Observational data and model output for sediment nutrient cycling at Patagonian fjords
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.
Simple
- Alternate title
- Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01647
- Date (Publication)
- 2022-06-27
- Identifier
- http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01647
- Maintenance and update frequency
- unknown Unknown
- Keywords
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- NDGO0001
- NERC OAI Harvesting
-
- NERC_DDC
- GCMD Parameter Valids
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- EARTH SCIENCE > Oceans > Coastal Processes > Fjords
- EARTH SCIENCE > Oceans > Ocean Chemistry > Nutrients
- EARTH SCIENCE > Oceans > Ocean Chemistry > Stable Isotopes
- BAS Free-text keywords
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- Early diagenesis
- fjord
- nutrient cycling
- reaction transport model
- stable isotopes
- Use limitation
- Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Metadata language
- EnglishEnglish
- Topic category
-
- Environment
- Oceans
- Begin date
- 2022-03-02
- End date
- 2022-05-20
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Distribution format
-
- Hierarchy level
- dataset Dataset
Domain consistency
- Measure identification
- INSPIRE / Conformity_001
Conformance result
- Date
- Explanation
- See the referenced specification
- Pass
- No
- Statement
- 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.
- File identifier
- GB_NERC_BAS_PDC_01647 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2022-06-27
- Metadata standard name
- NERC profile of ISO19115:2003
- Metadata standard version
- 1.0