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SR3 2018 Particulate Iron Data

The following dataset contains particulate iron data collected during the 2018 occupation of the CLIVAR SR03 (GEOTRACES GS01) transect south of Tasmania, Australia. This data is used ancillary to measurements of dissolved iron in the same transect for a manuscript in preparation by Traill et al. (2023).


While modelling efforts have furthered our understanding of marine iron biogeochemistry and its influence on carbon sequestration, observations of dissolved iron (dFe) and its relationship to physical, chemical and biological processes in the ocean are needed to both validate and inform model parameterisation. Where iron comes from, how it is transported and recycled, and where iron removal takes place, are critical mechanisms that need to be understood to assess the relationship between iron availability and primary production. To this end, hydrographic and trace metal observations across the GO-SHIP section SR3, south of Tasmania, Australia, have been analysed in tandem with the novel application of an optimum multiparameter analysis. From the trace-metal distribution south of Australia, key differences in the drivers of dFe between oceanographic zones of the Southern Ocean were identified. In the subtropical zone, the source of dFe was constrained by waters advected off the continental shelf, and by remineralization in recirculated modified mode and intermediate water masses of the Tasman Outflow. In the subantarctic zone, the seasonal replenishment of dFe in Antarctic surface and mode waters appears to be sustained by iron recycling in the underlying mode and intermediate waters. In the southern zone, the dFe distribution is likely driven by dissolution and scavenging by high concentrations of particles along the Antarctic continental shelf and slope, entrained in high salinity shelf water. This approach to trace metal analysis may prove useful in future transects for identifying key mechanisms driving marine dissolved trace metal distributions.

Simple

Identification info

Date (Publication)
2023-05-14T00:00:00

Resource provider

Institute for Marine and Antarctic Studies (IMAS)
Private Bag 129
Hobart
Tasmania
7001
Australia

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Traill, Christopher
Hobart
TAS
7001
Australia
ORCID ID >

Collaborator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - van der Merwe, Pier
Private Bag 129
Hobart
TAS
7001
Australia
ORCID ID >

Status
Completed

Author

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Traill, Christopher
Hobart
TAS
7001
Australia
ORCID ID >

Co-author

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - van der Merwe, Pier
Hobart
TAS
7001
Australia
ORCID ID >

Topic category
  • Oceans

Extent

N
S
E
W


Temporal extent

Time period
2018-01-11 2019-04-30

Vertical element

Minimum value
0
Maximum value
4000
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned
Keywords (Theme)
  • Particulate iron
  • GEOTRACES
Global Change Master Directory Earth Science Keywords, Version 8.5
  • EARTH SCIENCE | TERRESTRIAL HYDROSPHERE | WATER QUALITY/WATER CHEMISTRY | CONTAMINANTS | TRACE METALS
  • EARTH SCIENCE | OCEANS | OCEAN CHEMISTRY
  • EARTH SCIENCE | OCEANS | OCEAN CHEMISTRY | NUTRIENTS
AODN Discovery Parameter Vocabulary
  • Cruise
  • Station
  • Latitude
  • Longitude
  • Depth
  • Total particulate iron (pFe) concentration
  • Sampling notes
  • particulate iron data quality flag
  • Method
AODN Geographic Extents Vocabulary
  • States, Territories (Australia) | States, Territories (Australia) | Tasmania
  • Continents | Continents | Antarctica
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
  • Chemical Oceanography
  • Marine Geoscience

Resource constraints

Use limitation
Data, products and services from IMAS are provided "as is" without any warranty as to fitness for a particular purpose.

Resource constraints

Other constraints
This dataset is the intellectual property of the University of Tasmania (UTAS) through the Institute for Marine and Antarctic Studies (IMAS).

Resource constraints

Linkage
https://licensebuttons.net/l/by-nc/4.0/88x31.png

License Graphic

Title
Creative Commons Attribution-NonCommercial 4.0 International License
Alternate title
CC-BY-NC
Edition
4.0


>

Website
https://creativecommons.org/licenses/by-nc/4.0/

License Text

Other constraints
Cite data as: Traill, C. D., & van der Merwe, P. (2023). SR3 2018 Particulate Iron Data [Data set]. Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS). https://doi.org/10.25959/4T9E-XJ78
Language
English
Character encoding
UTF8

Content Information

Content type
Physical measurement

Identifier

Code
Cruise
Name
NA

Identifier

Code
Station
Name
NA

Identifier

Code
Latitude
Identifier
http://vocab.nerc.ac.uk/collection/P06/current/UAAA
Name
Degrees

Identifier

Code
Longitude
Identifier
http://vocab.nerc.ac.uk/collection/P06/current/UAAA
Name
Degrees

Identifier

Code
Depth
Identifier
http://vocab.nerc.ac.uk/collection/P06/current/ULAA
Name
Metres

Identifier

Code
Total particulate iron (pFe) concentration
Name
nanomoles per litre

Identifier

Code
Sampling notes
Name
NA

Identifier

Code
particulate iron data quality flag
Name
SeaNet data flag scheme

Identifier

Code
Method
Name
NA

Distribution Information

Distribution format
  • CSV

OnLine resource
DATA ACCESS - direct download in CSV format

OnLine resource
imas:SR3_2018_Particulate_Iron_samples

MAP - Locations of particulate iron sampling

OnLine resource
imas:SR3_2018_particulate_iron_samples

This OCG WFS service returns the sampling data for download in multiple formats, including CSV.

OnLine resource
View and download this data through the interactive IMAS Data Portal.

Resource lineage

Statement
Particulate trace metal samples were collected from a combination of in situ pump (ISP) profiles at 8 of the TMR stations (super-stations) and 4 L subsamples taken from the TMR Niskin bottles at 19 of the TMR stations (sampling locations given in Figure 3b). Full details of ISP particulate trace metal preparation, sampling and analytical techniques can be found in van der Merwe et al. (2019). 4 L subsamples from the TMR Niskin bottles were filtered onto paired, 25 mm, 0.8 µm Supor polyethersulfone (PES) membrane filters giving an effective pore diameter of 0.45 µm (Bishop et al., 2012) and matching the filters used on the ISPs. Due to the low volume of the Niskin filtrations, these filters were only subjected to a complete acid digestion using trace-metal grade (Seastar Baseline) concentrated hydrofluoric (HF), hydrochloric (HCl) and nitric acids (HNO3), while the 42 mm diameter subsamples of the 142 mm diameter ISP filters were subjected to a weak chemical leach (Berger et al., 2008) to separate the chemically labile from the refractory particulate fractions prior to a total digestion. To make these fractions comparable here, we summed the labile and refractory Fe fractions collected using the ISPs to give total pFe. The extra processing step required to determine the labile fraction completed on the ISP samples can lead to errors. However, comparison between the sum of these fractions and coincident total digestions on ISP subsamples from the same filter revealed recoveries of 101 ± 9.3 % (n = 3) for pFe, indicating that the methods are comparable. Certified reference material BCR-414 (Plankton for trace element analysis, European Commission – Joint Research Centre) was analysed to assess method accuracy. Results for pFe were 1.80 ± 0.009 g/kg (n = 3) while the certified value is 1.85 ± 0.19 g/kg giving a recovery of 97%. References: Berger, C. J. M., Lippiatt, S. M., Lawrence, M. G., & Bruland, K. W. (2008). Application of a chemical leach technique for estimating labile particulate aluminum, iron, and manganese in the Columbia River plume and coastal waters off Oregon and Washington. Journal of Geophysical Research, 113. https://doi.org/10.1029/2007jc004703 Bishop, J. K. B., Lam, P. J., & Wood, T. J. (2012). Getting good particles: Accurate sampling of particles by large volume in-situ filtration. Limnology and Oceanography: Methods, 10(9), 681-710. https://doi.org/10.4319/lom.2012.10.681 van der Merwe, P., Wuttig, K., Holmes, T., Trull, T. W., Chase, Z., Townsend, A. T., Goemann, K., & Bowie, A. R. (2019). High Lability Fe Particles Sourced From Glacial Erosion Can Meet Previously Unaccounted Biological Demand: Heard Island, Southern Ocean. Frontiers in Marine Science, 6. https://doi.org/10.3389/fmars.2019.00332
Hierarchy level
Dataset
Hierarchy level
Dataset

Metadata

Metadata identifier
urn:uuid/66c53305-9883-40fc-b2d8-90d364129118

Language
English
Character encoding
UTF8

Distributor

IMAS Data Manager - Data Officer
Institute for Marine and Antarctic Studies
Private Bag 129
Hobart
Tasmania
7001
Australia
Institute for Marine and Antarctic Studies (IMAS) website >

Type of resource

Resource scope
Dataset
Name
IMAS Dataset level record
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/66c53305-9883-40fc-b2d8-90d364129118

Point of truth URL of this metadata record

Date info (Revision)
2023-10-30T11:08:37
Date info (Creation)
2023-05-10T00:00:00
Date info (Publication)
2023-05-14

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

GEOTRACES Particulate iron
AODN Discovery Parameter Vocabulary
Cruise Depth Latitude Longitude Method Sampling notes Station Total particulate iron (pFe) concentration particulate iron data quality flag
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Chemical Oceanography Marine Geoscience
Global Change Master Directory Earth Science Keywords, Version 8.5
EARTH SCIENCE | OCEANS | OCEAN CHEMISTRY EARTH SCIENCE | OCEANS | OCEAN CHEMISTRY | NUTRIENTS EARTH SCIENCE | TERRESTRIAL HYDROSPHERE | WATER QUALITY/WATER CHEMISTRY | CONTAMINANTS | TRACE METALS

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Read here the full details and access to the data.

Associated resources

Not available


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