Antarctic Krill Vertical Migration and Biomass Data from the 2021 TEMPO Survey

Processed acoustic, biological, and environmental data were collected during the RV Investigator voyage IN2021_V01 between 29 January and 24 March 2021. The dataset includes echosounder observations, krill target strength data, historical length-frequency data, and interpolated chlorophyll concentrations for the Prydz Bay region. These data support investigations of krill abundance, seasonal vertical migration patterns, and particulate organic carbon export.

Use Cases

• Estimate Antarctic krill biomass based on acoustic target strength data mentioned in the description.
• Analyze seasonal vertical migration patterns of krill using processed echosounder observations.
• Model particulate organic carbon export associated with krill faecal pellet production using the provided biological and environmental data.
• Parameterize biogeochemical models with interpolated chlorophyll concentration data for the Prydz Bay region.

Strengths

• Data were collected during a dedicated research voyage (IN2021_V01) spanning from 29 January to 24 March 2021.
• The dataset integrates multiple data types: processed acoustic observations, biological krill data, and environmental chlorophyll concentrations.
• It supports specific investigations into krill abundance, migration, and carbon export, as stated in the description.

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 bias inherent to the Prydz Bay region and the specific voyage track.

Provenance

Source

Australian Ocean Data Network, collected during the Marine National Facility RV Investigator voyage IN2021_V01.

Collection Method

Processed from echosounder observations, biological sampling, and environmental sensors during the TEMPO survey.

Time Range

29 January 2021 to 24 March 2021

Freshness

Last updated 2026-07-10 00:46:17.658085; freshness should be verified.

Geography

East Antarctica, specifically the Prydz Bay region off the Australian Antarctic Territory.