Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207
The radiogenic isotope composition of the Rare Earth Element (REE) neodymium (Nd) is a powerful water mass proxy for present and past ocean circulation. The processes controlling the Nd budget of the global ocean are not quantitatively understood and in particular source and sink mechanisms are stil...
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Online Access: | https://dx.doi.org/10.1594/pangaea.806270 https://doi.pangaea.de/10.1594/PANGAEA.806270 |
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ftdatacite:10.1594/pangaea.806270 2023-05-15T18:26:00+02:00 Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 Grasse, Patricia Stichel, Torben Stumpf, Roland Stramma, Lothar Frank, Martin 2013 application/zip https://dx.doi.org/10.1594/pangaea.806270 https://doi.pangaea.de/10.1594/PANGAEA.806270 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.epsl.2012.07.044 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 Supplementary Collection of Datasets Collection article 2013 ftdatacite https://doi.org/10.1594/pangaea.806270 https://doi.org/10.1016/j.epsl.2012.07.044 2022-02-08T16:24:46Z The radiogenic isotope composition of the Rare Earth Element (REE) neodymium (Nd) is a powerful water mass proxy for present and past ocean circulation. The processes controlling the Nd budget of the global ocean are not quantitatively understood and in particular source and sink mechanisms are still under debate.In this study we present the first full water column data set of dissolved Nd isotope compositions and Nd concentrations for the Eastern Equatorial Pacific (EEP), where one of the globally largest Oxygen Minimum Zones (OMZ) is located. This region is of particular interest for understanding the biogeochemical cycling of REEs because anoxic conditions may lead to release of REEs from the shelf, whereas high particle densities and fluxes potentially remove the REEs from the water column. Data were obtained between 11400N and 161S along a nearshore and an offshore transect. Near surface zonal current bands, such as the Equatorial Undercurrent (EUC) and the Subsurface Countercurrent (SSCC), which are supplying oxygen-rich water to the OMZ are characterized by radiogenic Nd isotope signatures (eNd=-2). Surface waters in the northernmost part of the study area are even more radiogenic (eNd = +3), most likely due to release of Nd from volcanogenic material. Deep and bottom waters at the southernmost offshore station (141S) are clearly controlled by advection of water masses with less radiogenic signatures (eNd=- 7) originating from the Southern Ocean. Towards the equator, however, the deep waters show a clear trend towards more radiogenic values of up to eNd=-2. The northernmost station located in the Panama basin shows highly radiogenic Nd isotope signatures in the entire water column, which indicates that particle scavenging, downward transport and release processes play an important role. This is supported by relatively low Nd concentrations in deep waters (3000-6000 m) in the EEP (20 pmol/kg) compared to locations in the Northern and Central Pacific (40-60 pmol/kg), which suggests enhanced removal of Nd in the EEP. Article in Journal/Newspaper Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Pacific Roland ENVELOPE(-64.050,-64.050,-65.067,-65.067) Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 |
spellingShingle |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 Grasse, Patricia Stichel, Torben Stumpf, Roland Stramma, Lothar Frank, Martin Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
topic_facet |
Climate - Biogeochemistry Interactions in the Tropical Ocean SFB754 |
description |
The radiogenic isotope composition of the Rare Earth Element (REE) neodymium (Nd) is a powerful water mass proxy for present and past ocean circulation. The processes controlling the Nd budget of the global ocean are not quantitatively understood and in particular source and sink mechanisms are still under debate.In this study we present the first full water column data set of dissolved Nd isotope compositions and Nd concentrations for the Eastern Equatorial Pacific (EEP), where one of the globally largest Oxygen Minimum Zones (OMZ) is located. This region is of particular interest for understanding the biogeochemical cycling of REEs because anoxic conditions may lead to release of REEs from the shelf, whereas high particle densities and fluxes potentially remove the REEs from the water column. Data were obtained between 11400N and 161S along a nearshore and an offshore transect. Near surface zonal current bands, such as the Equatorial Undercurrent (EUC) and the Subsurface Countercurrent (SSCC), which are supplying oxygen-rich water to the OMZ are characterized by radiogenic Nd isotope signatures (eNd=-2). Surface waters in the northernmost part of the study area are even more radiogenic (eNd = +3), most likely due to release of Nd from volcanogenic material. Deep and bottom waters at the southernmost offshore station (141S) are clearly controlled by advection of water masses with less radiogenic signatures (eNd=- 7) originating from the Southern Ocean. Towards the equator, however, the deep waters show a clear trend towards more radiogenic values of up to eNd=-2. The northernmost station located in the Panama basin shows highly radiogenic Nd isotope signatures in the entire water column, which indicates that particle scavenging, downward transport and release processes play an important role. This is supported by relatively low Nd concentrations in deep waters (3000-6000 m) in the EEP (20 pmol/kg) compared to locations in the Northern and Central Pacific (40-60 pmol/kg), which suggests enhanced removal of Nd in the EEP. |
format |
Article in Journal/Newspaper |
author |
Grasse, Patricia Stichel, Torben Stumpf, Roland Stramma, Lothar Frank, Martin |
author_facet |
Grasse, Patricia Stichel, Torben Stumpf, Roland Stramma, Lothar Frank, Martin |
author_sort |
Grasse, Patricia |
title |
Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
title_short |
Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
title_full |
Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
title_fullStr |
Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
title_full_unstemmed |
Distribution of neodymium isotopes and concentrations during M77/3 and M77/4, supplement to: Grasse, Patricia; Stichel, Torben; Stumpf, Roland; Stramma, Lothar; Frank, Martin (2012): The distribution of neodymium isotopes and concentrations in the Eastern Equatorial Pacific Water mass advection versus particle exchange. Earth and Planetary Science Letters, 198-207 |
title_sort |
distribution of neodymium isotopes and concentrations during m77/3 and m77/4, supplement to: grasse, patricia; stichel, torben; stumpf, roland; stramma, lothar; frank, martin (2012): the distribution of neodymium isotopes and concentrations in the eastern equatorial pacific water mass advection versus particle exchange. earth and planetary science letters, 198-207 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2013 |
url |
https://dx.doi.org/10.1594/pangaea.806270 https://doi.pangaea.de/10.1594/PANGAEA.806270 |
long_lat |
ENVELOPE(-64.050,-64.050,-65.067,-65.067) |
geographic |
Pacific Roland Southern Ocean |
geographic_facet |
Pacific Roland Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.epsl.2012.07.044 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.806270 https://doi.org/10.1016/j.epsl.2012.07.044 |
_version_ |
1766207765892562944 |