5af9e5cf-657d-4640-8ff3-dd3ec2f43367 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2022-06-27 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Observational data and model output for sediment nutrient cycling at Patagonian fjords 2022-06-27 creation 2022-06-27 revision 2022-06-27 publication 2022-06-27 released 1.0 https://doi.org/10.5285/5af9e5cf-657d-4640-8ff3-dd3ec2f43367 doi GB/NERC/BAS/PDC/01647 https://data.bas.ac.uk/ NE/P003133/1 award Please cite this item as: Ng, H., Hawkings, J., Wadham, J., Hendry, K., Conway, T., Bertrand, S., Sieber, M., Summers, B., Freitas, F., Ward, J., Pryer, H., & Arndt, S. (2022). Observational data and model output for sediment nutrient cycling at Patagonian fjords (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/5af9e5cf-657d-4640-8ff3-dd3ec2f43367 Glacier meltwater supplies a significant amount of silicon (Si) and iron (Fe) sourced from weathered bedrock to downstream ecosystems. However, the extent to which these essential nutrients reach the ocean is regulated by the nature of the benthic cycling of dissolved Si and Fe within fjord systems, given the rapid deposition of reactive particulate fractions at fjord heads. The dataset is used to examine the benthic cycling of the two nutrients at Patagonian fjord heads through geochemical analyses of sediment pore waters and reaction-transport modeling for Si. The dataset contains: (i) pore water redox-sensitive nitrate (NO3-) and dissolved manganese (DMn) concentration data, nutrient dissolved silicon (DSi) and iron (DFe) concentration and isotope data (delta30 Si, delta56 Fe); (ii) mild alkaline leachable (Si-Alk) and acid leachable (Si-HCl) sediment silica content and isotope data; and (iii) reaction transport model output for the benthic cycling of Si. The pore water and sediment samples were collected from four sites: SJ (48.228o S, 73.502o W, 106 m depth), SH (47.679 S, 73.715 W, 203 m depth), SP (48.179 S, 73.347 W, 248 m depth) and SB (47.787 S, 73.610 W, 151 m depth) in the Baker-Martinez Fjord Complex on the research vessel Sur-Austral in February 2017. Funded by NERC-CONICYT grant NE/P003133/1-PII20150106. No credit. completed Ng, Hong Chin University of Bristol Researcher author Hawkings, Jon R. University of Pennsylvania Researcher author Wadham, Jemma L. University of Bristol Researcher author Hendry, Katharine R. British Antarctic Survey Researcher author Conway, Tim M. University of South Florida Researcher author Bertrand, Sebastien Ghent University Researcher author Sieber, Matthias University of South Florida Researcher author Summers, Brent A. University of South Florida Researcher author Freitas, Felipe S. University of Bristol Researcher author Ward, James P.J. University of Bristol Researcher author Pryer, Helena V. University of Cambridge Researcher author Arndt, Sandra Universite Libre de Bruxelles Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Coastal Processes > Fjords EARTH SCIENCE > Oceans > Ocean Chemistry > Nutrients EARTH SCIENCE > Oceans > Ocean Chemistry > Stable Isotopes theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Early diagenesis fjord nutrient cycling reaction transport model stable isotopes theme Patagonia, Baker-Martinez Fjord Complex Chile place Oceanographic geographical features theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data released under Open Government Licence V3.0: otherRestrictions No restrictions apply. url url crossReference textTable eng utf8 environment oceans -73.715 -73.347 -48.228 -47.679 2018-01-18 2020-11-28 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/plain text/csv bytes 25600 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5af9e5cf-657d-4640-8ff3-dd3ec2f43367 WWW:LINK-1.0-http--link Get Data Download data download bytes 25600 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5af9e5cf-657d-4640-8ff3-dd3ec2f43367 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Silicon and nitrate concentrations were measured with spectrophotometry. Dissolved iron concentration, manganese concentration, iron isotopes and silicon isotopes were measured with inductively coupled plasma-mass spectrometry. The reaction transport model employed is the Biogeochemical Reaction Network Simulator. The model was run under steady state assumption. Pore water data depth resolution: 5 cm - 15 cm Sediment data depth resolution: 10 cm - 50 cm Model data depth resolution: 0.1 cm - 1 cm Data collection: (1) Thermo Scientific X-Series 2 quadrupole inductively coupled plasma-mass spectrometer (dissolved iron and manganese concentration measurements) (2) Thermo-Finnigan Neptune multicollector-inductively coupled plasma-mass spectrometer (silicon and iron isotope measurements) (3) Maple computing environment version 2016.0 (compile inputs for reaction transport modeling) Data quality: The accuracies of the pore water elemental concentration and isotope analyses were assessed with measurements of standard solutions. Errors associated with sediment and pore water analyses were assessed with replicate measurements of samples and standards. Analytical errors for: (i) NO3- concentration is about 0.5%; (ii) dMn concentration and dFe concentration are 0.7% - 8.9%; (iii) DSi concentration is about 2.5%; (iv) Si-Alk content is 25%; (v) Si-HCl content is 15%; (vi) delta30 Si is 0.08 per-mille - 0.34 per-mille, and (vii) delta56 Fe is 0.04 per-mille - 0.08 per-mille. Model's best fit with observational data was determined by minimizing the root-mean-square error. asNeeded completed