Project aims to map entire ocean floor by 2030
Thomson Reuters Foundation
FOR experts in the field of ocean mapping it is no small irony that we know more about the surfaces of the Moon and Mars than we do about our planet’s sea floor.
“Can you imagine operating on the land without a map, or doing anything without a map?” asked Larry Mayer, director of the US-based Center for Coastal and Ocean Mapping, a research body that trains hydrographers and develops tools for mapping.
“We depend on having that knowledge of what’s around us – and the same is true for the ocean,” he said.
With their deep craters and mountain ranges, the contours of the earth beneath the waves are both vast and largely unknown.
But a huge mapping effort is under way to change that.
The UN-backed project, called Seabed 2030, is urging countries and companies to pool data to create a map of the entire ocean floor by 2030. The map will be freely available to all.
“We obviously need a lot of co-operation from different parties – individuals as well as private companies,” said Mao Hasebe, project coordinator at the Nippon Foundation, a Japanese philanthropic organisation supporting the initiative.
“We think it’s ambitious, but we don’t think it’s impossible,” Hasebe said.
The project, which launched in 2017, is expected to cost about $3 billion (R42bn). It is a collaboration between the Nippon Foundation and Gebco, a non-profit association of experts, which is already involved in charting the ocean floor.
The end result would be greater knowledge of the oceans’ biodiversity, improved understanding of the climate, advanced warning of impending disasters, and the ability to better protect or exploit deep-sea resources, said Hasebe.
So far, the biggest data contributors to Seabed 2030 have been companies – in particular Dutch energy prospector Fugro and deep-sea mapping firm Ocean Infinity. Both were involved in the search for the Malaysian airliner MH370, which disappeared in 2014.
But mapping the oceans goes back much further, said Mayer – to 1903, when Prince Albert I of Monaco was the first to do it comprehensively. The rudimentary method involved tossing overboard a “hunk of lead at the end of a rope” to plumb the depths.
Technology evolved after World War II to using echo sound reflections, but that produced only a “blurry picture”, said Mayer. Today, high-tech multibeam echo sounders transmit a fan of acoustic beams from a ship, which ping back depending on the depth and topography of the ocean floor. That creates data points, which can be converted into a map.
“With advanced sonar technology it really is like seeing. I think we’ve come out of the era of being the blind man with the stick,” said Robert Larter, a marine geophysicist at the British Antarctic Survey.
“We can survey much more efficiently – and, not only that, but in much greater detail,” he said, adding that the work was painstaking. “The ocean’s a big place!” he said. The advent of new technology such as underwater drones and robots is also speeding up the mapping process.
A global competition hosted by energy giant Shell – the Shell Ocean Discovery Xprize – is also under way, offering $7 million to teams that can develop technologies to conduct ocean exploration autonomously, rapidly and to a high resolution.
A team from Seabed 2030 has reached the final stages of the competition with an idea based on remotely operated robots working in extreme depths to map territory independently.
Exploring Earth’s final frontier will do more than satisfy scientific curiosity – it should bring economic benefits too.
More than 90% of the world’s trade is carried by sea, according to the International Maritime Organisation, a UN body, making safe navigation a key motivator for mapping.
“If a ship runs aground it’s a terrible day for the economy, it’s a terrible day for the environment and it’s a bad day for the captain too,” said Mayer.
Seabed 2030’s map would have other benefits, experts said – in a warming world it would provide a better idea of sea levels as ice melts and, importantly, warn about impending tsunamis that could devastate coastal communities.
They said it would also help the so-called “blue economy” as countries and companies seek to protect or exploit deep-sea resources – from exploring for oil and gas to installing wind farms or laying fibre-optic cables for the internet.
That is predicted to become more important in the coming years, according to the Organisation for Economic Co-operation and Development. It expects the ocean economy to contribute $3 trillion to the world economy by 2030, up from $1.5 trillion in 2010.
Some parts of the oceans – the east coast of the US, areas around Japan, New Zealand and Ireland – are relatively well mapped, experts said. Others, including the West African coast or the Caribbean, remain largely blank.
The introduction of the 1982 United Nations Convention on the Law of the Sea, an international treaty, allowed countries to determine their continental shelves and exclusive economic zones – legitimate territorial claims off their coasts.
It also spurred a rush to map and claim land, said Larter.
“That’s the biggest land grab in recent history,” he said.
For Julian Barbiere of Unesco’s Intergovernmental Oceanographic Commission, it would be a “paradox” if, after collaboration at a scientific and technical level to share data, countries used that knowledge against each other in geopolitical spats.
“There are already tensions in some parts of the world, and one of the reasons for that is access to resources,” he said. Some countries, he added, are reluctant to give up strategic proprietary data to the Seabed 2030 project, largely due to national security concerns.