Methodologies for multibeam seabed hardness mapping in the Timor Sea - Backscatter Grids

This dataset contains multibeam sonar backscatter data from seabed mapping surveys on the Van Diemen Rise in the eastern Joseph Bonaparte Gulf of the Timor Sea. The survey was conducted under a Memorandum of Understanding between Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS) in two consecutive years 2009 (GA survey number GA-0322 and AIMS survey number SOL4934) and 2010 (GA survey number GA-0325 and AIMS survey number SOL5117). The surveys obtained detailed geological (sedimentological, geochemical, geophysical) and biological data (macro-benthic and infaunal diversity, community structure) for the banks, channels and plains to investigate relationships between the physical environment and associated biota for biodiversity prediction. The surveys also provide Arafura-Timor Sea, and wider northern Australian marine region context for the benthic biodiversity of the Van Diemen Rise. Four study areas were investigated across the outer to inner shelf. Refer to the GA record 'Methodologies for seabed substrate characterisation using multibeam bathymetry, backscatter, and video data: A case study for the Eastern Joseph Bonaparte Gulf, Northern Australia' for further information on processing techniques applied (GeoCat: 74092; GA Record: 2013/11).\n\nYou can also purchase hard copies of Geoscience Australia data and other products at http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html

本数据集包含帝汶海约瑟夫·波拿巴湾东部范迪门海隆海底测绘勘测的多波束声纳背散射数据（multibeam sonar backscatter data）。本次勘测依据澳大利亚地质调查局（Geoscience Australia, GA）与澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）签订的谅解备忘录，于2009年（GA勘测编号GA-0322，AIMS勘测编号SOL4934）及2010年（GA勘测编号GA-0325，AIMS勘测编号SOL5117）连续两年实施。勘测获取了海床、水道与平原的详细地质（沉积学、地球化学、地球物理）与生物数据（大型底栖生物及底内生物多样性、群落结构），旨在探究物理环境与相关生物群之间的关联，为生物多样性预测提供支撑。本次勘测同时为范迪门海隆的底栖生物多样性提供了阿拉弗拉-帝汶海乃至更广范围的北澳大利亚海洋区域背景。研究团队在外陆架至内陆架范围内共设置了四个研究区域。有关本次勘测采用的处理技术的详细信息，请参阅澳大利亚地质调查局发布的报告《利用多波束水深测量、背散射与视频数据表征海底底质：以北澳大利亚东约瑟夫·波拿巴湾为例》（GeoCat编号：74092；GA记录编号：2013/11）。

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