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

This dataset contains backscatter homogeneity 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).

本数据集收录了帝汶海约瑟夫·波拿巴湾东部范迪门海隆的海底测绘调查所获的反向散射均匀性数据（backscatter homogeneity data）。本次调查由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）签署谅解备忘录联合开展，于2009年与2010年连续两年实施：2009年的调查编号为GA-0322（澳大利亚地质调查局）与SOL4934（澳大利亚海洋科学研究所），2010年的调查编号为GA-0325（澳大利亚地质调查局）与SOL5117（澳大利亚海洋科学研究所）。本次调查针对浅滩、水道与平原区域采集了详细的地质（沉积学、地球化学、地球物理）与生物学（大型底栖生物与底内生物多样性、群落结构）数据，旨在探究物理环境与伴生生物群之间的关联，为生物多样性预测提供科学依据。此外，本调查还为范迪门海隆的底栖生物多样性研究提供了阿拉弗拉-帝汶海及更广阔的澳大利亚北部海域的区域背景支撑。本次研究在外陆架至内陆架范围内共布设了四个研究区域。有关本次调查所采用的处理技术的详细信息，可参考澳大利亚地质调查局的官方记录《利用多波束测深、反向散射与视频数据表征海底底质：以北澳大利亚东部约瑟夫·波拿巴湾为例》（GeoCat编号：74092；GA记录编号：2013/11）。