS). According to the records from MV0502-4JC and ELT 25-11, however, cold, low d13C bottom waters developed in the Southern Ocean in the late Pliocene and persisted until ~1.7 Ma. These new data suggest that while conditions in the abyssal Southern Ocean following the LMCS were comparable to the present day, sequestration of respired CO2 may have increased in the deepest parts of the Southern Ocean during the late Pliocene, a critical period for the growth and establishment of the Northern Hemisphere ice sheets. |
format |
Dataset |
author |
Waddell, Lindsey M Hendy, Ingrid L Moore, Theodore C Lyle, Mitchell W |
spellingShingle |
Waddell, Lindsey M Hendy, Ingrid L Moore, Theodore C Lyle, Mitchell W Stable isotope record and sediment composition of the subantarctic Pacific |
author_facet |
Waddell, Lindsey M Hendy, Ingrid L Moore, Theodore C Lyle, Mitchell W |
author_sort |
Waddell, Lindsey M |
title |
Stable isotope record and sediment composition of the subantarctic Pacific |
title_short |
Stable isotope record and sediment composition of the subantarctic Pacific |
title_full |
Stable isotope record and sediment composition of the subantarctic Pacific |
title_fullStr |
Stable isotope record and sediment composition of the subantarctic Pacific |
title_full_unstemmed |
Stable isotope record and sediment composition of the subantarctic Pacific |
title_sort |
stable isotope record and sediment composition of the subantarctic pacific |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.831703 https://doi.org/10.1594/PANGAEA.831703 |
op_coverage |
MEDIAN LATITUDE: -50.183150 * MEDIAN LONGITUDE: -169.691850 * SOUTH-BOUND LATITUDE: -50.333300 * WEST-BOUND LONGITUDE: 148.133300 * NORTH-BOUND LATITUDE: -50.033000 * EAST-BOUND LONGITUDE: -127.517000 * DATE/TIME START: 1966-01-01T00:00:00 * DATE/TIME END: 1966-01-01T00:00:00 |
long_lat |
ENVELOPE(148.133300,-127.517000,-50.033000,-50.333300) |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Waddell, Lindsey M; Hendy, Ingrid L; Moore, Theodore C; Lyle, Mitchell W (2009): Ventilation of the abyssal Southern Ocean during the late Neogene: A new perspective from the subantarctic Pacific. Paleoceanography, 24(3), PA3206, https://doi.org/10.1029/2008PA001661 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.831703 https://doi.org/10.1594/PANGAEA.831703 |
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.831703 https://doi.org/10.1029/2008PA001661 |
_version_ |
1766204359108984832 |