RV Investigator TEMPO Voyage: Antarctic Krill Survey Sonobuoy Recordings

RV Investigator voyage IN2021_V01 collected 460 hours of underwater acoustic recordings from 251 deployed sonobuoys between 29 January and 24 March 2021. The data includes Antarctic krill 3D coordinates and marine mammal vocalizations, collected by the Marine National Facility as part of the TEMPO survey. Recordings were contributed to the Australian Ocean Data Network.

Use Cases

• Detect and classify blue whale and sperm whale vocalizations based on acoustic recordings.
• Map marine mammal presence and distribution to complement visual observation studies.
• Analyze ocean noise patterns recorded by DIFAR sonobuoys at 30 nmi intervals.
• Correlate krill abundance data from 3D coordinates with predator acoustic detections.

Strengths

• Contains approximately 460 hours of acoustic recordings.
• Data from 251 deployed sonobuoys provides spatial coverage.
• Specific voyage dates (29 Jan - 24 Mar 2021) and geographic track (Hobart to Hobart) are documented.
• Description lists specific sonobuoy models and target species, including multiple whale and seal types.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats listed (PNG, HTML) suggest the primary acoustic data may not be directly available or may require specific tools.

Provenance

Source

Marine National Facility (MNF) RV Investigator, Australian Ocean Data Network

Collection Method

Acoustic data collected using Directional Frequency Analysis and Recording (DIFAR) sonobuoys deployed at 30 nmi intervals.

Time Range

29 January 2021 to 24 March 2021

Freshness

Last updated 2026-06-16 20:29:26.174972; freshness should be verified.

Geography

Voyage from Hobart (TAS) to Hobart, covering the Australian Antarctic Territory region.