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Published (Version of Record)CC BY V4.0, Open Access
Journal article
Marine acoustic zones of Australia
Journal of Marine Science and Engineering, Vol.9(3), Article 340
2021
Abstract
Underwater sound is modelled and mapped for purposes ranging from localised environmental impact assessments of individual offshore developments to large-scale marine spatial planning. As the area to be modelled increases, so does the computational effort. The effort is more easily handled if broken down into smaller regions that could be modelled separately and their results merged. The goal of our study was to split the Australian maritime Exclusive Economic Zone (EEZ) into a set of smaller acoustic zones, whereby each zone is characterised by a set of environmental parameters that vary more across than within zones. The environmental parameters chosen reflect the hydroacoustic (e.g., water column sound speed profile), geoacoustic (e.g., sound speeds and absorption coefficients for compressional and shear waves), and bathymetric (i.e., seafloor depth and slope) parameters that directly affect the way in which sound propagates. We present a multivariate Gaussian mixture model, modified to handle input vectors (sound speed profiles) of variable length, and fitted by an expectation-maximization algorithm, that clustered the environmental parameters into 20 maritime acoustic zones corresponding to 28 geographically separated locations. Mean zone parameters and shape files are available for download. The zones may be used to map, for example, underwater sound from commercial shipping within the entire Australian EEZ.
Details
- Title
- Marine acoustic zones of Australia
- Authors/Creators
- C. Erbe (Author/Creator)D. Peel (Author/Creator)J.N. Smith (Author/Creator)R.P. Schoeman (Author/Creator)
- Publication Details
- Journal of Marine Science and Engineering, Vol.9(3), Article 340
- Publisher
- MDPI
- Identifiers
- 991005541341007891
- Copyright
- © 2021 by the authors
- Murdoch Affiliation
- Centre for Sustainable Aquatic Ecosystems; Harry Butler Institute
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.796 Marine Mammal Ecology
- Web Of Science research areas
- Engineering, Marine
- Engineering, Ocean
- Oceanography
- ESI research areas
- Geosciences