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seafloor

A map of the world centered on the Pacific Ocean, with continents in gray and oceans in white. Lines of bright colors cross the oceans and wind around continents, depicting the locations of transoceanic subsea cables.
Posted inNews

Making Underwater Cables SMART with Sensors

by Alka Tripathy-Lang 12 December 202212 December 2022

Future cables that stretch across the ocean, transmitting cat videos and financial transactions, could also contain temperature, pressure, and seismic sensors that would allow scientists to spy on the seafloor.

People in orange work suits crouch next to small clear cylinders with brown material inside.
Posted inNews

In the Deepest Ocean Reaches, a Potent Pollutant Comes to Rest

by Sean Cummings 9 December 20229 December 2022

Surprising amounts of mercury settling into deep-sea trenches may provide a fuller picture of the metal’s path through the environment, but pulling it to the surface is no easy feat.

R/V Mirai makes its way across Arctic sea ice.
Posted inNews

The Bottom of the Arctic Is Blooming

by Fanni Daniella Szakal 14 November 202217 November 2022

Researchers found phytoplankton hidden on the Arctic seafloor, hinting at a cascade of effects on the local ecology and carbon cycle.

Maps of study region and graphs from the paper.
Posted inEditors' Highlights

Under Pressure: Recording Earthquakes at and Below the Seafloor

by Sergei Lebedev 27 October 202230 November 2022

Cabled ocean-floor observatories record ground shaking and pressure variations, which contribute to early warning systems and give us a unique view of the ocean–crust coupling.

Two maps showing locations of seismic arrays.
Posted inEditors' Highlights

Can Anelastic Attenuation of Oceanic Mantle be Reliably Measured?

by Fan-Chi Lin 26 October 202225 October 2022

A new study demonstrates that robust anelastic attenuation measurements can be made across ocean bottom seismic arrays at different locations using surface wave array analysis.

Australia’s remote Nullarbor Plain.
Posted inNews

A Mysterious Dome Reveals Clues to Australia’s Miocene History

by Nathaniel Scharping 17 October 202226 January 2023

The Nullarbor Plain has been relatively untouched by geological forces, leaving traces of the continent’s deep past.

The research vessel Nathaniel B. Palmer studies the Thwaites Glacier in 2019.
Posted inNews

Seafloor Reveals a Period of Rapid Retreat for Thwaites Glacier

by Javier Barbuzano 13 October 202225 January 2023

New high-resolution seafloor imagery shows a series of delicate ridges produced by the glacier’s front as it bobbed daily with the tides, revealing a recent period of rapid retreat.New high-resolution seafloor imagery shows a series of delicate ridges produced by the glacier’s front as it bobbed daily with the tides, revealing a recent period of rapid retreat.

Posted inEditors' Highlights

A Really Big (Global) Splash at Chicxulub

by Tom Parsons 12 October 202213 October 2022

What caused a tsunami 30,000 times more powerful than the December 26, 2004 Indian Ocean tsunami? A new modeling study says this was one of the results from the Cretaceous Chicxulub asteroid impact.

Satellite photo of a massive ice shelf with a couple of large cracks
Posted inResearch Spotlights

Melting Below the Pine Island Ice Shelf Minds the Gap

by Sarah Derouin 3 October 20223 October 2022

New research shows that increased calving from West Antarctica’s Pine Island Ice Shelf will likely drive increased circulation of warm water—and melting—below the ice.

Aerial view of a muddy river delta with meandering stream channels emanating from a river emerging from a forest
Posted inResearch Spotlights

When Projecting Coastal Resilience, Sediment Compaction Is Key

by Morgan Rehnberg 30 September 202230 September 2022

The addition of new sediment helps build up lowland environments like deltas and marshes, but it also compacts materials beneath it—a vital, but often overlooked, factor in landscape evolution studies.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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