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Southern Ocean

A glacier in blue water
Posted inNews

El Niño May Have Kicked Off Thwaites Glacier Retreat

by Grace van Deelen 26 February 202428 February 2024

Antarctica’s “Doomsday Glacier” started losing mass midcentury, around the same time as its neighboring glacier.

An iceberg floats in the ocean near Antarctica.
Posted inNews

Antarctica’s Ocean Acidity Set to Rise Rapidly by Century’s End

by Nathaniel Scharping 9 February 202411 March 2024

New research shows acidity levels could as much as double by 2100, imperiling fragile ecosystems in the frigid Southern Ocean.

Model from the study.
Posted inEditors' Highlights

Overturning Ocean Water by Turbulence

by Nicolas Gruber 11 January 20248 January 2024

A high-resolution regional model of the Southern Ocean reveals how topographically induced mixing in the abyss is important in creating the water masses that can upwell back up to the surface.

Scattered pieces of ice float in an icy sea. Snowy mountains and a cloudy sky are seen in the distance.
Posted inResearch Spotlights

Seawater Dynamics in an Underexplored Antarctic Fjord

Sarah Stanley, Science Writer by Sarah Stanley 3 January 20243 January 2024

Wind is the major driver of salinity changes within the narrow, glacier-fed cove.

An emperor penguin is standing on a sheet of ice with a row of other penguins sliding on their bellies.
Posted inEditors' Vox

Landfast Sea Ice: The Most Important Ice You’ve Never Heard Of

by Pat Wongpan and Alexander D. Fraser 22 August 202321 August 2023

Landfast sea ice, sea ice that is held stationary against the Antarctic continent, links firmly with many key climate processes, but its importance is only being fully realized as its extent dwindles.

A photo taken from a red ship next to waters with abundant sea ice
Posted inNews

Meltwater from Antarctic Glaciers Is Slowing Deep-Ocean Currents

by Veronika Meduna 26 July 202326 July 2023

Antarctic ice drives crucial deep-ocean currents that help regulate Earth’s climate. But the system is slowing down.

A group of penguins stand on ground streaked with yellow-white droppings. The sea is in the background.
Posted inNews

Penguin Poop May Flush Iron into the Southern Ocean

by Carolyn Wilke 23 May 202323 May 2023

Nutrients from the seabirds’ guano fuels the growth of carbon-storing phytoplankton, but penguin populations have plunged in the past 4 decades.

Satellite image showing black water next to white ice with cracks
Posted inNews

Supercharged El Niño Could Speed Up Southern Ocean Warming

by Erin Martin-Jones 24 March 202324 April 2023

Projected changes to El Niño will likely accelerate warming of the deep oceans around the Antarctic, supplying heat that could drive ice loss and sea level rise.

Black hills covered in snow in front of a deep blue sea and tall white mountains.
Posted inResearch Spotlights

A Deeper Dive into Wintry, Carbon-Absorbing Antarctic Waters

Aaron Sidder, freelance science writer by Aaron Sidder 8 March 20238 March 2023

Cold surface water in the Southern Ocean is a critical component in ocean carbon uptake. A new study profiles it using state-of-the-art research techniques.

Researcher Liezel Rudolph stands next to an unmarked signpost on Marion Island.
Posted inNews

Geospatial Database for the Prince Edward Islands

by Munyaradzi Makoni 9 November 202217 November 2022

South African scientists map uninhabited islands in the Southern Ocean.

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Where Do Antarctic Submarine Canyons Get Their Marine Life?

18 June 202518 June 2025
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Coupled Isotopes Reveal Sedimentary Sources of Rare Metal Granites

17 June 202516 June 2025
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Inside Volcanic Clouds: Where Tephra Goes and Why It Matters

16 June 202512 June 2025
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