RV Investigator IN2021_V01: Antarctic Krill Survey Sonobuoy Recordings

From 29 January to 24 March 2021, the RV Investigator voyage IN2021_V01 collected acoustic data and krill coordinates off the Australian Antarctic Territory. The dataset includes approximately 460 hours of recordings from 251 deployed DIFAR sonobuoys. Recordings were made by the Marine National Facility as part of the TEMPO survey to study krill abundance and marine mammal presence.

Use Cases

• Detect and classify blue whale and sperm whale vocalizations based on acoustic recordings.
• Map marine mammal distribution and presence to complement visual predator observations.
• Analyze ocean noise and ambient soundscapes from long-duration sonobuoy deployments.
• Correlate acoustic detections with 3D krill coordinate data for predator-prey relationship studies.

Strengths

• Approximately 460 hours of acoustic recordings provide substantial temporal coverage.
• Data from 251 sonobuoy deployments offers extensive spatial sampling.
• Specific mention of multiple whale and seal species likely to be detected enhances utility for biodiversity studies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network via Marine National Facility RV Investigator.

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 (AEST).

Freshness

Last updated 2026-05-04 23:46:59.012850; freshness should be verified.

Geography

Voyage from Hobart (TAS) to Hobart, focusing on the Australian Antarctic Territory.