RV Investigator Voyage IN2021_V01 (TEMPO) Sonobuoy Recordings

From 29 January to 24 March 2021, the RV Investigator research voyage IN2021_V01 collected acoustic and krill data off the Australian Antarctic Territory. The dataset contains approximately 460 hours of underwater recordings from 251 deployed DIFAR sonobuoys. It was created by the CSIRO Marlin Data Catalogue as part of the TEMPO survey to quantify krill abundance and study predator observations.

Use Cases

• Detect and classify blue whale and sperm whale vocalizations based on the acoustic recordings.
• Model Antarctic krill distribution and abundance based on the collected 3D coordinate data.
• Study marine mammal presence and distribution as complementary data to visual predator observations.
• Analyze ocean noise patterns recorded by sonobuoys deployed at 30 nautical mile intervals.

Strengths

• Contains approximately 460 hours of acoustic recordings, providing substantial data for analysis.
• Includes data from 251 deployed sonobuoys, suggesting broad spatial coverage.
• Specifically notes high acoustic detectability for blue whales and sperm whales, with likely detections for several other whale and seal species.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic/temporal bias inherent to the specific voyage and data_gov_au source.

Provenance

Source

CSIRO Marlin Data Catalogue

Collection Method

Collected via Directional Frequency Analysis and Recording (DIFAR) sonobuoys deployed from the RV Investigator.

Time Range

29 January to 24 March 2021 (AEST)

Freshness

Last updated 2026-04 16:22:22.221788; freshness should be verified.

Geography

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