GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Online-Ressource
    Online-Ressource
    Lead : Its Effects on Environment and Health. (2017)
    Berlin/Boston :Walter de Gruyter GmbH,
    Details
    Schlagwort(e): Lead--Environmental aspects. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: Metal Ions in Life Sciences links coordination chemistry and biochemistry in their widest sense and thus increases our understanding of the relationship between the chemistry of metals and life processes; in fact, it is an old wisdom that metals are indispensable for life. The series reflects the interdisciplinary nature of Biological Inorganic Chemistry and coordinates the efforts of scientists in numerous interconnecting research fields.
    Materialart: Online-Ressource
    Seiten: 1 online resource (596 pages)
    Ausgabe: 1st ed.
    ISBN: 9783110434330
    Serie: Metal Ions in Life Sciences Series ; v.17
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=4843197
    Sprache: Englisch
    Anmerkung: Intro -- About the Editors -- Historical Development and Perspectives of the Series -- Preface to Volume 17 -- Contents -- Contributors to Volume 17 -- Titles of Volume 1-44 in the Metal Ions in Biological Systems Series -- Contents of Volumes in the Metal Ions in Life Sciences Series -- 1. The Bioinorganic Chemistry of Lead in the Context of Its Toxicity -- Abstract -- 1. Introduction -- 2. Lead Chemistry with Regard to Biochemistry -- 3. History and Manufacturing of Lead-Containing Materials -- 4. Safe Levels of Exposures? -- 5. Regulatory Levels for Lead in Water, Food, and Air -- 6. Transport in Blood and Cellular Uptake -- 7. Lead Toxicity -- 8. Cellular and Molecular Actions -- 9. General Conclusions -- Acknowledgment -- Abbreviations -- References -- 2. Biogeochemistry of Lead. Its Release to the Environment and Chemical Speciation -- Abstract -- 1. Introduction -- 2. Geochemistry of Lead -- 3. Mobilization of Lead -- 4. Lead in the Atmosphere -- 5. Lead in the Terrestrial and Freshwater Environment -- 6. Lead in Ocean Waters -- 7. Summary and Conclusions -- Acknowledgement -- Abbreviations and Definitions -- References -- 3. Analytical Methods for the Determination of Lead in the Environment -- Abstract -- 1. Introduction -- 2. Sampling -- 3. Spectrophotometry -- 4. X-ray Fluorescence -- 5. Electrochemical Methods -- 6. Atomic Spectroscopy -- 7. Speciation -- Abbreviations -- References -- 4. Smart Capsules for Lead Removal from Industrial Wastewater -- Abstract -- 1. Lead Ion Separation from Wastewater -- 2. Encapsualtion Technology -- 3. Alginate-Based Capsules -- 4. Carbon Nanotubes Core-in-Hematite Capsules -- 5. Polymer Swelling Capsules -- 6. General Conclusions -- Acknowledgments -- Abbreviations and Definitions -- References -- 5. Lead Speciation in Microorganisms -- Abstract -- 1. Introduction. , 2. Intracellular Metal Speciation Techniques -- 3. Intracellular Metal Localization Techniques -- 4. Lead Speciation in Microorganisms -- 5. Remaining Questions and Future Directions -- Acknowledgment -- Abbreviations -- References -- 6. Human Biomonitoring of Lead Exposure -- Abstract -- 1. Introduction -- 2. Pharmacokinetics -- 3. Biomarkers of Exposure -- 4. Biomarkers of Effect -- 5. Conclusions -- Abbreviations and Definitions -- References -- 7. Solid State Structures of Lead Complexes with Relevance for Biological Systems -- Abstract -- 1. Introduction -- 2. Amino Acid, Small-Peptide, and Protein Complexes -- 3. Nucleic Acid Constituent Complexes -- 4. Simple-Carbohydrate Complexes -- 5. Complexes of Other Biorelevant Ligands -- 6. Concluding Remarks -- Abbreviations -- References -- 8. Lead(II) Complexes of Amino Acids, Peptides, and Other Related Ligands of Biological Interest -- Abstract -- 1. Introduction -- 2. Complexation of Lead(II) -- 3. Lead(II) Complexes of Amino Acids and Derivatives -- 4. Lead(II) Complexes of Hydroxamic Acids, Related Small Ligands, and Hydroxamic Acid Derivatives of Amino Acids -- 5. Complexes of Lead(II) with Small Peptides and Related Ligands -- 6. Complexes of Lead(II) with Thiol-Rich Natural Peptides -- 7. Factors Determining Lead Selectivity against Zinc, Calcium or Cadmium -- Acknowledgments -- Abbreviations and Definitions -- References -- 9. Lead(II) Binding in Metallothioneins -- Abstract -- 1. Introduction -- 2. Metallothioneins and Toxic Metals -- 3. Metallothioneins and Lead -- 4. Conclusions -- Acknowledgments -- Abbreviations -- References -- 10. Lead(II) Binding in Natural and Artificial Proteins -- Abstract -- 1. Introduction -- 2. Lead in Natural Systems -- 3. Lead Chemistry with Designed Proteins -- 4. General Conclusions -- Acknowledgment -- Abbreviations and Definitions -- References. , 11. Complex Formation of Lead(II) with Nucleotides and Their Constituents -- Abstract -- 1. Introduction -- 2. Comparisons of the Properties of Lead(II) with Those of Related Divalent Metal Ions -- 3. Lead(II) Interactions with Hydroxyl Groups and Sugar Residues -- 4. Interactions of Lead(II) with Nucleobase Residues -- 5. Complexes of Lead(II) with Phosphates -- 6. Lead(II) Complexes of Nucleotides -- 7. Lead(II) Binding in Dinucleotides -- 8. Concluding Remarks -- Acknowledgment -- Abbreviations and Definitions -- References -- 12. The Role of Lead(II) in Nucleic Acids -- Abstract -- 1. Introduction -- 2. Relevant Properties of Lead(II) in Comparison to Other Divalent Metal Ions -- 3. Structures of Lead(II) Binding Sites in Nucleic Acids -- 4. Lead(II) as Hydrolytic Cleavage Agent to Probe Divalent Metal Ion Binding Sites and Single-Stranded RNA Regions -- 5. Lead(II) as Catalytic and Structural Metal Ion -- 6. Concluding Remarks and Future Directions -- Acknowledgments -- Abbreviations and Definitions -- References -- 13. Historical View on Lead: Guidelines and Regulations -- Abstract -- 1. Introduction -- 2. Historical Views on Lead Toxicity -- 3. Development of Guidelines and Regulations in the U. S -- 4. Development of Guidelines and Regulations Around the World -- 5. Conclusion -- Abbreviations -- References -- 14. Environmental Impact of Alkyl Lead(IV) Derivatives: Perspective after Their Phase-out -- Abstract -- 1. Introduction -- 2. The Past -- 3. Current Uses -- 4. Chemistry -- 5. After the Phase-Out -- 6. Lessons and Perspectives -- Abbreviations -- References -- 15. Lead Toxicity in Plants -- Abstract -- 1. Introduction: Environmental Relevance of Lead Toxicity in Plants -- 2. Critical Review of Proposed Mechanisms of Lead Toxicity in Plants -- 3. Conclusions and Outlook -- Acknowledgments -- Abbreviations -- References. , 16. Toxicology of Lead and Its Damage to Mammalian Organs -- Abstract -- 1. Introduction -- 2. Neurotoxicity of Lead -- 3. Immuno- and Hematotoxicity of Lead -- 4. Nephrotoxicity of Lead -- 5. Reproductive Toxicity of Lead -- 6. Osteotoxicity of Lead -- 7. Epidemiological Studies and Variables Associated with Low Blood Lead Levels -- 8. Concluding Remarks -- Acknowledgments -- Abbreviations -- References -- Subject Index.
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    GEOMAR EBL
  • 2
    facet.materialart.
    Unbekannt
    Arctic – Atlantic Exchange of the Dissolved Micronutrients Iron, Manganese, Cobalt, Nickel, Copper and Zinc With a Focus on Fram Strait (2022)
    Details
    Publikationsdatum: 2022-10-04
    Beschreibung: The Arctic Ocean is considered a source of micronutrients to the Nordic Seas and the North Atlantic Ocean through the gateway of Fram Strait (FS). However, there is a paucity of trace element data from across the Arctic Ocean gateways, and so it remains unclear how Arctic and North Atlantic exchange shapes micronutrient availability in the two ocean basins. In 2015 and 2016, GEOTRACES cruises sampled the Barents Sea Opening (GN04, 2015) and FS (GN05, 2016) for dissolved iron (dFe), manganese (dMn), cobalt (dCo), nickel (dNi), copper (dCu) and zinc (dZn). Together with the most recent synopsis of Arctic‐Atlantic volume fluxes, the observed trace element distributions suggest that FS is the most important gateway for Arctic‐Atlantic dissolved micronutrient exchange as a consequence of Intermediate and Deep Water transport. Combining fluxes from FS and the Barents Sea Opening with estimates for Davis Strait (GN02, 2015) suggests an annual net southward flux of 2.7 ± 2.4 Gg·a−1 dFe, 0.3 ± 0.3 Gg·a−1 dCo, 15.0 ± 12.5 Gg·a−1 dNi and 14.2 ± 6.9 Gg·a−1 dCu from the Arctic toward the North Atlantic Ocean. Arctic‐Atlantic exchange of dMn and dZn were more balanced, with a net southbound flux of 2.8 ± 4.7 Gg·a−1 dMn and a net northbound flux of 3.0 ± 7.3 Gg·a−1 dZn. Our results suggest that ongoing changes to shelf inputs and sea ice dynamics in the Arctic, especially in Siberian shelf regions, affect micronutrient availability in FS and the high latitude North Atlantic Ocean.
    Beschreibung: Plain Language Summary: Recent studies have proposed that the Arctic Ocean is a source of micronutrients such as dissolved iron (dFe), manganese (dMn), cobalt (dCo), nickel (dNi), copper (dCu) and zinc (dZn) to the North Atlantic Ocean. However, data at the Arctic Ocean gateways including Fram Strait and the Barents Sea Opening have been missing to date and so the extent of Arctic micronutrient transport toward the Atlantic Ocean remains unquantified. Here, we show that Fram Strait is the most important gateway for Arctic‐Atlantic micronutrient exchange which is a result of deep water transport at depths 〉500 m. Combined with a flux estimate for Davis Strait, this study suggests that the Arctic Ocean is a net source of dFe, dNi and dCu, and possibly also dCo, toward the North Atlantic Ocean. Arctic‐Atlantic dMn and dZn exchange seems more balanced. Properties in the East Greenland Current showed substantial similarities to observations in the upstream Central Arctic Ocean, indicating that Fram Strait may export micronutrients from Siberian riverine discharge and shelf sediments 〉3,000 km away. Increasing Arctic river discharge, permafrost thaw and coastal erosion, all consequences of ongoing climate change, may therefore alter future Arctic Ocean micronutrient transport to the North Atlantic Ocean.
    Beschreibung: Key Points: Fram Strait is the major gateway for Arctic‐Atlantic exchange of the dissolved micronutrients Fe, Mn, Co, Ni, Cu and Zn. The Arctic is a net source of dissolved Fe, Co, Ni and Cu to the Nordic Seas and toward the North Atlantic; Mn and Zn exchange are balanced. Waters of the Central Arctic Ocean, including the Transpolar Drift, are the main drivers of gross Arctic micronutrient export.
    Beschreibung: German Research Foundation
    Beschreibung: Netherlands Organization for Scientific Research
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.859558
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.871030
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.868396
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.905347
    Beschreibung: https://dataportal.nioz.nl/doi/10.25850/nioz/7b.b.jc
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.933431
    Beschreibung: https://www.bco-dmo.org/dataset/718440
    Beschreibung: https://doi.org/10.1594/PANGAEA.936029
    Beschreibung: https://doi.org/10.1594/PANGAEA.936027
    Beschreibung: https://doi.pangaea.de/10.1594/PANGAEA.927429
    Schlagwort(e): ddc:551.9
    Sprache: Englisch
    Materialart: doc-type:article
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    CITATION GEO-LEO
  • 3
    Digitale Medien
    Digitale Medien
    Modulation of cadmium uptake in phytoplankton by seawater CO 2 concentration (1999)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 402 (1999), S. 165-167 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The vertical distribution of cadmium in the ocean is characteristic of an algal nutrient, although an underlying physiological basis remains undiscovered. The strong correlation between dissolved cadmium and phosphorus concentrations in sea water has nevertheless been exploited for ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/46007
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    facet.materialart.
    Unbekannt
    The GEOTRACES Intermediate Data Product 2017 (2018)
    In:  EPIC3Chemical Geology, 493, pp. 210-223, ISSN: 00092541
    Details
    Publikationsdatum: 2018-08-13
    Beschreibung: 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
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 5
    facet.materialart.
    Unbekannt
    A call for refining the role of humic-like substances in the oceanic iron cycle (2020)
    In:  EPIC3Scientific Reports, 10(1), ISSN: 2045-2322
    Details
    Publikationsdatum: 2020-07-24
    Beschreibung: Primary production by phytoplankton represents a major pathway whereby atmospheric CO2 is sequestered in the ocean, but this requires iron, which is in scarce supply. As over 99% of iron is complexed to organic ligands, which increase iron solubility and microbial availability, understanding the processes governing ligand dynamics is of fundamental importance. Ligands within humic-like substances have long been considered important for iron complexation, but their role has never been explained in an oceanographically consistent manner. Here we show iron co-varying with electroactive humic substances at multiple open ocean sites, with the ratio of iron to humics increasing with depth. Our results agree with humic ligands composing a large fraction of the iron-binding ligand pool throughout the water column. We demonstrate how maximum dissolved iron concentrations could be limited by the concentration and binding capacity of humic ligands, and provide a summary of the key processes that could influence these parameters. If this relationship is globally representative, humics could impose a concentration threshold that buffers the deep ocean iron inventory. This study highlights the dearth of humic data, and the immediate need to measure electroactive humics, dissolved iron and iron-binding ligands simultaneously from surface to depth, across different ocean basins.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 6
    facet.materialart.
    Unbekannt
    Elevated sources of cobalt in the Arctic Ocean (2020)
    European Geosciences Union
    Details
    Publikationsdatum: 2022-05-25
    Beschreibung: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Bundy, R. M., Tagliabue, A., Hawco, N. J., Morton, P. L., Twining, B. S., Hatta, M., Noble, A. E., Cape, M. R., John, S. G., Cullen, J. T., & Saito, M. A. Elevated sources of cobalt in the Arctic Ocean. Biogeosciences, 17(19), (2020): 4745-4767, doi:10.5194/bg-17-4745-2020.
    Beschreibung: Cobalt (Co) is an important bioactive trace metal that is the metal cofactor in cobalamin (vitamin B12) which can limit or co-limit phytoplankton growth in many regions of the ocean. Total dissolved and labile Co measurements in the Canadian sector of the Arctic Ocean during the U.S. GEOTRACES Arctic expedition (GN01) and the Canadian International Polar Year GEOTRACES expedition (GIPY14) revealed a dynamic biogeochemical cycle for Co in this basin. The major sources of Co in the Arctic were from shelf regions and rivers, with only minimal contributions from other freshwater sources (sea ice, snow) and eolian deposition. The most striking feature was the extremely high concentrations of dissolved Co in the upper 100 m, with concentrations routinely exceeding 800 pmol L−1 over the shelf regions. This plume of high Co persisted throughout the Arctic basin and extended to the North Pole, where sources of Co shifted from primarily shelf-derived to riverine, as freshwater from Arctic rivers was entrained in the Transpolar Drift. Dissolved Co was also strongly organically complexed in the Arctic, ranging from 70 % to 100 % complexed in the surface and deep ocean, respectively. Deep-water concentrations of dissolved Co were remarkably consistent throughout the basin (∼55 pmol L−1), with concentrations reflecting those of deep Atlantic water and deep-ocean scavenging of dissolved Co. A biogeochemical model of Co cycling was used to support the hypothesis that the majority of the high surface Co in the Arctic was emanating from the shelf. The model showed that the high concentrations of Co observed were due to the large shelf area of the Arctic, as well as to dampened scavenging of Co by manganese-oxidizing (Mn-oxidizing) bacteria due to the lower temperatures. The majority of this scavenging appears to have occurred in the upper 200 m, with minimal additional scavenging below this depth. Evidence suggests that both dissolved Co (dCo) and labile Co (LCo) are increasing over time on the Arctic shelf, and these limited temporal results are consistent with other tracers in the Arctic. These elevated surface concentrations of Co likely lead to a net flux of Co out of the Arctic, with implications for downstream biological uptake of Co in the North Atlantic and elevated Co in North Atlantic Deep Water. Understanding the current distributions of Co in the Arctic will be important for constraining changes to Co inputs resulting from regional intensification of freshwater fluxes from ice and permafrost melt in response to ongoing climate change.
    Beschreibung: This work was supported by National Science Foundation Ocean Sciences (NSF OCE) grants (grant nos. 1435056, 1736599, and 1924554) to Mak A. Saito, as well as by a Woods Hole Oceanographic Institution Postdoctoral Scholar grant to Randelle M. Bundy and Mattias R. Cape. Mariko Hatta was supported by NSF OCE grant no. 1439253. Alessandro Tagliabue was supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (BYONIC, grant no. 724289). Benjamin S. Twining was supported by NSF OCE grant no. 1435862. Peter L. Morton was supported by NSF OCE grant no. 1436019, and a portion of the work was completed at the NHMFL, which is supported by the National Science Foundation through DMR-1644779 and the State of Florida. Jay T. Cullen was supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada and an International Polar Year (IPY) Canada grant.
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 7
    facet.materialart.
    Unbekannt
    The GEOTRACES Intermediate Data Product 2017 (2018)
    Elsevier
    Details
    Publikationsdatum: 2022-05-25
    Beschreibung: © 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.
    Beschreibung: 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.
    Beschreibung: 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.
    Schlagwort(e): GEOTRACES ; Trace elements ; Isotopes ; Electronic atlas ; IDP2017
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 8
    facet.materialart.
    Unbekannt
    The GEOTRACES Intermediate Data Product 2017 (2018)
    Elsevier
    In:  Chemical Geology, 493 . pp. 210-223.
    Details
    Publikationsdatum: 2021-02-08
    Beschreibung: 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.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.chemgeo.2018.05.040
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 9
    facet.materialart.
    Unbekannt
    Dissolved iron and manganese in the Canadian Arctic Ocean: On the biogeochemical processes controlling their distributions (2020)
    Elsevier
    Details
    Publikationsdatum: 2023-02-08
    Beschreibung: Dissolved iron (DFe) and manganese (DMn) are essential micronutrients involved in vital phytoplankton physiological pathways, and their deficit can limit primary production in otherwise nutrient-replete surface ocean waters. In this work we present the spatial distributions and biogeochemical cycling of these metals across the Canadian GEOTRACES transect in the Canadian Arctic Ocean during the summer and autumn of 2015. Surface concentrations are dominated by freshwater inputs showing a strong negative correlation with salinity, especially for DMn which behaves more conservatively than DFe. The highest surface concentrations were measured in the Canadian Arctic Archipelago (Fe: 0.401–1.91 and Mn: 4.33–9.54 nmol kg−1) and the Canada Basin (Fe: 0.225–0.479 and Mn: 3.93–7.02 nmol kg−1), regions highly influenced by riverine inputs, whereas the lowest values were found in the Labrador Sea (Fe: 0.106–0.362 and Mn: 0.450–1.09 nmol kg−1) where freshwater inputs diminished and phytoplankton uptake increased. Subsurface and deep water distributions for both metals are largely controlled by a complex balance between sources (advective inputs and organic matter remineralization) and removal processes. The subsurface peaks (∼100–300 m) observed in the Canada Basin (Fe: 0.541 ± 0.060 and Mn: 1.38 ± 0.42 nmol kg−1) and Baffin Bay (Fe: 0.753–1.03 nmol kg−1) were advected from the Chukchi Sea and the Canadian Arctic Archipelago respectively, where DFe and DMn are released from the benthic boundary layer in these shelf-dominated environments. Advective sources associated with the Arctic Circumpolar Boundary Current, rather than vertical fluxes of DFe and DMn in sinking particles, dominate metal distributions in the deep Canada Basin waters (〉300 m). In the highly productive Baffin Bay and the Labrador Sea, organic matter remineralization is a notable source of DFe and DMn to deep waters. In the deepest waters (〉1000 m), scavenging of DFe and DMn govern their vertical distributions; a pseudo-first order scavenging model explained the continuous removal of DMn in the Canada Basin, where the concentrations reach uniformly low concentrations (0.150 ± 0.004 nmol kg−1) after ∼400 years. Applying this DMn scavenging model we were able to estimate the age (120–190 years) of deep Baffin Bay waters, a topic of discussion for many years.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 10
    facet.materialart.
    Unbekannt
    A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic (2022)
    AGU (American Geophysical Union) | Wiley
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: Recent studies, including many from the GEOTRACES program, have expanded our knowledge of trace metals in the Arctic Ocean, an isolated ocean dominated by continental shelf and riverine inputs. Here, we report a unique, pan-Arctic linear relationship between dissolved copper (Cu) and nickel (Ni) present north of 60°N that is absent in other oceans. The correlation is driven primarily by high Cu and Ni concentrations in the low salinity, river-influenced surface Arctic and low, homogeneous concentrations in Arctic deep waters, opposing their typical global distributions. Rivers are a major source of both metals, which is most evident within the central Arctic's Transpolar Drift. Local decoupling of the linear Cu-Ni relationship along the Chukchi Shelf and within the Canada Basin upper halocline reveals that Ni is additionally modified by biological cycling and shelf sediment processes, while Cu is mostly sourced from riverine inputs and influenced by mixing. This observation highlights differences in their chemistries: Cu is more prone to complexation with organic ligands, stabilizing its riverine source fluxes into the Arctic, while Ni is more labile and is dominated by biological processes. Within the Canadian Arctic Archipelago, an important source of Arctic water to the Atlantic Ocean, contributions of Cu and Ni from meteoric waters and the halocline are attenuated during transit to the Atlantic. Additionally, Cu and Ni in deep waters diminish with age due to isolation from surface sources, with higher concentrations in the younger Eastern Arctic basins and lower concentrations in the older Western Arctic basins.
    Materialart: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: other
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...