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  • 2015-2019  (10)
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  • 1
    Publication Date: 2021-02-08
    Description: The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the previous IDP2014. For the first time, the IDP2017 contains data for a large suite of biogeochemical parameters as well as aerosol and rain data characterising atmospheric trace element and isotope (TEI) sources. The TEI data in the IDP2017 are quality controlled by careful assessment of intercalibration results and multi-laboratory data comparisons at crossover stations. The IDP2017 consists of two parts: (1) a compilation of digital data for more than 450 TEIs as well as standard hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing an on-line atlas that includes more than 590 section plots and 130 animated 3D scenes. The digital data are provided in several formats, including ASCII, Excel spreadsheet, netCDF, and Ocean Data View collection. Users can download the full data packages or make their own custom selections with a new on-line data extraction service. In addition to the actual data values, the IDP2017 also contains data quality flags and 1-σ data error values where available. Quality flags and error values are useful for data filtering and for statistical analysis. Metadata about data originators, analytical methods and original publications related to the data are linked in an easily accessible way. The eGEOTRACES Electronic Atlas is the visual representation of the IDP2017 as section plots and rotating 3D scenes. The basin-wide 3D scenes combine data from many cruises and provide quick overviews of large-scale tracer distributions. These 3D scenes provide geographical and bathymetric context that is crucial for the interpretation and assessment of tracer plumes near ocean margins or along ridges. The IDP2017 is the result of a truly international effort involving 326 researchers from 22 countries. This publication provides the critical reference for unpublished data, as well as for studies that make use of a large cross-section of data from the IDP2017.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2021-03-19
    Description: The Rare Earth Elements (REEs) have been widely used to investigate marine biogeochemical processes as well as the sources and mixing of water masses. However, there are still important uncertainties about the global aqueous REE cycle with respect to the contributions of highly reactive basaltic minerals originating from volcanic islands and the role of Submarine Groundwater Discharge (SGD). Here we present dissolved REE concentrations obtained from waters at the island-ocean interface (including SGD, river, lagoon and coastal waters) from the island of Tahiti and from three detailed open ocean profiles on the Manihiki Plateau (including neodymium (Nd) isotope compositions), which are located in ocean currents downstream of Tahiti. Tahitian fresh waters have highly variable REE concentrations that likely result from variable water–rock interaction and removal by secondary minerals. In contrast to studies on other islands, the SGD samples do not exhibit elevated REE concentrations but have distinctive REE distributions and Y/Ho ratios. The basaltic Tahitian rocks impart a REE pattern to the waters characterized by a middle REE enrichment, with a peak at europium similar to groundwaters and coastal waters of other volcanic islands in the Pacific. However, the basaltic island REE characteristics (with the exception of elevated Y/Ho ratios) are lost during transport to the Manihiki Plateau within surface waters that also exhibit highly radiogenic Nd isotope signatures. Our new data demonstrate that REE concentrations are enriched in Tahitian coastal water, but without multidimensional sampling, basaltic island Nd flux estimates range over orders of magnitude from relatively small to globally significant. Antarctic Intermediate Water (AAIW) loses its characteristic Nd isotopic signature (-6 to-9) around the Manihiki Plateau as a consequence of mixing with South Equatorial Pacific Intermediate Water (SEqPIW), which shows more positive values (-1 to -2). However, an additional Nd input/exchange along the pathway of AAIW, eventually originating from the volcanic Society, Tuamotu and Tubuai Islands (including Tahiti), is indicated by an offset from the mixing array of AAIW and SEqPIW to more radiogenic Nd isotope compositions.
    Type: Article , PeerReviewed
    Format: text
    Format: image
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  • 3
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    Unknown
    PANGAEA
    In:  Supplement to: Behrens, Melanie K; Pahnke, Katharina; Paffrath, Ronja; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2018): Rare earth element distributions in the West Pacific: Trace element sources and conservative vs. non-conservative behavior. Earth and Planetary Science Letters, 486, 166-177, https://doi.org/10.1016/j.epsl.2018.01.016
    Publication Date: 2023-03-03
    Description: Recent studies suggest that transport and water mass mixing may play a dominant role in controlling the distribution of dissolved rare earth element concentrations ([REE]) at least in parts of the North and South Atlantic and the Pacific Southern Ocean. Here we report vertically and spatially high-resolution profiles of dissolved REE concentrations ([REE]) along a NW-SE transect in the West Pacific and examine the processes affecting the [REE] distributions in this area. Surface water REE patterns reveal sources of trace element (TE) input near South Korea and in the tropical equatorial West Pacific. Positive europium anomalies and middle REE enrichments in surface and subsurface waters are indicative of TE input from volcanic islands and fingerprint in detail small-scale equatorial zonal eastward transport of TEs to the iron-limited tropical East Pacific. The low [REE] of North and South Pacific Tropical Waters and Antarctic Intermediate Water are a long-range (i.e., preformed) laterally advected signal, whereas increasing [REE] with depth within North Pacific Intermediate Water result from release from particles. Optimum multiparameter analysis of deep to bottom waters indicates a dominant control of lateral transport and mixing on [REE] at the depth of Lower Circumpolar Deep Water (?3000 m water depth; ~75-100% explained by water mass mixing), allowing the northward tracing of LCDW to ~28°N in the Northwest Pacific. In contrast, scavenging in the hydrothermal plumes of the Lau Basin and Tonga-Fiji area at 1500-2000 m water depth leads to [REE] deficits (~40-60% removal) and marked REE fractionation in the tropical West Pacific. Overall, our data provide evidence for active trace element input both near South Korea and Papua New Guinea, and for a strong lateral transport component in the distribution of dissolved REEs in large parts of the West Pacific.
    Keywords: Center for Marine Environmental Sciences; Cerium, dissolved; Coefficient of variation; CTD/Rosette; CTD-RO; DEPTH, water; Dysprosium, dissolved; Elevation of event; Erbium, dissolved; Europium, dissolved; Europium anomaly; Event label; Gadolinium, dissolved; GeoB17001-1; GeoB17002-1; GeoB17003-1; GeoB17004-1; GeoB17005-1; GeoB17011-1; GeoB17014-1; GeoB17015-1; GeoB17016-1; GeoB17017-1; GeoB17018-1; GeoB17019-1; Holmium, dissolved; Lanthanum, dissolved; Latitude of event; Longitude of event; Lutetium, dissolved; MARUM; Neodymium, dissolved; Praseodymium, dissolved; Ratio; Samarium, dissolved; Sample ID; SO223T; Sonne; Terbium, dissolved; Thulium, dissolved; TransGeoBioOc; Yttrium, dissolved
    Type: Dataset
    Format: text/tab-separated-values, 5568 data points
    Location Call Number Limitation Availability
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  • 4
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Behrens, Melanie K; Pahnke, Katharina; Schnetger, Bernhard; Brumsack, Hans-Jürgen (2018): Sources and processes affecting the distribution of dissolved Nd isotopes and concentrations in the West Pacific. Geochimica et Cosmochimica Acta, 222, 508-534, https://doi.org/10.1016/j.gca.2017.11.008
    Publication Date: 2023-11-24
    Description: Hydrographic data and dissolved seawater Neodymium isotopes and concentrations from twelve stations along a transect in the West Pacific between South Korea and Fiji (R/V Sonne cruise SO223T).
    Keywords: Calculated; Center for Marine Environmental Sciences; CTD; CTD/Rosette; CTD-RO; Density, sigma-theta (0); DEPTH, water; Elevation of event; Event label; GeoB17001-1; GeoB17002-1; GeoB17003-1; GeoB17004-1; GeoB17005-1; GeoB17011-1; GeoB17014-1; GeoB17015-1; GeoB17016-1; GeoB17017-1; GeoB17018-1; GeoB17019-1; Latitude of event; Longitude of event; MARUM; Neodymium, dissolved; Neodymium, standard deviation; Neutral density; Oxygen; Oxygen, apparent utilization; Quality flag; Salinity; Sample code/label; SO223T; Sonne; Temperature, water, potential; TransGeoBioOc; ε-Neodymium; ε-Neodymium, error
    Type: Dataset
    Format: text/tab-separated-values, 2220 data points
    Location Call Number Limitation Availability
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  • 5
    Publication Date: 2024-02-16
    Keywords: Alkalinity, total; Category; Cerium, dissolved; Date/Time of event; DEPTH, water; Description; Dysprosium, dissolved; Erbium, dissolved; Europium, dissolved; Event label; Gadolinium, dissolved; HAND; Holmium, dissolved; Lanthanum, dissolved; Latitude of event; Longitude of event; Lutetium, dissolved; Neodymium, dissolved; Praseodymium, dissolved; Salinity; Samarium, dissolved; Sampling by hand; Silicate; Tahiti_t130; Tahiti_t139; Tahiti_t141; Tahiti_t142; Tahiti_t144; Tahiti_t145; Tahiti_t153; Tahiti_t154; Tahiti_t170; Tahiti_t171; Tahiti_t186; Tahiti_t187; Tahiti_t188; Tahiti_t189; Tahiti_t194; Tahiti_t195; Tahiti_t196; Tahiti_t197; Tahiti_t324; Tahiti_t350; Tahiti_t351; Tahiti_t352; Tahiti_t354; Tahiti_t355; Tahiti_t356; Tahiti_t357; Tahiti_t358; Terbium, dissolved; Thulium, dissolved; Ytterbium, dissolved; Yttrium, dissolved
    Type: Dataset
    Format: text/tab-separated-values, 521 data points
    Location Call Number Limitation Availability
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  • 6
    Publication Date: 2024-02-16
    Keywords: Cerium, dissolved; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Dysprosium, dissolved; Erbium, dissolved; Europium, dissolved; Event label; Gadolinium, dissolved; Holmium, dissolved; Lanthanum, dissolved; Latitude of event; Longitude of event; Lutetium, dissolved; MANIHIKI II; Neodymium, dissolved; Praseodymium, dissolved; Samarium, dissolved; SO225; SO225_21-1; SO225_2-2; SO225_53-4; Sonne; South Pacific Ocean; Terbium, dissolved; Thulium, dissolved; Ytterbium, dissolved; Yttrium, dissolved
    Type: Dataset
    Format: text/tab-separated-values, 540 data points
    Location Call Number Limitation Availability
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  • 7
    Publication Date: 2024-02-16
    Keywords: CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Event label; Latitude of event; Longitude of event; MANIHIKI II; Oxygen; Salinity; SO225; SO225_21-1; SO225_2-2; SO225_53-4; Sonne; South Pacific Ocean; Temperature, water, potential; ε-Neodymium; ε-Neodymium, error
    Type: Dataset
    Format: text/tab-separated-values, 216 data points
    Location Call Number Limitation Availability
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  • 8
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Molina-Kescher, Mario; Hathorne, Ed C; Osborne, Anne H; Behrens, Melanie K; Kölling, Martin; Pahnke, Katharina; Frank, Martin (2018): The Influence of Basaltic Islands on the Oceanic REE Distribution: A Case Study From the Tropical South Pacific. Frontiers in Marine Science, 5, https://doi.org/10.3389/fmars.2018.00050
    Publication Date: 2024-02-16
    Description: The Rare Earth Elements (REEs) have been widely used to investigate marine biogeochemical processes as well as the sources and mixing of water masses. However, there are still important uncertainties about the global aqueous REE cycle with respect to the contributions of highly reactive basaltic minerals originating from volcanic islands and the role of Submarine Groundwater Discharge (SGD). Here we present dissolved REE concentrations obtained from waters at the island-ocean interface (including SGD, river, lagoon and coastal waters) from the island of Tahiti and from three detailed open ocean profiles on the Manihiki Plateau (including neodymium (Nd) isotope compositions), which are located in ocean currents downstream of Tahiti. Tahitian fresh waters have highly variable REE concentrations that likely result from variable water-rock interaction and removal by secondary minerals. In contrast to studies on other islands, the SGD samples do not exhibit elevated REE concentrations but have distinctive REE distributions and Y/Ho ratios. The basaltic Tahitian rocks impart a REE pattern to the waters characterized by a middle REE enrichment, with a peak at europium similar to groundwaters and coastal waters of other volcanic islands in the Pacific. However, the basaltic island REE characteristics (with the exception of elevated Y/Ho ratios) are lost during transport to the Manihiki Plateau within surface waters that also exhibit highly radiogenic Nd isotope signatures. Our new data demonstrate that REE concentrations are enriched in Tahitian coastal water, but without multidimensional sampling, basaltic island Nd flux estimates range over orders of magnitude from relatively small to globally significant. Antarctic Intermediate Water (AAIW) loses its characteristic Nd isotopic signature (-6 to-9) around the Manihiki Plateau as a consequence of mixing with South Equatorial Pacific Intermediate Water (SEqPIW), which shows more positive values (-1 to -2). However, an additional Nd input/exchange along the pathway of AAIW, eventually originating from the volcanic Society, Tuamotu and Tubuai Islands (including Tahiti), is indicated by an offset from the mixing array of AAIW and SEqPIW to more radiogenic Nd isotope compositions.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2018-08-13
    Description: The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the previous IDP2014. For the first time, the IDP2017 contains data for a large suite of biogeochemical parameters as well as aerosol and rain data characterising atmospheric trace element and isotope (TEI) sources. The TEI data in the IDP2017 are quality controlled by careful assessment of intercalibration results and multi-laboratory data comparisons at crossover stations. The IDP2017 consists of two parts: (1) a compilation of digital data for more than 450 TEIs as well as standard hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing an on-line atlas that includes more than 590 section plots and 130 animated 3D scenes. The digital data are provided in several formats, including ASCII, Excel spreadsheet, netCDF, and Ocean Data View collection. Users can download the full data packages or make their own custom selections with a new on-line data extraction service. In addition to the actual data values, the IDP2017 also contains data quality flags and 1-σ data error values where available. Quality flags and error values are useful for data filtering and for statistical analysis. Metadata about data originators, analytical methods and original publications related to the data are linked in an easily accessible way. The eGEOTRACES Electronic Atlas is the visual representation of the IDP2017 as section plots and rotating 3D scenes. The basin-wide 3D scenes combine data from many cruises and provide quick overviews of large-scale tracer distributions. These 3D scenes provide geographical and bathymetric context that is crucial for the interpretation and assessment of tracer plumes near ocean margins or along ridges. The IDP2017 is the result of a truly international effort involving 326 researchers from 25 countries. This publication provides the critical reference for unpublished data, as well as for studies that make use of a large cross-section of data from the IDP2017. This article is part of a special issue entitled: Conway GEOTRACES - edited by Tim M. Conway, Tristan Horner, Yves Plancherel, and Aridane G. González.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 10
    Publication Date: 2022-05-25
    Description: © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Chemical Geology 493 (2018): 210-223, doi:10.1016/j.chemgeo.2018.05.040.
    Description: The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the previous IDP2014. For the first time, the IDP2017 contains data for a large suite of biogeochemical parameters as well as aerosol and rain data characterising atmospheric trace element and isotope (TEI) sources. The TEI data in the IDP2017 are quality controlled by careful assessment of intercalibration results and multi-laboratory data comparisons at crossover stations. The IDP2017 consists of two parts: (1) a compilation of digital data for more than 450 TEIs as well as standard hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing an on-line atlas that includes more than 590 section plots and 130 animated 3D scenes. The digital data are provided in several formats, including ASCII, Excel spreadsheet, netCDF, and Ocean Data View collection. Users can download the full data packages or make their own custom selections with a new on-line data extraction service. In addition to the actual data values, the IDP2017 also contains data quality flags and 1-σ data error values where available. Quality flags and error values are useful for data filtering and for statistical analysis. Metadata about data originators, analytical methods and original publications related to the data are linked in an easily accessible way. The eGEOTRACES Electronic Atlas is the visual representation of the IDP2017 as section plots and rotating 3D scenes. The basin-wide 3D scenes combine data from many cruises and provide quick overviews of large-scale tracer distributions. These 3D scenes provide geographical and bathymetric context that is crucial for the interpretation and assessment of tracer plumes near ocean margins or along ridges. The IDP2017 is the result of a truly international effort involving 326 researchers from 25 countries. This publication provides the critical reference for unpublished data, as well as for studies that make use of a large cross-section of data from the IDP2017. This article is part of a special issue entitled: Conway GEOTRACES - edited by Tim M. Conway, Tristan Horner, Yves Plancherel, and Aridane G. González.
    Description: We gratefully acknowledge financial support by the Scientific Committee on Oceanic Research (SCOR) through grants from the U.S. National Science Foundation, including grants OCE-0608600, OCE-0938349, OCE-1243377, and OCE-1546580. Financial support was also provided by the UK Natural Environment Research Council (NERC), the Ministry of Earth Science of India, the Centre National de Recherche Scientifique, l'Université Paul Sabatier de Toulouse, the Observatoire Midi-Pyrénées Toulouse, the Universitat Autònoma de Barcelona, the Kiel Excellence Cluster The Future Ocean, the Swedish Museum of Natural History, The University of Tokyo, The University of British Columbia, The Royal Netherlands Institute for Sea Research, the GEOMAR-Helmholtz Centre for Ocean Research Kiel, and the Alfred Wegener Institute.
    Keywords: GEOTRACES ; Trace elements ; Isotopes ; Electronic atlas ; IDP2017
    Repository Name: Woods Hole Open Access Server
    Type: Article
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