Southern Great Barrier Reef Shelf Bathymetry survey (FK201122/GA4867)

This resource includes bathymetry data acquired during the Southern Depths of the Great Barrier Reef survey using Kongsberg EM302 and EM710 multibeam sonar systems.
The Southern Great Barrier Reef Shelf Bathymetry survey (FK201122/GA4867); also known as Ice Age Geology of the Great Barrier Reef survey; was led by Queensland University of Technology aboard the Schmidt Ocean Institute's research vessel Falkor from the 22nd of November to the 21st of December 2020.
The primary objective of the expedition was to explore ancient undersea features that formed during the last Ice Age, when sea level was around 125 m lower than it is today. While once an exposed part of the Australian coast, these shelf areas were submerged as Earth’s glaciers and ice sheets melted and sea level rose, flooding Australia’s continental shelf.
Another objective was to find the southern extent of an older limestone platform that may represent the approximately 20 million-year-old base upon which the present Great Barrier Reef has grown.
This V1 dataset contains two 64m resolution 32-bit floating point geotiff files of the Southern Great Barrier Reef Shelf Bathymetry survey area, derived from the processed EM302 and EM710 bathymetry data, using CARIS HIPS and SIPS software.
This dataset is not to be used for navigational purposes.
This dataset is published with the permission of the CEO, Geoscience Australia.

本数据集包含于大堡礁南部海域勘测期间，采用康士伯（Kongsberg）EM302与EM710多波束声呐系统采集的海底测深数据。
本次大堡礁南部陆架海底测深勘测（Southern Great Barrier Reef Shelf Bathymetry survey，编号FK201122/GA4867），亦被称为“大堡礁冰河时期地质勘测”，由昆士兰科技大学主导，于2020年11月22日至12月21日期间，搭乘施密特海洋研究所的科考船“法尔科”号（Falkor）开展。
本次科考的首要目标是探索末次冰期形成的古海底地貌——彼时全球海平面较现今低约125米，这些陆架区域曾是澳大利亚沿岸的裸露陆地，后随着地球冰川与冰盖消融、海平面上升，澳大利亚大陆架被海水淹没，这些区域也随之沉入水下。
另一项科考目标是探明一处古老石灰岩台地的南部边界，该台地或为现今大堡礁赖以发育的、约2000万年历史的基底。
本V1版本数据集包含两份分辨率为64米的32位浮点型地理标记影像文件（GeoTIFF），覆盖大堡礁南部陆架海底测深勘测区域，数据源自经CARIS HIPS与SIPS软件处理后的EM302及EM710海底测深数据。
本数据集不得用于航海导航用途。
本数据集经澳大利亚地质科学局（Geoscience Australia）首席执行官许可后发布。