Southern Ocean ADCP Current Measurements from RV Investigator Voyage IN2024_V02

Acoustic Doppler Current Profiler (ADCP) data collected during the RV Investigator voyage IN2024_V02 from March 31 to April 19, 2024. The data were collected for the Southern Ocean Time Series (SOTS) mooring studies southwest of Tasmania using RDI Ocean Surveyor and WH75 instruments. It was processed using the Common Ocean Data Access System (CODAS) and archived by CSIRO.

Use Cases

• Analyze current velocity profiles from the OS150 and OS75 instruments to study ocean dynamics near mooring sites.
• Investigate the impact of instrument configuration, such as the port keel transducer located 8.0m below water, on ADCP data quality.
• Compare narrowband (nb) mode data from the OS150/OS75 with broadband mode data from the WH75 for methodological studies.
• Examine temporal gaps in the WH75 record due to checksum errors and suspected water ingress for instrument reliability analysis.

Strengths

• Data collected during a dedicated 20-day research voyage (March 31 to April 19, 2024) for climate and carbon cycle studies.
• Processed and quality-controlled using the established Common Ocean Data Access System (CODAS) methodology.
• Includes data from multiple ADCP instruments (OS150, OS75, WH75) with documented operational modes and configurations.

Limitations

• Data collection was interrupted for the WH75 instrument due to persistent checksum errors and suspected water ingress.
• ADCPs were switched off during specific operations (EK80 surveying), creating gaps in the time series record.
• The dataset's specific volume (rows, size) and columnar structure are not detailed in the provided metadata.

Provenance

Source

CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).

Collection Method

Collected using Acoustic Doppler Current Profilers (ADCPs) and the University of Hawaii Data Acquisition System (UHDAS), post-processed with CODAS.

Time Range

March 31, 2024 to April 19, 2024.

Freshness

Data from April 2024, with metadata last updated in March 2026.

Geography

Southern Ocean, southwest of Tasmania, departing from and returning to Hobart.