South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213
Despite its enormous extent and importance for global climate, the South Pacific has been poorly investigated in comparison to other regions with respect to chemical oceanography. Here we present the first detailed analysis of dissolved radiogenic Nd isotopes (epsilon-Nd) and rare earth elements (RE...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.825657 2023-05-15T13:42:11+02:00 South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 Molina-Kescher, Mario Frank, Martin Hathorne, Ed C MEDIAN LATITUDE: -42.009952 * MEDIAN LONGITUDE: -127.209103 * SOUTH-BOUND LATITUDE: -46.244950 * WEST-BOUND LONGITUDE: 179.569480 * NORTH-BOUND LATITUDE: -36.334500 * EAST-BOUND LONGITUDE: -79.916500 * DATE/TIME START: 2010-12-31T18:26:00 * DATE/TIME END: 2011-03-01T00:22:00 2014-01-09 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.825657 https://doi.org/10.1594/PANGAEA.825657 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.825657 https://doi.org/10.1594/PANGAEA.825657 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Molina-Kescher, Mario; Frank, Martin; Hathorne, Ed C (2013): South Pacific dissolved Nd isotope compositions and rare earth element distributions: Water mass mixing versus biogeochemical cycling. Geochimica et Cosmochimica Acta, 127, 171-189, https://doi.org/10.1016/j.gca.2013.11.038 Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.825657 https://doi.org/10.1016/j.gca.2013.11.038 2023-01-20T07:33:12Z Despite its enormous extent and importance for global climate, the South Pacific has been poorly investigated in comparison to other regions with respect to chemical oceanography. Here we present the first detailed analysis of dissolved radiogenic Nd isotopes (epsilon-Nd) and rare earth elements (REEs) in intermediate and deep waters of the mid-latitude (~40°S) South Pacific along a meridional transect between South America and New Zealand. The goal of our study is to gain better insight into the distribution and mixing of water masses in the South Pacific and to evaluate the validity of Nd isotopes as a water mass tracer in this remote region of the ocean. The results demonstrate that biogeochemical cycling (scavenging processes in the Eastern Equatorial Pacific) and release of LREEs from the sediment clearly influence the distribution of the dissolved REE concentrations at certain locations. Nevertheless, the Nd isotope signatures clearly trace water masses including AAIW (Antarctic Intermediate Water) (average epsilon-Nd = -8.2 ± 0.3), LCDW (Lower Circumpolar Deep Water) (average epsilon-Nd = -8.3 ± 0.3), NPDW (North Pacific Deep Water) (average epsilon-Nd = -5.9 ± 0.3), and the remnants of NADW (North Atlantic Deep Water) (average epsilon-Nd = -9.7 ± 0.3). Filtered water samples taken from the sediment-water interface under the deep western boundary current off New Zealand suggest that boundary exchange processes are limited at this location and highlight the spatial and temporal variability of this process. These data will serve as a basis for the paleoceanographic application of Nd isotopes in the South Pacific. Dataset Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic New Zealand Pacific ENVELOPE(179.569480,-79.916500,-36.334500,-46.244950) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Despite its enormous extent and importance for global climate, the South Pacific has been poorly investigated in comparison to other regions with respect to chemical oceanography. Here we present the first detailed analysis of dissolved radiogenic Nd isotopes (epsilon-Nd) and rare earth elements (REEs) in intermediate and deep waters of the mid-latitude (~40°S) South Pacific along a meridional transect between South America and New Zealand. The goal of our study is to gain better insight into the distribution and mixing of water masses in the South Pacific and to evaluate the validity of Nd isotopes as a water mass tracer in this remote region of the ocean. The results demonstrate that biogeochemical cycling (scavenging processes in the Eastern Equatorial Pacific) and release of LREEs from the sediment clearly influence the distribution of the dissolved REE concentrations at certain locations. Nevertheless, the Nd isotope signatures clearly trace water masses including AAIW (Antarctic Intermediate Water) (average epsilon-Nd = -8.2 ± 0.3), LCDW (Lower Circumpolar Deep Water) (average epsilon-Nd = -8.3 ± 0.3), NPDW (North Pacific Deep Water) (average epsilon-Nd = -5.9 ± 0.3), and the remnants of NADW (North Atlantic Deep Water) (average epsilon-Nd = -9.7 ± 0.3). Filtered water samples taken from the sediment-water interface under the deep western boundary current off New Zealand suggest that boundary exchange processes are limited at this location and highlight the spatial and temporal variability of this process. These data will serve as a basis for the paleoceanographic application of Nd isotopes in the South Pacific. |
format |
Dataset |
author |
Molina-Kescher, Mario Frank, Martin Hathorne, Ed C |
spellingShingle |
Molina-Kescher, Mario Frank, Martin Hathorne, Ed C South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
author_facet |
Molina-Kescher, Mario Frank, Martin Hathorne, Ed C |
author_sort |
Molina-Kescher, Mario |
title |
South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
title_short |
South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
title_full |
South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
title_fullStr |
South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
title_full_unstemmed |
South Pacific dissolved Nd isotope compositions, rare earth element and nutrient concentrations from SONNE cruise SO213 |
title_sort |
south pacific dissolved nd isotope compositions, rare earth element and nutrient concentrations from sonne cruise so213 |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.825657 https://doi.org/10.1594/PANGAEA.825657 |
op_coverage |
MEDIAN LATITUDE: -42.009952 * MEDIAN LONGITUDE: -127.209103 * SOUTH-BOUND LATITUDE: -46.244950 * WEST-BOUND LONGITUDE: 179.569480 * NORTH-BOUND LATITUDE: -36.334500 * EAST-BOUND LONGITUDE: -79.916500 * DATE/TIME START: 2010-12-31T18:26:00 * DATE/TIME END: 2011-03-01T00:22:00 |
long_lat |
ENVELOPE(179.569480,-79.916500,-36.334500,-46.244950) |
geographic |
Antarctic New Zealand Pacific |
geographic_facet |
Antarctic New Zealand Pacific |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Molina-Kescher, Mario; Frank, Martin; Hathorne, Ed C (2013): South Pacific dissolved Nd isotope compositions and rare earth element distributions: Water mass mixing versus biogeochemical cycling. Geochimica et Cosmochimica Acta, 127, 171-189, https://doi.org/10.1016/j.gca.2013.11.038 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.825657 https://doi.org/10.1594/PANGAEA.825657 |
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.825657 https://doi.org/10.1016/j.gca.2013.11.038 |
_version_ |
1766164585465774080 |