IMAS Metadata Catalogue
Output data for extended optimum multiparameter analysis (OMP) SR3 2018
This dataset contains the input and output data for an extended optimum multiparameter analysis (eOMP). Input data for parameters are given (temperature, salinity, oxygen, nitrate, phosphate and silicate), as obtained from the cited CSIRO open access CTD bottle data for the 2018 SR3 occupation. Output parameters are the proportional contribution of 8 water masses that were defined in the eOMP analysis. The output remineralization estimate, Delta-O, is also given. All data are referenced to depth and geographical position (latitude, longitude) from corresponding CTD bottle data.
The eOMP used here was configured following Pardo et al. (2017). Details on the equations, parameterization and end-members that characterize the regional oceanography can also be found in the Supplementary Materials of Traill et al. (2023), including the robustness of the OMP analysis and the uncertainties of both the SWTs’ contributions and the ΔO parameter (Sections S1.2 and S1.3, Table S1, Table S2, Table S3).
Simple
Identification info
- Date (Publication)
- 2023-10-23T00:00:00
Resource provider
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS)
Private Bag 129
Hobart
Tasmania
7001
Australia
Principal investigator
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Traill, Christopher
Private Bag 129
Hobart
TAS
7001
Australia
- Status
- Completed
Author
- Topic category
-
- Oceans
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2021-11-21 2022-10-27
Vertical element
- Minimum value
- 0
- Maximum value
- 5000
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
- Global Change Master Directory Earth Science Keywords, Version 8.5
- AODN Discovery Parameter Vocabulary
-
- Bottom_Depth
- Pressure (measured variable) in the water body exerted by overlying sea water only
- Temperature of the water body
- potential temperature
- Practical salinity of the water body
- Concentration of oxygen {O2} per unit mass of the water body
- Concentration of silicate {SiO4} per unit mass of the water body
- Concentration of phosphate {PO4} per unit mass of the water body
- Concentration of nitrate {NO3} per unit mass of the water body
- Subtropical Central Water
- Subantarctic Mode Water
- High Salinity Shelf Water
- Antarctic Surface Water
- Antarctic Intermediate Water
- Circumpolar Deep Water
- Antarctic Bottom Water
- Pacific and Indian old Deep Water
- Delta Oxygen
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: Conde Pardo, P., & Traill, C. D. (2023). Output data for extended optimum multiparameter analysis (OMP) SR3 2018 [Data set]. Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS). https://doi.org/10.25959/QW3R-F968
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Mechanistic constraints on the drivers of Southern Ocean meridional iron distributions between Tasmania and Antarctica (In review, Global Biogeochemical Cycles).
Content Information
- Content type
- Physical measurement
Identifier
- Code
- Bottom_Depth
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/ULAA
- Name
- Metres
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPDB
- Name
- Decibars
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPAA
- Name
- Degrees Celsius
Identifier
- Code
- potential temperature
- Name
-
Tpot
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPAA
- Name
- Degrees Celsius
Identifier
- Identifier
- http://vocab.aodn.org.au/def/unitsofmeasure/entity/481
- Name
- Practical Salinity Unit
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/KGUM
- Name
- Micromoles per kilogram
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/KGUM
- Name
- Micromoles per kilogram
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/KGUM
- Name
- Micromoles per kilogram
Identifier
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/KGUM
- Name
- Micromoles per kilogram
Identifier
- Code
- Subtropical Central Water
- Name
-
STCW
- Name
- fractional proportion
Identifier
- Code
- Subantarctic Mode Water
- Name
-
SAMW
- Name
- fractional proportion
Identifier
- Code
- High Salinity Shelf Water
- Name
-
HSSW
- Name
- fractional proportion
Identifier
- Code
- Antarctic Surface Water
- Name
-
AASW
- Name
- fractional proportion
Identifier
- Code
- Antarctic Intermediate Water
- Name
-
AAIW
- Name
- fractional proportion
Identifier
- Code
- Circumpolar Deep Water
- Name
-
CDW
- Name
- fractional proportion
Identifier
- Code
- Antarctic Bottom Water
- Name
-
AABW
- Name
- fractional proportion
Identifier
- Code
- Pacific and Indian old Deep Water
- Name
-
PIDW
- Name
- fractional proportion
Identifier
- Code
- Delta Oxygen
- Name
-
Delta_O
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/KGUM
- Name
- Micromoles per kilogram
Distribution Information
- Distribution format
-
-
CSV
-
CSV
- OnLine resource
-
DATA ACCESS - Optimum Multiparameter Analysis ST3 2023 [CSV]
Resource lineage
- Statement
- The eOMP was parameterized following Pardo et al. (2017) and references below are provided in the accompanying manuscript and supplement by Traill et al. (2023). The eOMP was solved for the SWTs described in Table S1 and Delta-O value at each sample point using hydrographic and nutrient measurements described in section 2.2. The system was constrained to water mass mixing groups described in Table S2. To estimate the relative proportion of SWTs at each sample point, the set of equations is solved via a non-negative weighted least squares method through each of the 11 SWTs (Table S1) according to mixing groups (Pardo et al., 2017). Mixing groups (Table S2) further limit the contribution of SWTs at each sampling point to a subset of SWTs, reducing the unknowns at each sample point and increasing the degrees of freedom. Mixing groups are arranged according to the possible mixing interfaces between SWTs with continuity maintained by connecting mixing groups through one or more shared SWT (Table S2). The arrangement of mixing groups and SWT parameterization is derived from previously described hydrography along the SR3 transect (Sokolov & Rintoul, 2000; Sloyan & Rintoul, 2001b; Sokolov & Rintoul, 2009; Herraiz-Borreguero & Rintoul, 2011; Pardo et al., 2017) and in section S1.3. The SWTs’ conservative properties (θ and S) were defined based on the bibliography available (Table S1, Table S3). The values of the non-conservative variables of the SWTs (Table S3) were initially extrapolated from regression lines with θ and S (Poole & Tomczak, 1999) and then subjected to an iterative process inside the OMP in order to obtain the types that best fit the cruise data. In order to check the sensitivity of the model to variations in the environment and variations due to measurement errors (Leffanue & Tomczak, 2004), we’ve run a perturbation analysis of uncertainties (Lawson & Hanson, 1995). The uncertainties of the SWTs fractions and of ΔO shown in Table S3 are the mean standard deviation of 100 perturbation runs.
- Hierarchy level
- Dataset
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
-
urn:uuid/77d8eeff-7b54-4f43-993e-daef26c08cab
- Language
- English
- Character encoding
- UTF8
Distributor
IMAS Data Manager - Data Officer
Institute for Marine and Antarctic Studies
Private Bag 129
Hobart
Tasmania
7001
Australia
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/77d8eeff-7b54-4f43-993e-daef26c08cab
Point of truth URL of this metadata record
- Date info (Creation)
- 2023-10-13T00:00:00
- Date info (Revision)
- 2023-10-30T11:08:17
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available