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| Life thriving under the Antarctic sea ice |
Thousands of kilometres of the Arctic and Antarctic sea floors have been charted in an ambitious and highly detailed atlas of the polar seabed. Several strange shapes gouged out of the sea floor reveal some of the more dramatic periods of the poles' past.
It's often said that we know more about the surface of Mars than we do about the Earth's ocean floors. What we do know about the seabed here on Earth is perhaps at its scantiest in the remote polar regions.
An atlas being presented at a meeting of the European Geosciences Union in Vienna is set to change that. The map covers an area larger than Great Britain and is the first attempt at an in-depth atlas of the regions in 20 years.
Kelly Hogan, a marine geophysicist at the British Antarctic Survey who worked on the atlas, presented the results.
"These are the fingerprints of the way the ice shapes the sea floor at these high latitudes," Hogan told a press conference.
"We took ships out across up to high latitudes and used echo-sounding methods, where you ping down a sound pulse to the sea floor and record the response back up at the ship."
This can be used to probe surface of the sea floor as well as the sediments beneath, creating a 3D map in high resolution.
"This is remote sensing of the sea floor – in the same way satellites are moving round the globe and taking images, this is what we're doing on ships but sending pulse down to seafloor instead," Hogan said....... [READ MORE]
It's often said that we know more about the surface of Mars than we do about the Earth's ocean floors. What we do know about the seabed here on Earth is perhaps at its scantiest in the remote polar regions.
An atlas being presented at a meeting of the European Geosciences Union in Vienna is set to change that. The map covers an area larger than Great Britain and is the first attempt at an in-depth atlas of the regions in 20 years.
Kelly Hogan, a marine geophysicist at the British Antarctic Survey who worked on the atlas, presented the results.
"These are the fingerprints of the way the ice shapes the sea floor at these high latitudes," Hogan told a press conference.
"We took ships out across up to high latitudes and used echo-sounding methods, where you ping down a sound pulse to the sea floor and record the response back up at the ship."
This can be used to probe surface of the sea floor as well as the sediments beneath, creating a 3D map in high resolution.
"This is remote sensing of the sea floor – in the same way satellites are moving round the globe and taking images, this is what we're doing on ships but sending pulse down to seafloor instead," Hogan said....... [READ MORE]
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