acoustic_index_of_aggregation_in_sea_water

complete
Created: 2 Apr 2024
Proposer: John Horne, Mark Yamane, Rob Cermak
Proposed Date: 2024-03-18
#298
Change Date: 2 Apr 2024, 12:16 p.m.
acoustic_index_of_aggregation_in_sea_water m-1 [UPRM] P07 id: UM50UKPG
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.

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