Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand
Glacial/interglacial changes in Southern Ocean's air-sea gas exchange have been considered as important mechanisms contributing to the glacial/interglacial variability in atmospheric CO2. Hence, understanding past variability in Southern Ocean intermediate- to deep-water chemistry and circulati...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.835498 2023-05-15T13:42:11+02:00 Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand Ronge, Thomas A Steph, Silke Tiedemann, Ralf Prange, Matthias Merkel, Ute Nürnberg, Dirk Kuhn, Gerhard MEDIAN LATITUDE: -43.955777 * MEDIAN LONGITUDE: 171.977754 * SOUTH-BOUND LATITUDE: -45.777550 * WEST-BOUND LONGITUDE: 167.900000 * NORTH-BOUND LATITUDE: -42.295700 * EAST-BOUND LONGITUDE: 176.602030 * DATE/TIME START: 1998-10-17T20:55:00 * DATE/TIME END: 2011-03-04T13:15:00 2015-01-17 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.835498 https://doi.org/10.1594/PANGAEA.835498 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.835498 https://doi.org/10.1594/PANGAEA.835498 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Ronge, Thomas A; Steph, Silke; Tiedemann, Ralf; Prange, Matthias; Merkel, Ute; Nürnberg, Dirk; Kuhn, Gerhard (2015): Pushing the boundaries: Glacial/interglacial variability of intermediate and deep waters in the southwest Pacific over the last 350,000 years. Paleoceanography, 30(2), 23-38, https://doi.org/10.1002/2014PA002727 AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.835498 https://doi.org/10.1002/2014PA002727 2023-01-20T07:33:20Z Glacial/interglacial changes in Southern Ocean's air-sea gas exchange have been considered as important mechanisms contributing to the glacial/interglacial variability in atmospheric CO2. Hence, understanding past variability in Southern Ocean intermediate- to deep-water chemistry and circulation is fundamental to constrain the role of these processes on modulating glacial/interglacial changes in the global carbon cycle. Our study focused on the glacial/interglacial variability in the vertical extent of southwest Pacific Antarctic Intermediate Water (AAIW). We compared carbon and oxygen isotope records from epibenthic foraminifera of sediment cores bathed in modern AAIW and Upper Circumpolar Deep Water (UCDW; 943 - 2066 m water depth) to monitor changes in water mass circulation spanning the past 350,000 years. We propose that pronounced freshwater input by melting sea ice into the glacial AAIW significantly hampered the downward expansion of southwest Pacific AAIW, consistent with climate model results for the Last Glacial Maximum. This process led to a pronounced upward displacement of the AAIW-UCDW interface during colder climate conditions and therefore to an expansion of the glacial carbon pool. Dataset Antarc* Antarctic Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean Pacific New Zealand Bounty Trough ENVELOPE(178.070,178.070,-45.499,-45.499) ENVELOPE(167.900000,176.602030,-42.295700,-45.777550) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Ronge, Thomas A Steph, Silke Tiedemann, Ralf Prange, Matthias Merkel, Ute Nürnberg, Dirk Kuhn, Gerhard Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
description |
Glacial/interglacial changes in Southern Ocean's air-sea gas exchange have been considered as important mechanisms contributing to the glacial/interglacial variability in atmospheric CO2. Hence, understanding past variability in Southern Ocean intermediate- to deep-water chemistry and circulation is fundamental to constrain the role of these processes on modulating glacial/interglacial changes in the global carbon cycle. Our study focused on the glacial/interglacial variability in the vertical extent of southwest Pacific Antarctic Intermediate Water (AAIW). We compared carbon and oxygen isotope records from epibenthic foraminifera of sediment cores bathed in modern AAIW and Upper Circumpolar Deep Water (UCDW; 943 - 2066 m water depth) to monitor changes in water mass circulation spanning the past 350,000 years. We propose that pronounced freshwater input by melting sea ice into the glacial AAIW significantly hampered the downward expansion of southwest Pacific AAIW, consistent with climate model results for the Last Glacial Maximum. This process led to a pronounced upward displacement of the AAIW-UCDW interface during colder climate conditions and therefore to an expansion of the glacial carbon pool. |
format |
Dataset |
author |
Ronge, Thomas A Steph, Silke Tiedemann, Ralf Prange, Matthias Merkel, Ute Nürnberg, Dirk Kuhn, Gerhard |
author_facet |
Ronge, Thomas A Steph, Silke Tiedemann, Ralf Prange, Matthias Merkel, Ute Nürnberg, Dirk Kuhn, Gerhard |
author_sort |
Ronge, Thomas A |
title |
Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
title_short |
Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
title_full |
Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
title_fullStr |
Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
title_full_unstemmed |
Bulk properties and isotopic data of sediment cores from the Bounty Trough and Tasman Sea off New Zealand |
title_sort |
bulk properties and isotopic data of sediment cores from the bounty trough and tasman sea off new zealand |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.835498 https://doi.org/10.1594/PANGAEA.835498 |
op_coverage |
MEDIAN LATITUDE: -43.955777 * MEDIAN LONGITUDE: 171.977754 * SOUTH-BOUND LATITUDE: -45.777550 * WEST-BOUND LONGITUDE: 167.900000 * NORTH-BOUND LATITUDE: -42.295700 * EAST-BOUND LONGITUDE: 176.602030 * DATE/TIME START: 1998-10-17T20:55:00 * DATE/TIME END: 2011-03-04T13:15:00 |
long_lat |
ENVELOPE(178.070,178.070,-45.499,-45.499) ENVELOPE(167.900000,176.602030,-42.295700,-45.777550) |
geographic |
Antarctic Southern Ocean Pacific New Zealand Bounty Trough |
geographic_facet |
Antarctic Southern Ocean Pacific New Zealand Bounty Trough |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Supplement to: Ronge, Thomas A; Steph, Silke; Tiedemann, Ralf; Prange, Matthias; Merkel, Ute; Nürnberg, Dirk; Kuhn, Gerhard (2015): Pushing the boundaries: Glacial/interglacial variability of intermediate and deep waters in the southwest Pacific over the last 350,000 years. Paleoceanography, 30(2), 23-38, https://doi.org/10.1002/2014PA002727 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.835498 https://doi.org/10.1594/PANGAEA.835498 |
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.835498 https://doi.org/10.1002/2014PA002727 |
_version_ |
1766164660427423744 |