Indian Ocean News

© Alexander/Adobe Stock

July: Earth's Hottest Month Ever Recorded

degrees F above the 20th-century average of 56.9 degrees, tying with 2017 as the second-hottest year to date on record.It was the hottest year to date for parts of North and South America, Asia, Australia, New Zealand,  the southern half of Africa, portions of the western Pacific Ocean, western Indian Ocean and the Atlantic Ocean.Also, according to NOAA:-- Record-low sea ice: Average Arctic sea ice set a record low for July, 19.8% below average – surpassing the previous historic low of July 2012.-- Average Antarctic sea-ice coverage was 4.3% below the 1981-2010 average, making it the smallest

Tim Lowe (Photo: UKHO)

UK Hydrographic Office Names Chief Executive

Admiral in the Royal Navy, Lowe is also a navigation and underwater warfare specialist and has commanded both ashore (HMS COLLINGWOOD) and afloat (three Sea Commands and two Operational Commands).Other previous assignments include leading the Combined Maritime Forces counter piracy activity in the Indian Ocean (where he established the Shared Awareness and Deconfliction meeting), two assignments with NATO, and policy and operational staff appointments in the MOD, Flotilla and Fleet HQs.On assuming the role of Chief Executive and Accounting Officer Lowe will relinquish his Naval duties and responsibilities

Sonarydne’s BlueComm depressor in the water at Aldabra, during the Nekton First Descent mission. Photo: Nekton Oxford Deep Ocean Research Institute

Unheard Underwater: Covert Communications

. Nekton Foundation was set up to help change our knowledge and understanding of the world’s oceans and to speed up the protection and governance of this last great wilderness, the deep ocean. Their First Descent initiative involved a series of expeditions, using two manned submersibles, in the Indian Ocean to help explore and conserve one of our least protected spaces.A Saab Seaeye Sabertooth using BlueComm free space optical modem for wireless communications.Photo: SonardyneIn this mission, they set up a depressor (a cabled receiver from a surface vessel) with a BlueComm 200 UV on one submersible

Photo credit: S. Cerchio/Omuraswhale.org

'Elusive' Omura Whale Spotted

, and the Keeling Islands, west of Indonesia. From 2003 through 2013, their known range expanded to a few more locations in the eastern Indo-Pacific region. After the release of Dr. Cerchio’s video, the number of documented sightings increased dramatically across the world including the western Indian Ocean, eastern Atlantic off of Africa, western south Atlantic, northwestern Pacific and Oceania. The only major tropical or warm temperate oceanic basins not reporting sightings have been the eastern and central Pacific.These unevenly colored whales have filtering baleen instead of teeth and come from

Broadcasting from the deep on the Nekton First Descent mission using a BlueComm UV. (Photo: Sonardyne)

World First: Video Broadcast Live from Underwater

from an underwater submersible.Underwater technology company Sonardyne International said the international news agency Associated Press (AP) used its BlueComm wireless through-water optical modem technology to broadcast live from a two-person submersible operating in waters off the Seychelles, in the Indian Ocean. AP said that the broadcast via YouTube was “the first multi-camera live signal in full broadcast quality from manned submersibles using optical video transmission techniques, in which the pictures transmit through the waves using the electromagnetic spectrum.”The broadcast is part

HMAS Vampire (© Commonwealth of Australia 2018)

Australia Searching for Lost WWII Destroyer

owe it to the families of those on board to follow up this new lead,” Rear Admiral Mead said.He continued, “Whatever the outcome, we are most grateful to Sri Lanka for their cooperation and understanding.“The Vampire story illustrates the enduring ties we have with Sri Lanka and the Indian Ocean region.&rdquo

Yohei Sasakawa launches the operational phase of The Nippon Foundation – GEBCO Seabed 2030 project in Tokyo in February 2018. Photo: GEBCO Seabed 2030

OiA '19 & GEBCO Seabed 2030

various aspects of Seabed 2030, its connection to the UN Decade of Ocean Science for Sustainable Development and the role of industry in both.The panellists will include Dr Vicki Ferrini, Research Scientist at Columbia University’s Lamont-Doherty Earth Observatory and Head of the Atlantic and Indian Ocean Regional Centre of Seabed 2030, who will represent the Seabed 2030 Project Team and provide an overview of the project. “This will be my first Oi event,” Dr Ferrini said, “and I'm thrilled to have the opportunity to learn from attendees and make new connections. Mapping the

Walter Munk, 2017 (Photo: Erik Jepsen/UC San Diego)

Walter Munk: 1917-2019

, and heat content.The most famous example of this work might have been a Munk-led experiment to see whether acoustics could be used as a way to estimate ocean temperatures on a global scale and thus, the effects of global warming. In 1991, at a remote location near Heard Island in the southern Indian Ocean, Munk’s team transmitted low-frequency underwater acoustic signals. The location had been chosen because the sound waves could travel on direct paths to listening stations in both the Pacific and Atlantic oceans. The premise was validated as stations from Bermuda to New Zealand to the United

The Kongsberg Maritime EM 124 1x2" mapped the Puerto Rico Trench to depths greater than 8,000 meters. (Photo: Kongsberg Maritime)

Sonar Assists Deepest Solo Sub Dive

. The journey will cover 40,000 nautical miles, and by the end, the submersible will have descended through at least 72,000 meters of water.After the 8,648 meter dive to the bottom of the Puerto Rico Trench, the mission will head to the South Sandwich Trench (Southern Ocean 8,428 meters), Java Trench (Indian Ocean 7,725 meters), Mariana Trench/Challenger Deep (Pacific Ocean 10,898 meters) and Malloy Deep (Arctic Ocean 5,669 meters).Hancock said Kongsberg will remain involved with the mission throughout. "Over the next 12 months, we will continue to work together and support the expedition remotely

Fig. 1: Teledyne RDI ADCP attached to a hydrographic package before lowering to great depths. Credit: J. Lemus (U. Hawaii). https://goo.gl/VfvYn1

Full-Depth Current Profiling Around the Global Ocean

to great depth. Deep flows without shear are not evident in currents calculated from hydrographic sections. As a result, the traditional method can underestimate water volumes transported by deep-reaching currents. Addressing this issue was a common early use of LADCP data.Farther north in the Indian Ocean, impressive oceanic changes follow the onset of the southwest monsoon. A well-known reversal of strong surface currents occurs in the Somali Current. Stacked jets of currents with opposing directions are found at depth. In addition, a large intense gyre spins up off Somalia over a month&rsquo

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