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High-resolution multibeam sonar bathymetry of the deepest place in each ocean
Geoscience Data Journal ( IF 3.3 ) Pub Date : 2021-05-05 , DOI: 10.1002/gdj3.122
Cassandra Bongiovanni 1 , Heather A. Stewart 2 , Alan J. Jamieson 3
Affiliation  

Over the course of 10 months, the global Five Deeps Expedition (2018–2019) mapped ~550,000 km2 of seafloor of which 61% comprised new coverage over areas never before surveyed and ~30% was acquired from some of the ocean's deepest trenches and fracture zones. The deepest points of each ocean were mapped using a latest-generation, full-ocean depth Kongsberg EM 124 multibeam echosounder. These extreme depths were corrected using Conductivity, Temperature and Depth (CTD) data from sea surface to full ocean depth. The deepest place in each ocean were identified as the Brownson Deep, Puerto Rico Trench in the Atlantic Ocean (8,378 ± 5 m), an unnamed deep within the South Sandwich Trench in the Southern Ocean (7,432 ± 13 m), an unnamed deep within the Java Trench in the Indian Ocean (7,187 ± 13 m), Challenger Deep within the Mariana Trench in the Pacific Ocean (10,924 ± 15 m), and the Molloy Hole in the Arctic Ocean (5,551 ± 14 m). As part of the overarching mission of the Five Deeps Expedition, and to clarify beyond doubt the deepest point in the Indian, Pacific and Southern oceans, other sites were visited that had been postulated as potential deepest locations. This study has confirmed that the Horizon Deep within the Tonga Trench is the second deepest point in the Pacific Ocean (10,816 ± 16 m), the Dordrecht Deep within the Diamantina Fracture Zone is not the deepest point in the Indian Ocean (7,019 ± 17 m) and that in accordance with the guidelines of the Antarctic Treaty and International Hydrographic Organisation, although the Meteor Deep is the deepest point in the South Sandwich Trench (8,265 ± 13 m) it is located within the waters of the Atlantic Ocean and not the Southern Ocean.

中文翻译:

每个海洋最深处的高分辨率多波束声纳测深

在 10 个月的时间里,全球五次深海探险(2018-2019 年)绘制了约 550,000 km 2的海底,其中 61% 是对以前从未调查过的区域的新覆盖,约 30% 是从一些海洋最深的海沟和断裂带。使用最新一代全海洋深度 Kongsberg EM 124 多波束回声测深仪绘制了每个海洋的最深点。这些极端深度使用从海面到整个海洋深度的电导率、温度和深度 (CTD) 数据进行了校正。每个海洋中最深的地方被确定为布朗森深, 大西洋波多黎各海沟 (8,378 ± 5 m), 南大洋 South Sandwich Trench (7,432 ± 13 m) 内的一个无名深海, 印度洋爪哇海沟内的一个无名深海 (7,187 ± 13 m) )、太平洋马里亚纳海沟深处的挑战者(10,924 ± 15 m) 和北冰洋的莫洛伊洞(5,551 ± 14 m)。作为五个深海探险的总体任务的一部分,为了毫无疑问地弄清印度洋、太平洋和南大洋的最深点,我们访问了其他被假定为潜在最深点的地点。这项研究证实,汤加海沟内的地平线深处是太平洋第二深点(10,816 ± 16 m),即多德雷赫特深海尽管流星深处是南桑威奇海沟的最深点,但根据南极条约和国际水文组织的指导方针,迪亚曼蒂纳断裂带内不是印度洋的最深点(7,019 ± 17 m) ( 8,265 ± 13 m) 它位于大西洋水域,而不是南大洋。
更新日期:2021-05-05
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