Search results
Results from the WOW.Com Content Network
The four-month 1910 North Atlantic expedition headed by John Murray and Johan Hjort was the most ambitious research oceanographic and marine zoological project ever mounted until then, and led to the classic 1912 book The Depths of the Ocean. The first acoustic measurement of sea depth was made in 1914.
Murray and Hjort published their findings in The Depths of the Ocean in 1912 and it became a classic for marine naturalists and oceanographers. [ 9 ] [ 10 ] He was the first to note the existence of the Mid-Atlantic Ridge and of oceanic trenches .
The 1912 Murray and Hjort book The Depths of the Ocean quickly became a classic for marine naturalists and oceanographers. For several years, Hjort had been interested in the statistical nature and causes of the large fluctuations of fish populations.
Sounding in the Kermadec Trench between New Zealand and Tonga, they found a depth of 5,155 fathoms (9,427 m), the greatest ocean depth ever found up to that time. [8] [9] [10]: 189 They then surveyed New Georgia in the Solomon Islands, also with Penguin, and Somerville published an account of the islands and its peoples. [11]
Bathymeric charts showcase depth using a series of lines and points at equal intervals, called depth contours or isobaths (a type of contour line). A closed shape with increasingly smaller shapes inside of it can indicate an ocean trench or a seamount, or underwater mountain, depending on whether the depths increase or decrease going inward. [2]
[6] GEBCO is the only intergovernmental body with a mandate to map the whole ocean floor. At the beginning of the project, only 6 per cent of the world's ocean bottom had been surveyed to today's standards; as of June 2022, the project had recorded 23.4 per cent mapped. About 14,500,000 square kilometres (5,600,000 sq mi) of new bathymetric ...
The Kara Sea Islands section (4,000 km 2) of the Great Arctic Nature Reserve includes: the Sergei Kirov Archipelago, the Voronina Island, the Izvestiy TSIK Islands, the Arctic Institute Islands, the Svordrup Island, Uedineniya (Ensomheden) and a number of smaller islands. This section represents rather fully the natural and biological diversity ...
The relatively narrow trough trends east-northeast to west-southwest and has a maximum depth of 7,686 metres (25,217 ft). Within the trough is a slowly spreading north–south ridge which may be the result of an offset or gap of approximately 420 kilometres (260 mi) along the main fault trace.