Backscatter grids of Carnarvon Shelf

Geoscience Australia carried out a marine survey on Carnarvon shelf (WA) in 2008 (SOL4769) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wavegenerated currents. Data and samples were acquired using the Australian Institute of Marine Science (AIMS) Research Vessel Solander. Bathymetric mapping, sampling and video transects were completed in three survey areas that extended seaward from Ningaloo Reef to the shelf edge, including: Mandu Creek (80 sq km); Point Cloates (281 sq km), and; Gnaraloo (321 sq km). Additional bathymetric mapping (but no sampling or video) was completed between Mandu creek and Point Cloates, covering 277 sq km and north of Mandu Creek, covering 79 sq km. Two oceanographic moorings were deployed in the Point Cloates survey area. The survey also mapped and sampled an area to the northeast of the Muiron Islands covering 52 sq km..

The dataset contains 5 backscatter grids of the Carnarvon Shelf area produced from the processed EM3002 backscatter data of the survey area using the CMST-GA MB Process. Please see the metadata for more information.

澳大利亚地质调查局（Geoscience Australia）于2008年在西澳大利亚州（WA）的卡那封陆架（Carnarvon shelf）开展了编号为SOL4769的海洋调查，旨在通过同步采集表层沉积物与底内生物样品、采用水下拖曳式视频及静态摄影观测底栖生境、测量海洋潮汐与波浪生成流，完成海底水深地形制图并表征底栖环境。本次调查依托澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）的“索兰德号”研究船采集数据与样品。

水深测绘、样品采集与视频断面调查共覆盖三个从宁格罗礁向陆架边缘向海延伸的海域，分别为：曼杜溪（面积80平方千米）、克洛特斯角（面积281平方千米）以及纳拉鲁（面积321平方千米）。此外，调查还在曼杜溪与克洛特斯角之间（覆盖277平方千米）及曼杜溪以北（覆盖79平方千米）区域开展了额外的水深测绘工作，未进行样品采集与视频观测。在克洛特斯角调查海域内，共部署了2套海洋观测锚系。本次调查还对穆伊隆群岛东北部面积为52平方千米的海域开展了测绘与采样工作。

本数据集包含5套卡那封陆架区域的反向散射网格数据，该数据由本次调查获取的EM3002反向散射数据经CMST-GA MB Process处理生成。更多详细信息请参阅元数据（metadata）。