RV Investigator Voyage IN2026_V03 Hydrology Data

This record describes Hydrology (HYD) data collected from the Marine National Facility (MNF) RV Investigator voyage IN2026_V03, titled: "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania." The voyage took place between May 14, 2026 and May 22, 2026 (AEST), departing from Hobart and returning to Hobart.

For this voyage, CTD samples were collected and analysed for nutrients, dissolved oxygen, and salinity by the on-board Hydrochemistry team. Please refer to Hydrochemistry output section for more detail on sample types and analyses. Carbon and alkalinity samples were also collected at selected station by chief scientist, Dr. Elizabeth Shadwick to continue the time series established during previous voyage series, with these samples to be analysed on shore by the carbon team once the voyage concludes. Additionally, Thermosalinograph (TSG) samples were continuously collected throughout the voyage, with on-board measurements of their salinity used to calibrate the ship's underway system.

This dataset has been processed (quality-controlled), and archived at the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset is contained in the Voyage Report and Data Processing Report.

Identification info

Alternate title: IN2026_V03 HYD

Date

Credit: The data were processed by Maddy Lahm and Narendra Pati (CSIRO NCMI).

Credit

The MNF must be acknowledged in all outputs derived from Data and/or Samples collected by, or with support from, the MNF. Acknowledge the MNF in outputs with the statement:

“We acknowledge the use of the CSIRO Marine National Facility ( https://ror.org/01mae9353 ) in undertaking this research.”

Acknowledgment and citations should be in all forms of publication including presentations (where the acknowledgement should be on the closing slide), journals, books, reports and related research outputs.

Point of contact

Role	Organisation	Electronic mail address
Custodian	CSIRO NCMI - Information and Data Centre	data-requests-hf@csiro.au data-requests-hf@csiro.au

Role

Organisation

Electronic mail address

Custodian

CSIRO NCMI - Information and Data Centre

data-requests-hf@csiro.au

Topic category

Oceans

Extent

Temporal extent

Time position: 2026-05-14

Time position: 2026-05-22

Maintenance and update frequency: As needed

GCMD Keywords

CSIRO Areas Of Interest

Marine National Facility

CSIRO Equipment

CSIRO Source List

Ship: Investigator (RV)

CSIRO Survey List

Research Voyage: IN2026_V03

CSIRO Project List

SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania

AODN Geographic Extent Names

Resource constraints

Linkage: Attribution 4.0

License Graphic

Linkage: Attribution 4.0

License Text

Access constraints

Use constraints

Other constraints: Data are made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data are supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for their use. ATTRIBUTION STATEMENT: We acknowledge the use of the CSIRO Marine National Facility ( https://ror.org/01mae9353) in undertaking this research. The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility.

Language: English

Character encoding: UTF8

Distribution Information

Distribution format

PDF
NetCDF
XLS
Matlab

OnLine resource: Processing Report (PDF)

Download the Processing Report (PDF format)

OnLine resource: Data Trawler

Link to Data available for this voyage via the Data Trawler

OnLine resource: Hydrology Data (NC)

Download the Hydrology Data (NetCDF format)

OnLine resource: Hydrology Data (CSV)

Download the Hydrology Data (CSV format)

OnLine resource: TSG Data (CSV)

Download the TSG Data (CSV Format)

OnLine resource: TSG Samples Event Logs (CSV)

Download the TSG Samples Event Logs (CSV Format)

OnLine resource: Processing Report Suppplementary Material (CSV)

Link to supplementary material to the processing report (CSV format)

OnLine resource: Investigator Survey

Link to RV Investigator Survey Information, including voyage plans and summaries

OnLine resource: Marine National Facility

Link to the Marine National Facility Homepage

Data quality info

Hierarchy level: Dataset

Report

Result

Explanation: Completeness and Data Quality information: Salinity and dissolved oxygen data quality are good. Nutrients analysed Silicate (SiO4 4- as Si), Phosphate (PO4 3- as P), Nitrate (NO3 - as N) plus Nitrite (NO2 - as N) referred to as NOx, Nitrite (NO2 - as N) and Ammonium (NH4 + as N). Nutrient data quality is good; Japanese KANSO certified reference materials for silicate, phosphate, nitrate and nitrite in seawater (RMNS CW & CS) was included with each analysis run to determine accuracy. QA/QC Nutrient data can be found in the data processing report. All data is GO-SHIP compliant. All data completed. Missing and anomalous data is flagged and noted with explanations in the data processing report (IN2026_V03_HYD_ProcessingReport.pdf).

Resource lineage

Statement

Data source: original field data.

Nutrient samples were analysed using segmented flow SEAL AA500 and results are in unit of µmol/L. In-house methods: SOP 001, SOP 002, SOP 003 and SOP 004 were used to analyse nutrients.

Please cite the following paper when using Hydrochemistry data for silicate, phosphate, nitrate+nitrite (NOx) and nitrite analysis:

Rees, C., L. Pender, K. Sherrin, C. Schwanger, P. Hughes, S. Tibben, A. Marouchos, and M. Rayner. 2018. Methods for reproducible shipboard SFA nutrient measurement using RMNS and automated data processing. Limnol. Oceanogr: Methods. doi:10.1002/Iom3.10294

If publishing ammonium data, please cite the following:

Rees, C., Janssens, J., Sherrin, K., Hughes, P., Tibben, S., McMahon, M., McDonald, J., Camac, A., Schwanger, C. and Marouchos, A., (2021) “Method for Reproducible Shipboard Segmented Flow Analysis Ammonium Measurement Using an In-House Reference Material for Quality Control.” Frontiers in Marine Science, 8. doi:10.3389/fmars.2021.581901

Salinity samples were analysed using Guildline 8400B Autosal Lab Salinometer and OSIL software. The salinometer was calibrated with IAPSO standard seawater P168. In-house method SOP 006 was used to analyse salinity, units are Practical Salinity Unit (PSU).

Dissolved Oxygens were analysed using Scripps UV titrator and software, units measured in mL/L and converted to µmol/L. Dissolved oxygen was analysed using in-house method SOP 005.

All data was processed with HyPro 5.9.

Nutrient data decimal places within the CSV file; silicate is 1 decimal place, nitrite is 3 decimal places and NOx (nitrate + nitrite), phosphate and ammonium is 2 decimal places. Any concentration below the detection limit, including negative values, should be referred to as zero.

Oxygen Data is displayed to 3 decimal places. Salinity data is displayed to 4 decimal places.

Any essential data processing notes and parameters are described in Hydrochemistry data process report (IN2026_V03_HYD_ProcessingReport.pdf).

Hierarchy level: Dataset

Reference System Information

Reference system identifier: EPSG/WGS 84 (EPSG:4326)

Metadata

Metadata identifier: urn:uuid/19260bec-8bac-4737-9bd6-8c596f376bf9

Language: English

Character encoding: UTF8

Contact

Role	Organisation	Electronic mail address
Point of contact	CSIRO NCMI - Information and Data Centre	data-requests-hf@csiro.au

Type of resource

Resource type: Dataset

Metadata linkage

http://marlin.csiro.au/geonetwork/srv/api/records/19260bec-8bac-4737-9bd6-8c596f376bf9

Date info (Creation): 2026-07-13T01:08:58.699957Z

Date info (Creation): 2026-06-29T04:26:00.48673Z

Date info (Creation): 2026-06-26T00:02:02.993791Z

Date info (Creation): 2026-06-25T09:53:47.315817Z

Date info (Creation): 2026-06-25T09:51:12.844321Z

Date info (Creation): 2026-06-25T09:47:16.25144Z

Date info (Creation): 2026-06-25T09:37:11.217962Z

Date info (Creation): 2026-06-24T08:53:10.497876Z

Date info (Creation): 2026-03-27T01:54:03.669004Z

Date info (Creation): 2026-02-17T02:49:42.55303Z

Date info (Revision): 2026-07-13T01:09:29.985016Z

Metadata standard

Title: ISO 19115-3:2018

Title: Marine Community Profile

Date (Creation): 2019-05-30

Edition: 3.0

Edition date: 2019-05-30T00:00:00

Cited responsible party

Role	Organisation	Electronic mail address
Custodian	Marine Community Profile Governance Committee

Overviews

Voyage CTD track

Spatial extent

Provided by

Access to the catalogue

Read here the full details and access to the data.

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