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acoustic_index_of_aggregation_in_sea_water

Concept · Climate and Forecast Standard Names · Draft

Terms

  • Preferred term, Draft

Definition

  • Acoustic index of aggregation is the depth integral of squared volume backscattering coefficient divided by the squared area backscattering coefficient. Volume backscattering coefficient is the linear form of acoustic_volume_backscattering_strength_in_sea_water. Area backscattering coefficient is the integral of the volume backscattering coefficient over a defined distance. The parameter is computed to provide a value that represents the patchiness of biomass in the water column in the field of fisheries acoustics - the value is high when small areas are much denser than the rest of the distribution. The parameter is also the reciprocal of acoustic_equivalent_area_in_sea_water. For further details see Urmy et. al (2012) doi:10.1093/icesjms/fsr205 and Woillez et. al (2007) doi.org/10.1093/icesjms/fsm025.@en

Note

    Example

      Additional technical information

      Organization
      • MSCR testers
      Created at
      07/05/2025, 6.08
      Modified at
      07/05/2025, 6.08
      URI
      http://vocab.nerc.ac.uk/collection/P07/current/UM50UKPG/