One-fifth of Earth’s ocean floor is now mapped | BBC News


By Jonathan Amos
BBC Science Correspondent

Published

The black is where we still need modern measurements at a reasonable resolution

This leaves four-fifths – twice the area of Mars – still to be surveyed to a modern standard.

 

We’ve just become a little less ignorant about Planet Earth.

The initiative that seeks to galvanise the creation of a full map of the ocean floor says one-fifth of this task has now been completed.

When the Nippon Foundation-GEBCO Seabed 2030 Project was launched in 2017, only 6% of the global ocean bottom had been surveyed to what might be called modern standards.

 

Satellites: The shape of the sea surface traces at coarse resolution the shape of the seafloor

 

That number now stands at 19%, up from 15% in just the last year.

Some 14.5 million sq km of new bathymetric (depth) data was included in the GEBCO grid in 2019 – an area equivalent to almost twice that of Australia.

It does, however, still leave a great swathe of the planet in need of mapping to an acceptable degree.

Continue reading: One-fifth of Earth’s ocean floor is now mapped

About agogo22

Director of Manchester School of Samba at http://www.sambaman.org.uk
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