Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ...
Increased export production (EP) in the Subantarctic Zone (SAZ) of the Southern Ocean due to iron fertilisation has been proposed as a key mechanism for explaining carbon drawdown during the last glacial maximum (LGM). This work reconstructs marine EP since the LGM at four sites around New Zealand....
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Online Access: | https://dx.doi.org/10.1594/pangaea.864678 https://doi.pangaea.de/10.1594/PANGAEA.864678 |
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ftdatacite:10.1594/pangaea.864678 2024-09-30T14:44:09+00:00 Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... Durand, Axel Chase, Zanna Noble, Taryn L Bostock, Helen C Jaccard, Samuel L Kitchener, Priya Townsend, Ashley T Jansen, Nils Kinsley, Les Jacobsen, Geraldine Johnson, Sean Neil, Helen L 2017 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.864678 https://doi.pangaea.de/10.1594/PANGAEA.864678 en eng PANGAEA https://dx.doi.org/10.1016/j.epsl.2017.03.035 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock AGE Thorium-232 Thorium-232, standard deviation Thorium-230 Thorium-230, standard deviation Uranium-238 Uranium-238, standard deviation Thorium-230 excess, decay-corrected Thorium-230 excess, decay-corrected, standard deviation Accumulation rate, sediment, mean per year Accumulation rate, sediment, standard deviation Lithogenic material Opal, biogenic silica Calcium carbonate Carbon, organic, total Iron Drilling/drill rig Gravity corer Kasten corer Core Calculated Leg90 SO136 TAN3034 TAN0803 Glomar Challenger Sonne Tangaroa Supplementary Dataset Dataset dataset 2017 ftdatacite https://doi.org/10.1594/pangaea.86467810.1016/j.epsl.2017.03.035 2024-09-02T08:38:04Z Increased export production (EP) in the Subantarctic Zone (SAZ) of the Southern Ocean due to iron fertilisation has been proposed as a key mechanism for explaining carbon drawdown during the last glacial maximum (LGM). This work reconstructs marine EP since the LGM at four sites around New Zealand. For the first time in this region, 230-Thorium-normalised fluxes of biogenic opal, carbonate, excess barium, and organic carbon are presented. In Subtropical Waters and the SAZ, these flux variations show that EP has not changed markedly since the LGM. The only exception is a site currently north of the subtropical front. Here we suggest the subtropical front shifted over the core site between 18 and 12 ka, driving increased EP. To understand why EP remained mostly low and constant elsewhere, lithogenic fluxes at the four sites were measured to investigate changes in dust deposition. At all sites, lithogenic fluxes were greater during the LGM compared to the Holocene. The positive temporal correlation between the ... : Supplement to: Durand, Axel; Chase, Zanna; Noble, Taryn L; Bostock, Helen C; Jaccard, Samuel L; Kitchener, Priya; Townsend, Ashley T; Jansen, Nils; Kinsley, Les; Jacobsen, Geraldine; Johnson, Sean; Neil, Helen L (2017): Export production in the New-Zealand region since the Last Glacial Maximum. Earth and Planetary Science Letters, 469, 110-122 ... Dataset Southern Ocean DataCite New Zealand Nils ENVELOPE(48.017,48.017,-68.067,-68.067) Pacific Southern Ocean |
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Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock AGE Thorium-232 Thorium-232, standard deviation Thorium-230 Thorium-230, standard deviation Uranium-238 Uranium-238, standard deviation Thorium-230 excess, decay-corrected Thorium-230 excess, decay-corrected, standard deviation Accumulation rate, sediment, mean per year Accumulation rate, sediment, standard deviation Lithogenic material Opal, biogenic silica Calcium carbonate Carbon, organic, total Iron Drilling/drill rig Gravity corer Kasten corer Core Calculated Leg90 SO136 TAN3034 TAN0803 Glomar Challenger Sonne Tangaroa |
spellingShingle |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock AGE Thorium-232 Thorium-232, standard deviation Thorium-230 Thorium-230, standard deviation Uranium-238 Uranium-238, standard deviation Thorium-230 excess, decay-corrected Thorium-230 excess, decay-corrected, standard deviation Accumulation rate, sediment, mean per year Accumulation rate, sediment, standard deviation Lithogenic material Opal, biogenic silica Calcium carbonate Carbon, organic, total Iron Drilling/drill rig Gravity corer Kasten corer Core Calculated Leg90 SO136 TAN3034 TAN0803 Glomar Challenger Sonne Tangaroa Durand, Axel Chase, Zanna Noble, Taryn L Bostock, Helen C Jaccard, Samuel L Kitchener, Priya Townsend, Ashley T Jansen, Nils Kinsley, Les Jacobsen, Geraldine Johnson, Sean Neil, Helen L Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
topic_facet |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, sediment/rock AGE Thorium-232 Thorium-232, standard deviation Thorium-230 Thorium-230, standard deviation Uranium-238 Uranium-238, standard deviation Thorium-230 excess, decay-corrected Thorium-230 excess, decay-corrected, standard deviation Accumulation rate, sediment, mean per year Accumulation rate, sediment, standard deviation Lithogenic material Opal, biogenic silica Calcium carbonate Carbon, organic, total Iron Drilling/drill rig Gravity corer Kasten corer Core Calculated Leg90 SO136 TAN3034 TAN0803 Glomar Challenger Sonne Tangaroa |
description |
Increased export production (EP) in the Subantarctic Zone (SAZ) of the Southern Ocean due to iron fertilisation has been proposed as a key mechanism for explaining carbon drawdown during the last glacial maximum (LGM). This work reconstructs marine EP since the LGM at four sites around New Zealand. For the first time in this region, 230-Thorium-normalised fluxes of biogenic opal, carbonate, excess barium, and organic carbon are presented. In Subtropical Waters and the SAZ, these flux variations show that EP has not changed markedly since the LGM. The only exception is a site currently north of the subtropical front. Here we suggest the subtropical front shifted over the core site between 18 and 12 ka, driving increased EP. To understand why EP remained mostly low and constant elsewhere, lithogenic fluxes at the four sites were measured to investigate changes in dust deposition. At all sites, lithogenic fluxes were greater during the LGM compared to the Holocene. The positive temporal correlation between the ... : Supplement to: Durand, Axel; Chase, Zanna; Noble, Taryn L; Bostock, Helen C; Jaccard, Samuel L; Kitchener, Priya; Townsend, Ashley T; Jansen, Nils; Kinsley, Les; Jacobsen, Geraldine; Johnson, Sean; Neil, Helen L (2017): Export production in the New-Zealand region since the Last Glacial Maximum. Earth and Planetary Science Letters, 469, 110-122 ... |
format |
Dataset |
author |
Durand, Axel Chase, Zanna Noble, Taryn L Bostock, Helen C Jaccard, Samuel L Kitchener, Priya Townsend, Ashley T Jansen, Nils Kinsley, Les Jacobsen, Geraldine Johnson, Sean Neil, Helen L |
author_facet |
Durand, Axel Chase, Zanna Noble, Taryn L Bostock, Helen C Jaccard, Samuel L Kitchener, Priya Townsend, Ashley T Jansen, Nils Kinsley, Les Jacobsen, Geraldine Johnson, Sean Neil, Helen L |
author_sort |
Durand, Axel |
title |
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
title_short |
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
title_full |
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
title_fullStr |
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
title_full_unstemmed |
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux ... |
title_sort |
age, 232th, 230th, 238u, caco3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest pacific, with calculated 230th-normalized mass flux ... |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://dx.doi.org/10.1594/pangaea.864678 https://doi.pangaea.de/10.1594/PANGAEA.864678 |
long_lat |
ENVELOPE(48.017,48.017,-68.067,-68.067) |
geographic |
New Zealand Nils Pacific Southern Ocean |
geographic_facet |
New Zealand Nils Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.epsl.2017.03.035 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.86467810.1016/j.epsl.2017.03.035 |
_version_ |
1811645614229815296 |