Completing a benthic-isotope record from ODP Site 198-1209
Studying the dynamics of past global warming events during the late Paleocene to middle Eocene informs our understanding of Earth's carbon cycle behavior under elevated atmospheric pCO2 conditions. Due to sparse data coverage, the spatial character of numerous hyperthermal events during this pe...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.883390 2023-05-15T13:44:47+02:00 Completing a benthic-isotope record from ODP Site 198-1209 Westerhold, Thomas Röhl, Ursula Donner, Barbara Zachos, James C MEDIAN LATITUDE: 32.474432 * MEDIAN LONGITUDE: 158.104632 * SOUTH-BOUND LATITUDE: 32.002183 * WEST-BOUND LONGITUDE: 157.723200 * NORTH-BOUND LATITUDE: 32.651700 * EAST-BOUND LONGITUDE: 158.505983 * DATE/TIME START: 1982-05-23T00:00:00 * DATE/TIME END: 2001-10-12T00:00:00 2017-11-22 application/zip, 12 datasets https://doi.pangaea.de/10.1594/PANGAEA.883390 https://doi.org/10.1594/PANGAEA.883390 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.883390 https://doi.org/10.1594/PANGAEA.883390 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Westerhold, Thomas; Röhl, Ursula; Donner, Barbara; Zachos, James C (2018): Global extent of early eocene hyperthermal events - a new Pacific benthic foraminiferal isotope record from Shatsky Rise (ODP Site 1209). Paleoceanography and Paleoclimatology, 33(6), 626-642, https://doi.org/10.1029/2017PA003306 Deep Sea Drilling Project DSDP Ocean Drilling Program ODP Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.883390 https://doi.org/10.1029/2017PA003306 2023-01-20T07:34:04Z Studying the dynamics of past global warming events during the late Paleocene to middle Eocene informs our understanding of Earth's carbon cycle behavior under elevated atmospheric pCO2 conditions. Due to sparse data coverage, the spatial character of numerous hyperthermal events during this period is still poorly constrained. Here we present a high‐resolution, benthic foraminiferal stable isotope record for northwest Pacific ODP Site 1209 (Leg 198) spanning 44 to 56 Ma with 5 kyr resolution. An existing Paleocene section was extended into the middle Eocene creating an unprecedented 22 myr single‐site record. Several identified carbon isotope excursions correspond in timing and magnitude to hyperthermal layers previously described elsewhere. Maxima in scanning XRF Fe intensities and pronounced minima in the wt% coarse fraction characterize carbonate dissolution for all of the hyperthermal events. The new astronomically‐calibrated stable oxygen isotope record assists in defining the onset, duration, and demise of the Early Eocene Climate Optimum (EECO, 49.14 to 53.26 Ma) and the onset of global cooling after the EECO (49.14 Ma). The cooling trend was interrupted by two warming episodes at 47.2 and 46.7 Ma. A major positive shift in the benthic foraminiferal carbon isotope record occurring from 51.2 to 51.0 Ma is now confirmed to be global. Benthic foraminiferal δ13C records from Atlantic and Pacific Oceans converge from 52.0 to 47.5 Ma pointing to a closer connection of deep‐water convection initiating well in advance of the final connection ~40 Ma ago or an increase in bottom water formation around Antarctica. Dataset Antarc* Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(157.723200,158.505983,32.651700,32.002183) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
spellingShingle |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP Westerhold, Thomas Röhl, Ursula Donner, Barbara Zachos, James C Completing a benthic-isotope record from ODP Site 198-1209 |
topic_facet |
Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
description |
Studying the dynamics of past global warming events during the late Paleocene to middle Eocene informs our understanding of Earth's carbon cycle behavior under elevated atmospheric pCO2 conditions. Due to sparse data coverage, the spatial character of numerous hyperthermal events during this period is still poorly constrained. Here we present a high‐resolution, benthic foraminiferal stable isotope record for northwest Pacific ODP Site 1209 (Leg 198) spanning 44 to 56 Ma with 5 kyr resolution. An existing Paleocene section was extended into the middle Eocene creating an unprecedented 22 myr single‐site record. Several identified carbon isotope excursions correspond in timing and magnitude to hyperthermal layers previously described elsewhere. Maxima in scanning XRF Fe intensities and pronounced minima in the wt% coarse fraction characterize carbonate dissolution for all of the hyperthermal events. The new astronomically‐calibrated stable oxygen isotope record assists in defining the onset, duration, and demise of the Early Eocene Climate Optimum (EECO, 49.14 to 53.26 Ma) and the onset of global cooling after the EECO (49.14 Ma). The cooling trend was interrupted by two warming episodes at 47.2 and 46.7 Ma. A major positive shift in the benthic foraminiferal carbon isotope record occurring from 51.2 to 51.0 Ma is now confirmed to be global. Benthic foraminiferal δ13C records from Atlantic and Pacific Oceans converge from 52.0 to 47.5 Ma pointing to a closer connection of deep‐water convection initiating well in advance of the final connection ~40 Ma ago or an increase in bottom water formation around Antarctica. |
format |
Dataset |
author |
Westerhold, Thomas Röhl, Ursula Donner, Barbara Zachos, James C |
author_facet |
Westerhold, Thomas Röhl, Ursula Donner, Barbara Zachos, James C |
author_sort |
Westerhold, Thomas |
title |
Completing a benthic-isotope record from ODP Site 198-1209 |
title_short |
Completing a benthic-isotope record from ODP Site 198-1209 |
title_full |
Completing a benthic-isotope record from ODP Site 198-1209 |
title_fullStr |
Completing a benthic-isotope record from ODP Site 198-1209 |
title_full_unstemmed |
Completing a benthic-isotope record from ODP Site 198-1209 |
title_sort |
completing a benthic-isotope record from odp site 198-1209 |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.883390 https://doi.org/10.1594/PANGAEA.883390 |
op_coverage |
MEDIAN LATITUDE: 32.474432 * MEDIAN LONGITUDE: 158.104632 * SOUTH-BOUND LATITUDE: 32.002183 * WEST-BOUND LONGITUDE: 157.723200 * NORTH-BOUND LATITUDE: 32.651700 * EAST-BOUND LONGITUDE: 158.505983 * DATE/TIME START: 1982-05-23T00:00:00 * DATE/TIME END: 2001-10-12T00:00:00 |
long_lat |
ENVELOPE(157.723200,158.505983,32.651700,32.002183) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Supplement to: Westerhold, Thomas; Röhl, Ursula; Donner, Barbara; Zachos, James C (2018): Global extent of early eocene hyperthermal events - a new Pacific benthic foraminiferal isotope record from Shatsky Rise (ODP Site 1209). Paleoceanography and Paleoclimatology, 33(6), 626-642, https://doi.org/10.1029/2017PA003306 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.883390 https://doi.org/10.1594/PANGAEA.883390 |
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.883390 https://doi.org/10.1029/2017PA003306 |
_version_ |
1766206605981908992 |