Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B
Spatiotemporal patterns of carbonate dissolution provide a critical constraint on carbon input during an ancient (~55.5 Ma) global warming event known as the Paleocene-Eocene thermal maximum (PETM), yet the magnitude of lysocline shoaling in the Southern Ocean is poorly constrained due to limited sp...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.787773 https://doi.org/10.1594/PANGAEA.787773 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.787773 2024-09-15T17:40:46+00:00 Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B Kelly, Daniel Clay Nielsen, Tina M J Schellenberg, Stephen A MEDIAN LATITUDE: -64.946333 * MEDIAN LONGITUDE: 1.836567 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: 1.204900 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.099900 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-01-21T07:00:00 2012 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.787773 https://doi.org/10.1594/PANGAEA.787773 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.787773 https://doi.org/10.1594/PANGAEA.787773 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Kelly, Daniel Clay; Nielsen, Tina M J; Schellenberg, Stephen A (2012): Carbonate saturation dynamics during the Paleocene-Eocene thermal maximum: Bathyal constraints from ODP sites 689 and 690 in the Weddell Sea (South Atlantic). Marine Geology, 303-306, 75-86, https://doi.org/10.1016/j.margeo.2012.02.003 Ocean Drilling Program ODP dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.78777310.1016/j.margeo.2012.02.003 2024-07-24T02:31:21Z Spatiotemporal patterns of carbonate dissolution provide a critical constraint on carbon input during an ancient (~55.5 Ma) global warming event known as the Paleocene-Eocene thermal maximum (PETM), yet the magnitude of lysocline shoaling in the Southern Ocean is poorly constrained due to limited spatial coverage in the circum-Antarctic region. This shortcoming is partially addressed by comparing patterns of carbonate sedimentation at the Site 690 PETM reference section to those herein reconstructed for nearby Site 689. Biochemostratigraphic correlation of the two records reveals that the first ~36 ka of the carbon isotope excursion (CIE) signaling PETM conditions is captured by the Site 689 section, while the remainder of the CIE interval and nearly all of the CIE recovery are missing due to a coring gap. A relatively expanded stratigraphy and higher carbonate content at mid-bathyal Site 689 indicate that dissolution was less severe than at Site 690. Thus, the bathymetric transect delimited by these two PETM records indicates that the lysocline shoaled above Site 689 (~1,100 m) while the calcite compensation depth remained below Site 690 (~1,900 m) in the Weddell Sea region. The ensuing recovery of carbonate sedimentation conforms to a bathymetric trend best explained by gradual lysocline deepening as negative feedback mechanisms neutralized ocean acidification. Further, biochemostratigraphic evidence indicates the tail end of the CIE recovery interval at both sites has been truncated by a hiatus most likely related to vigorous production and advection of intermediate waters. Other/Unknown Material Antarc* Antarctic Ocean acidification Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(1.204900,3.099900,-64.517000,-65.161000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Kelly, Daniel Clay Nielsen, Tina M J Schellenberg, Stephen A Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
topic_facet |
Ocean Drilling Program ODP |
description |
Spatiotemporal patterns of carbonate dissolution provide a critical constraint on carbon input during an ancient (~55.5 Ma) global warming event known as the Paleocene-Eocene thermal maximum (PETM), yet the magnitude of lysocline shoaling in the Southern Ocean is poorly constrained due to limited spatial coverage in the circum-Antarctic region. This shortcoming is partially addressed by comparing patterns of carbonate sedimentation at the Site 690 PETM reference section to those herein reconstructed for nearby Site 689. Biochemostratigraphic correlation of the two records reveals that the first ~36 ka of the carbon isotope excursion (CIE) signaling PETM conditions is captured by the Site 689 section, while the remainder of the CIE interval and nearly all of the CIE recovery are missing due to a coring gap. A relatively expanded stratigraphy and higher carbonate content at mid-bathyal Site 689 indicate that dissolution was less severe than at Site 690. Thus, the bathymetric transect delimited by these two PETM records indicates that the lysocline shoaled above Site 689 (~1,100 m) while the calcite compensation depth remained below Site 690 (~1,900 m) in the Weddell Sea region. The ensuing recovery of carbonate sedimentation conforms to a bathymetric trend best explained by gradual lysocline deepening as negative feedback mechanisms neutralized ocean acidification. Further, biochemostratigraphic evidence indicates the tail end of the CIE recovery interval at both sites has been truncated by a hiatus most likely related to vigorous production and advection of intermediate waters. |
format |
Other/Unknown Material |
author |
Kelly, Daniel Clay Nielsen, Tina M J Schellenberg, Stephen A |
author_facet |
Kelly, Daniel Clay Nielsen, Tina M J Schellenberg, Stephen A |
author_sort |
Kelly, Daniel Clay |
title |
Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
title_short |
Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
title_full |
Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
title_fullStr |
Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
title_full_unstemmed |
Analysis of an ancient global warming event, the Paleocene-Eocene thermal maximum, under examination from ODP Holes 113-689B and 113-690B |
title_sort |
analysis of an ancient global warming event, the paleocene-eocene thermal maximum, under examination from odp holes 113-689b and 113-690b |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.787773 https://doi.org/10.1594/PANGAEA.787773 |
op_coverage |
MEDIAN LATITUDE: -64.946333 * MEDIAN LONGITUDE: 1.836567 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: 1.204900 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.099900 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-01-21T07:00:00 |
long_lat |
ENVELOPE(1.204900,3.099900,-64.517000,-65.161000) |
genre |
Antarc* Antarctic Ocean acidification Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Ocean acidification Southern Ocean Weddell Sea |
op_source |
Supplement to: Kelly, Daniel Clay; Nielsen, Tina M J; Schellenberg, Stephen A (2012): Carbonate saturation dynamics during the Paleocene-Eocene thermal maximum: Bathyal constraints from ODP sites 689 and 690 in the Weddell Sea (South Atlantic). Marine Geology, 303-306, 75-86, https://doi.org/10.1016/j.margeo.2012.02.003 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.787773 https://doi.org/10.1594/PANGAEA.787773 |
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.78777310.1016/j.margeo.2012.02.003 |
_version_ |
1810486797101170688 |