Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions
The volume of the Antarctic continental ice sheet(s) varied substantially during the Oligocene and Miocene ( ∼ 34-5Ma) from smaller to substantially larger than today, both on million-year and on orbital timescales. However, reproduction through physical modeling of a dynamic response of the ice she...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
European Geosciences Union
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/214358 https://doi.org/10.5194/cp-14-1275-2018 https://doi.org/10.13039/501100003329 |
id |
ftcsic:oai:digital.csic.es:10261/214358 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/214358 2024-02-11T09:58:45+01:00 Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions Hartman, Julian D. Sangiorgi, Francesca Salabarnada, Ariadna Petersen, Francien Houben, Alexander, J. P. Schouten, Stefan Brinkhuis, Henk Escutia, Carlota Bijl, Peter K. Ministerio de Economía y Competitividad (España) 2018-09-04 http://hdl.handle.net/10261/214358 https://doi.org/10.5194/cp-14-1275-2018 https://doi.org/10.13039/501100003329 unknown European Geosciences Union #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-60451-C2-1-P Publisher's version http://dx.doi.org/10.5194/cp-14-1275-2018 Sí doi:10.5194/cp-14-1275-2018 issn: 1814-9332 Climate of the Past 14 (9): 1275-1297 (2018) http://hdl.handle.net/10261/214358 http://dx.doi.org/10.13039/501100003329 open artículo http://purl.org/coar/resource_type/c_6501 2018 ftcsic https://doi.org/10.5194/cp-14-1275-201810.13039/501100003329 2024-01-16T10:55:18Z The volume of the Antarctic continental ice sheet(s) varied substantially during the Oligocene and Miocene ( ∼ 34-5Ma) from smaller to substantially larger than today, both on million-year and on orbital timescales. However, reproduction through physical modeling of a dynamic response of the ice sheets to climate forcing remains problematic, suggesting the existence of complex feedback mechanisms between the cryosphere, ocean, and atmosphere systems. There is therefore an urgent need to improve the models for better predictions of these systems, including resulting potential future sea level change. To assess the interactions between the cryosphere, ocean, and atmosphere, knowledge of ancient sea surface conditions close to the Antarctic margin is essential. Here, we present a new TEX86-based sea surface water paleotemperature record measured on Oligocene sediments from Integrated Ocean Drilling Program (IODP) Site U1356, offshore Wilkes Land, East Antarctica. The new data are presented along with previously published Miocene temperatures from the same site. Together the data cover the interval between 34 and 11Ma and encompasses two hiatuses. This record allows us to accurately reconstruct the magnitude of sea surface temperature (SST) variability and trends on both million-year and glacial-interglacial timescales. On average, TEX values indicate SSTs ranging between 10 and 21°C during the Oligocene and Miocene, which is on the upper end of the few existing reconstructions from other high-latitude Southern Ocean sites. SST maxima occur around 30.5, 25, and 17Ma. Our record suggests generally warm to temperate ocean offshore Wilkes Land. Based on lithological alternations detected in the sedimentary record, which are assigned to glacial-interglacial deposits, a SST variability of 1.5-3.1°C at glacial-interglacial timescales can be established. This variability is slightly larger than that of deep-sea temperatures recorded in Mg/Ca data. Our reconstructed Oligocene temperature variability has implications for ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land Digital.CSIC (Spanish National Research Council) Antarctic East Antarctica Southern Ocean The Antarctic Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Climate of the Past 14 9 1275 1297 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
The volume of the Antarctic continental ice sheet(s) varied substantially during the Oligocene and Miocene ( ∼ 34-5Ma) from smaller to substantially larger than today, both on million-year and on orbital timescales. However, reproduction through physical modeling of a dynamic response of the ice sheets to climate forcing remains problematic, suggesting the existence of complex feedback mechanisms between the cryosphere, ocean, and atmosphere systems. There is therefore an urgent need to improve the models for better predictions of these systems, including resulting potential future sea level change. To assess the interactions between the cryosphere, ocean, and atmosphere, knowledge of ancient sea surface conditions close to the Antarctic margin is essential. Here, we present a new TEX86-based sea surface water paleotemperature record measured on Oligocene sediments from Integrated Ocean Drilling Program (IODP) Site U1356, offshore Wilkes Land, East Antarctica. The new data are presented along with previously published Miocene temperatures from the same site. Together the data cover the interval between 34 and 11Ma and encompasses two hiatuses. This record allows us to accurately reconstruct the magnitude of sea surface temperature (SST) variability and trends on both million-year and glacial-interglacial timescales. On average, TEX values indicate SSTs ranging between 10 and 21°C during the Oligocene and Miocene, which is on the upper end of the few existing reconstructions from other high-latitude Southern Ocean sites. SST maxima occur around 30.5, 25, and 17Ma. Our record suggests generally warm to temperate ocean offshore Wilkes Land. Based on lithological alternations detected in the sedimentary record, which are assigned to glacial-interglacial deposits, a SST variability of 1.5-3.1°C at glacial-interglacial timescales can be established. This variability is slightly larger than that of deep-sea temperatures recorded in Mg/Ca data. Our reconstructed Oligocene temperature variability has implications for ... |
author2 |
Ministerio de Economía y Competitividad (España) |
format |
Article in Journal/Newspaper |
author |
Hartman, Julian D. Sangiorgi, Francesca Salabarnada, Ariadna Petersen, Francien Houben, Alexander, J. P. Schouten, Stefan Brinkhuis, Henk Escutia, Carlota Bijl, Peter K. |
spellingShingle |
Hartman, Julian D. Sangiorgi, Francesca Salabarnada, Ariadna Petersen, Francien Houben, Alexander, J. P. Schouten, Stefan Brinkhuis, Henk Escutia, Carlota Bijl, Peter K. Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
author_facet |
Hartman, Julian D. Sangiorgi, Francesca Salabarnada, Ariadna Petersen, Francien Houben, Alexander, J. P. Schouten, Stefan Brinkhuis, Henk Escutia, Carlota Bijl, Peter K. |
author_sort |
Hartman, Julian D. |
title |
Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
title_short |
Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
title_full |
Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
title_fullStr |
Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
title_full_unstemmed |
Paleoceanography and ice sheet variability offshore Wilkes Land, Antarctica-Part 3: Insights from Oligocene-Miocene TEX86-based sea surface temperature reconstructions |
title_sort |
paleoceanography and ice sheet variability offshore wilkes land, antarctica-part 3: insights from oligocene-miocene tex86-based sea surface temperature reconstructions |
publisher |
European Geosciences Union |
publishDate |
2018 |
url |
http://hdl.handle.net/10261/214358 https://doi.org/10.5194/cp-14-1275-2018 https://doi.org/10.13039/501100003329 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctica Southern Ocean The Antarctic Wilkes Land |
geographic_facet |
Antarctic East Antarctica Southern Ocean The Antarctic Wilkes Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2014-60451-C2-1-P Publisher's version http://dx.doi.org/10.5194/cp-14-1275-2018 Sí doi:10.5194/cp-14-1275-2018 issn: 1814-9332 Climate of the Past 14 (9): 1275-1297 (2018) http://hdl.handle.net/10261/214358 http://dx.doi.org/10.13039/501100003329 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/cp-14-1275-201810.13039/501100003329 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
9 |
container_start_page |
1275 |
op_container_end_page |
1297 |
_version_ |
1790594504767569920 |