Passive acoustic monitoring (PAM) data were collected by recorder SV1025 of type Sono.Vault (manufactured by develogic GmbH, Hamburg, Germany) at 59.0438° S, 0.082° E, mooring AWI227-12, in Weddell Sea, Atlantic sector of the Southern Ocean. During a deployment period from December 2012 to December 2014, passive acoustic data were collected from December 2012 to July 2013 (recording period) by SV1025 as part of the Hybrid Antarctic Float Observing System (HAFOS) in the Weddell Sea. The recorder was moored at 1020 m depth and scheduled to record continuously at a sample rate of 5,333 Hz. Further details about the data acquisition and processing of this data set can be found in the accompanying metadata file (see Additional metadata) as well as the data processing report (see Data Processing Report). Passive acoustic data archived here represent data processing Level 1+, according to the standards defined in the associated Standard Operation Procedure (SOP) Glossary (Thomisch et al. 2023a). Further information on data processing with regard to data preparation and standardization can be found in the associated SOP Part 1: Data preparation and standardization (Thomisch et al. 2023b).

Each daily .tar contains the 10-minute audio files (.wav format) collected during the respective day.