Coral spawn and bathymetric slicks in Synthetic Aperture Radar (SAR) data from the Timor Sea, north‐west Australia

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Abstract:

Annular‐ to crescent‐shaped low backscatter SAR slicks over carbonate reefs and shoals in the Timor Sea that exhibit ‘feathering', and within the coral spawning period for the region, are interpreted to be caused by a coral spawn event. This represents the first time that such an event has been interpreted through satellite remote sensing. Additionally, ocean current data and detailed swath bathymetry of the sea floor to the south‐east of the coral spawn slicks suggest that elongate repeating slicks in this area are related to current flow over submarine channels. Assessment of these slicks in association with ancillary data, such as bathymetry, current velocities, weather, and timing of SAR acquisition allow a more robust interpretation of their origins. Through differentiating coral spawn and bathymetric slicks from oil and other biological slicks in shallow carbonate systems, such as the Timor Sea, petroleum and environmental assessments for these areas can be improved.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01431160500445308

Affiliations: 1: Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia 2: NPA Group, Crockham Park, Edenbridge, Kent, TN8 6SR, UK 3: TREICo Ltd., Arches House, 46 Pondcroft Road, Knebworth, Herts, SG3 6DB, UK

Publication date: May 1, 2006

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