Radionuclides measured in surface water samples from the South Atlantic
In the nutrient-rich Southern Ocean, Fe is a vital constituent controlling the growth of phytoplankton. Despite much effort, the origin and transport of Fe to the oceans are not well understood. In this study we address the issue with geochemical data and Nd isotopic compositions of suspended partic...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.60056 2023-05-15T14:04:42+02:00 Radionuclides measured in surface water samples from the South Atlantic Hegner, Ernst Dauelsberg, Hans-Jürgen Rutgers van der Loeff, Michiel M Jeandel, Catherine de Baar, Hein J W MEDIAN LATITUDE: -57.394414 * MEDIAN LONGITUDE: -10.899730 * SOUTH-BOUND LATITUDE: -75.280000 * WEST-BOUND LONGITUDE: -69.380000 * NORTH-BOUND LATITUDE: -39.530000 * EAST-BOUND LONGITUDE: 20.020000 * DATE/TIME START: 1997-11-14T00:00:00 * DATE/TIME END: 1999-05-08T00:00:00 * MINIMUM DEPTH, water: 10 m * MAXIMUM DEPTH, water: 10 m 2007-01-31 text/tab-separated-values, 1565 data points https://doi.pangaea.de/10.1594/PANGAEA.60056 https://doi.org/10.1594/PANGAEA.60056 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.60056 https://doi.org/10.1594/PANGAEA.60056 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hegner, Ernst; Dauelsberg, Hans-Jürgen; Rutgers van der Loeff, Michiel M; Jeandel, Catherine; de Baar, Hein J W (2007): Nd isotopes constrain the origin of suspended particles in the Atlantic sector of the Southern Ocean. Geochemistry, Geophysics, Geosystems, 8, Q10008, https://doi.org/10.1029/2007GC001666 Aluminium particulate ANT-XV/2 AWI_MarGeoChem AWI_Paleo CT DATE/TIME Dauelsberg-track DEPTH water Error absolute relative Lanthanum LATITUDE LONGITUDE Marine Geochemistry @ AWI Neodymium Paleoenvironmental Reconstructions from Marine Sediments @ AWI Particle concentration Polarstern Profile/sampling length PS47 Sample code/label Thorium partiulate Underway cruise track measurements Ytterbium ε-Neodymium Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.60056 https://doi.org/10.1029/2007GC001666 2023-01-20T07:36:34Z In the nutrient-rich Southern Ocean, Fe is a vital constituent controlling the growth of phytoplankton. Despite much effort, the origin and transport of Fe to the oceans are not well understood. In this study we address the issue with geochemical data and Nd isotopic compositions of suspended particle samples collected from 1997 to 1999 in the South Atlantic Sector of the Southern Ocean. Al, Th, and rare earth element (REE) concentrations as well as 143Nd/144Nd isotopic ratios in acetic acid-leached particle samples representing the lithogenic fraction delineate three major sources: (1) Patagonia and the Antarctic Peninsula provide material with eNd > -4 that is transported toward the east with the polar and subpolar front jets, (2) the south African shelf, although its influence is limited by the circumpolar circulation and wind direction, can account for material with eNd of -12 to -14 adjacent to South Africa, and (3) East Antarctica provides material with eNd of -10 to -15 to the eastern Weddell Sea and adjacent Antarctic Circumpolar Current. For this region we interpret the Nd isotopic evidence in combination with oceanographic/atmospheric constraints as evidence for supply of significant amounts of terrigenous detritus by icebergs. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Iceberg* Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Peninsula East Antarctica Patagonia Southern Ocean The Antarctic Weddell Weddell Sea ENVELOPE(-69.380000,20.020000,-39.530000,-75.280000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Aluminium particulate ANT-XV/2 AWI_MarGeoChem AWI_Paleo CT DATE/TIME Dauelsberg-track DEPTH water Error absolute relative Lanthanum LATITUDE LONGITUDE Marine Geochemistry @ AWI Neodymium Paleoenvironmental Reconstructions from Marine Sediments @ AWI Particle concentration Polarstern Profile/sampling length PS47 Sample code/label Thorium partiulate Underway cruise track measurements Ytterbium ε-Neodymium |
spellingShingle |
Aluminium particulate ANT-XV/2 AWI_MarGeoChem AWI_Paleo CT DATE/TIME Dauelsberg-track DEPTH water Error absolute relative Lanthanum LATITUDE LONGITUDE Marine Geochemistry @ AWI Neodymium Paleoenvironmental Reconstructions from Marine Sediments @ AWI Particle concentration Polarstern Profile/sampling length PS47 Sample code/label Thorium partiulate Underway cruise track measurements Ytterbium ε-Neodymium Hegner, Ernst Dauelsberg, Hans-Jürgen Rutgers van der Loeff, Michiel M Jeandel, Catherine de Baar, Hein J W Radionuclides measured in surface water samples from the South Atlantic |
topic_facet |
Aluminium particulate ANT-XV/2 AWI_MarGeoChem AWI_Paleo CT DATE/TIME Dauelsberg-track DEPTH water Error absolute relative Lanthanum LATITUDE LONGITUDE Marine Geochemistry @ AWI Neodymium Paleoenvironmental Reconstructions from Marine Sediments @ AWI Particle concentration Polarstern Profile/sampling length PS47 Sample code/label Thorium partiulate Underway cruise track measurements Ytterbium ε-Neodymium |
description |
In the nutrient-rich Southern Ocean, Fe is a vital constituent controlling the growth of phytoplankton. Despite much effort, the origin and transport of Fe to the oceans are not well understood. In this study we address the issue with geochemical data and Nd isotopic compositions of suspended particle samples collected from 1997 to 1999 in the South Atlantic Sector of the Southern Ocean. Al, Th, and rare earth element (REE) concentrations as well as 143Nd/144Nd isotopic ratios in acetic acid-leached particle samples representing the lithogenic fraction delineate three major sources: (1) Patagonia and the Antarctic Peninsula provide material with eNd > -4 that is transported toward the east with the polar and subpolar front jets, (2) the south African shelf, although its influence is limited by the circumpolar circulation and wind direction, can account for material with eNd of -12 to -14 adjacent to South Africa, and (3) East Antarctica provides material with eNd of -10 to -15 to the eastern Weddell Sea and adjacent Antarctic Circumpolar Current. For this region we interpret the Nd isotopic evidence in combination with oceanographic/atmospheric constraints as evidence for supply of significant amounts of terrigenous detritus by icebergs. |
format |
Dataset |
author |
Hegner, Ernst Dauelsberg, Hans-Jürgen Rutgers van der Loeff, Michiel M Jeandel, Catherine de Baar, Hein J W |
author_facet |
Hegner, Ernst Dauelsberg, Hans-Jürgen Rutgers van der Loeff, Michiel M Jeandel, Catherine de Baar, Hein J W |
author_sort |
Hegner, Ernst |
title |
Radionuclides measured in surface water samples from the South Atlantic |
title_short |
Radionuclides measured in surface water samples from the South Atlantic |
title_full |
Radionuclides measured in surface water samples from the South Atlantic |
title_fullStr |
Radionuclides measured in surface water samples from the South Atlantic |
title_full_unstemmed |
Radionuclides measured in surface water samples from the South Atlantic |
title_sort |
radionuclides measured in surface water samples from the south atlantic |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.60056 https://doi.org/10.1594/PANGAEA.60056 |
op_coverage |
MEDIAN LATITUDE: -57.394414 * MEDIAN LONGITUDE: -10.899730 * SOUTH-BOUND LATITUDE: -75.280000 * WEST-BOUND LONGITUDE: -69.380000 * NORTH-BOUND LATITUDE: -39.530000 * EAST-BOUND LONGITUDE: 20.020000 * DATE/TIME START: 1997-11-14T00:00:00 * DATE/TIME END: 1999-05-08T00:00:00 * MINIMUM DEPTH, water: 10 m * MAXIMUM DEPTH, water: 10 m |
long_lat |
ENVELOPE(-69.380000,20.020000,-39.530000,-75.280000) |
geographic |
Antarctic Antarctic Peninsula East Antarctica Patagonia Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Patagonia Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Iceberg* Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Iceberg* Southern Ocean Weddell Sea |
op_source |
Supplement to: Hegner, Ernst; Dauelsberg, Hans-Jürgen; Rutgers van der Loeff, Michiel M; Jeandel, Catherine; de Baar, Hein J W (2007): Nd isotopes constrain the origin of suspended particles in the Atlantic sector of the Southern Ocean. Geochemistry, Geophysics, Geosystems, 8, Q10008, https://doi.org/10.1029/2007GC001666 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.60056 https://doi.org/10.1594/PANGAEA.60056 |
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.60056 https://doi.org/10.1029/2007GC001666 |
_version_ |
1766275951755264000 |