Benthic silica flux magnitudes and silicon isotopic composition of marine sediment pore waters and solid phase leachates for the Barents Sea (summer 2017-2019)

This data product comprises 5 files, containing marine sediment pore water and solid phase leachate silicon (Si) isotopic and element concentration data, as well as benthic silica flux magnitudes derived from core incubation experiments and sediment biogenic silica contents. Samples were collected over three cruises of the Changing Arctic Ocean Seafloor (ChAOS) project summer sampling campaigns in the Barents Sea between 2017 and 2019 aboard the RRS James Clark Ross (cruises JR16006, JR17007 and JR18006). The aim of this study was to improve our mechanistic understanding of the cycling of Si within the Arctic Ocean seafloor through measurement of stable Si isotopes in the dissolved Si pool and the solid phase sources.

This project was part of the Changing Arctic Ocean programme, funded by the Natural Environment Research Council (NERC) (grant no. NE/P005942/1).

Date (Creation): 2021-09-09

Date (Revision): 2021-09-09

Date (Publication): 2021-09-09

Date (released): 2021-09-09

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/8933af23-e051-4166-b63e-2155330a21d8

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01557

Codespace: https://data.bas.ac.uk/

Unique resource identifier: NE/P005942/1

Codespace: award

Other citation details: Please cite this item as: Ward, J., Henley, S., Faust, J., & Sales de Freitas, F. (2021). Benthic silica flux magnitudes and silicon isotopic composition of marine sediment pore waters and solid phase leachates for the Barents Sea (summer 2017-2019) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/8933af23-e051-4166-b63e-2155330a21d8

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Bristol	Ward, James PJ		Author
University of Edinburgh	Henley, Sian F		Author
University of Bremen	Faust, Johan C		Author
University of Bristol	Sales de Freitas, Felipe		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency: As needed

Maintenance note: Completed

Global Change Master Directory (GCMD) Science Keywords

Theme

Arctic Ocean
benthic flux
biogenic silica
core incubation
pore water
silicon isotopes

Place

Barents Sea

GEMET - INSPIRE themes, version 1.0

Oceanographic geographical features

Access constraints: Other restrictions

Other constraints: no limitations to public access

Access constraints: Other restrictions

Other constraints: no limitations

Use constraints: License

Other constraints: Open Government Licence v3.0

Use constraints: Other restrictions

Other constraints: Data released under Open Government Licence V3.0:

Use constraints: Other restrictions

Other constraints: None.

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: doi

Codespace: doi

Association Type: Cross reference

Unique resource identifier: url

Codespace: url

Association Type: Cross reference

Spatial representation type: Text, table

Language: English

Character set: UTF8

Topic category

Environment
Oceans

Begin date: 2017-07-15

End date: 2019-07-16

Supplemental Information: 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.

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier: urn:ogc:def:crs:EPSG::3031

Version: 6.18.3

Distributor

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

Distributor format

Name	Version
text/plain
text/csv

Units of distribution: bytes

Transfer size: 24371

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=8933af23-e051-4166-b63e-2155330a21d8	Get Data

Units of distribution: bytes

Transfer size: 24371

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=8933af23-e051-4166-b63e-2155330a21d8	Get Data

Hierarchy level: Dataset

Statement: Methodology:

ChAOS_1_Pore_Water_DSi: dissolved silicic acid (DSi) concentrations of pore water extracted from sediment cores collected from 6 stations (B03, B13, B14, B15, B16, B17). Three separate Multicorer deployments were carried out at each station for all three cruise years, denoted by the event number. Samples were combined from 4 separate cores of each Multicorer deployment to ensure adequate sample volume was collected. Samples were stored in the dark at 4°C and analysed within 12 hours of collection. Core top water samples were extracted first from sediment cores sampled with the Multicorer, followed by the pore water samples. Pore waters were extracted with Rhizon filters, attached to 30mL plastic syringes using spacers to create a vacuum (resolution of 1 cm from 0.5-2.5 cm below seafloor (cmbsf), 2 cm to 20.5 cmbsf and 5 cm to 35.5 cmbsf), placed in pre-drilled coring tube holes and collected in acid cleaned bottles, which were then acidified with Romil UpA HCl. On-board measurements of DSi concentrations in the pore water samples were carried out with a Lachat Quickchem 8500 flow injection autoanalyzer using certified reference materials for sea water to define the accuracy (KANSO Ltd., Japan), which averaged 2.8% across the three cruises (1.5-5%).

ChAOS_2_Pore_Water_Isotopes: Si isotopic composition of the pore water DSi pool (delta30SiDSi-PW per mil). Samples from one Multicorer deployment from each station and cruise year were sampled for isotopic analysis. B13, B14 and B15 were selected for isotopic analysis as they span the three main hydrographic domains of the Barents Sea (Atlantic Water, Oceanic Polar Front, Arctic Water). Isotopic composition is given in delta notation as a deviation relative to NBS28 Si standard in units of per mil. This sheet also includes pore water NO3- and Fe concentrations, previously published in Freitas et al., (2020) and Faust et al., (2021) respectively. Isotopic analysis was carried out in a clean setting in the Bristol Isotope Group (BIG) laboratory at the University of Bristol. Samples were concentrated using the Mg-induced co-precipitation method (MAGIC) of Karl and Tien (1992) and De Souza et al., (2012). Concentrated samples were then passed through cation exchange columns (Georg et al., 2006) filled with a Bio-Rad AG50W-X12 resin to remove cations. Samples were then doped with H2SO4 (ROMIL-UpA) and 1 M HCl (in-house distilled) prior to isotopic analysis to counteract any potential anionic matrix effects. Isotope data quality was assessed through plotting delta29Si vs delta30Si. Data included in this archive were found to lie along a line of gradient 0.5119, in between that expected of kinetic and equilibrium Si isotopic fractionation. In addition, 71% of samples were measured in duplicate or triplicate (see 'n' for number of replicate measurements of a given sample and ±2 sigma for the standard deviation) and reference Si standards were analysed every 5 samples to determine the long term reproducibility. Measured standards in this study (Diatomite +1.24 ±0.14 per mil (n=116); LMG08 -3.47 ±0.13 per mil (n=46); ALOHA1000 =1.23 ±0.17 per mil (n=30)) agree well with published values (+1.26 ±0.2 per mil; -3.43 ±0.15 per mil; +1.24 ±0.2 per mil respectively) (Hendry et al., 2011; Hendry and Robinson, 2012 ; Grasse et al., 2017).

ChAOS_3_Core_Incubation: results of core incubation experiments carried out on-board (JR18006) for cores collected from stations B03, B13, B14, B15 and B16 to quantify the magnitude of the benthic flux of DSi. Includes DSi concentrations for samples extracted from the core top water at 3 hourly intervals over 24 hours and the Si isotopic composition (delta30SiInc per mil) of such samples at time 0hr, 3hr and 24hr. For B15, 0/6 hr and 21/24 hr samples were combined due to a lack of adequate sample volume. The gradient of the lin...(48)

Data collection:

Megacorer (multicoring device with up to 12 core tubes), National Marine Facilities

Lachat Quickchem 8500 flow injection autoanalyzer

VWR V-1200 spectrophotometer, University of Bristol

Finnigan Neptune Plus High Resolution MC-ICP-MS by Thermo Fisher Scientific, University of Bristol

Agilent Technologies 710 ICP-OES, University of Bristol

Metadata

File identifier: 8933af23-e051-4166-b63e-2155330a21d8 XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2021-09-09

Metadata standard name: ISO 19115 Geographic Information - Metadata

Metadata standard version: ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact

Overviews

Spatial extent

Provided by

Access to the catalogue

Read here the full details and access to the data.

Simple

Distributor

Metadata

Overviews

Spatial extent

Keywords

Provided by

Share on social sites