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sea ice

Hielo marino agrietado visto desde arriba.
Posted inNews

La salinidad del Océano Austral podría estar desencadenando la pérdida de hielo marino

by Bill Morris 9 October 20259 October 2025

Nuevas tecnologías satelitales han revelado que el Océano Austral se está volviendo más salino, un giro inesperado de los eventos que podría representar un gran problema para la Antártida.

An aerial photo of a research team standing on ice with a research vessel looming in the background.
Posted inNews

Ice Diatoms Glide at Record-Low Temperatures

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 7 October 20257 October 2025

New observations reveal how microscopic organisms move through polar ice and illustrate how they may have evolved to thrive in extreme environments.

A large iceberg floats in blue Arctic Ocean water.
Posted inNews

Arctic Ice Shelf Theory Challenged by Ancient Algae

by Andrew Chapman 13 August 202513 August 2025

Chemical signatures of marine organisms reveal that seasonal sea ice, not a massive ice shelf, persisted in the southern Arctic Ocean for 750,000 years.

Cracked sea ice seen from above
Posted inNews

Southern Ocean Salinity May Be Triggering Sea Ice Loss

by Bill Morris 29 July 20259 October 2025

New satellite technology has revealed that the Southern Ocean is getting saltier, an unexpected turn of events that could spell big trouble for Antarctica.

Historic black-and-white photo of a humpback whale diving, flukes visible above the surface
Posted inNews

Whaling Records Can Help Improve Estimates of Sea Ice Extent

by Syris Valentine 15 July 202515 July 2025

The locations of humpback whale catches in the early 20th century indicate that most climate models overestimate the historic extent of sea ice in the Southern Ocean.

Close-up view of pieces of sea ice separated by a strip of open water.
Posted inScience Updates

Finding Consensus on Arctic Ocean Climate History

by Jochen Knies, Matt O’Regan and Claude Hillaire Marcel 25 June 202525 June 2025

Understanding the effects of a “blue” Arctic Ocean on future climate requires a coordinated effort to study Earth’s past warm periods using a variety of classical and cutting-edge methods.

A satellite image of a river flowing into the ocean. The area where it meets the ocean is cloudy.
Posted inResearch Spotlights

The Uncertain Fate of the Beaufort Gyre

by Saima May Sidik 13 May 202513 May 2025

Climate models produce widely varying predictions for what will happen to this influential ocean current, but most models predict it will weaken or stop.

Posted inEditors' Highlights

二氧化碳恢复后的北极海冰:对北大西洋天气的影响

by Gudrun Magnusdottir 24 April 202524 April 2025

北极海冰恢复不完全导致冬季急流向赤道偏移。由于海洋环流起到了额外的驱动作用,北大西洋急流的偏移尤其不确定。

Graphs and maps from the study.
Posted inEditors' Highlights

Arctic Sea Ice After CO2 Recovery: Implications for North Atlantic Weather

by Gudrun Magnusdottir 4 April 202524 April 2025

Incomplete Arctic sea ice recovery results in equatorward-shifted winter jets. The North Atlantic jet shift is particularly uncertain due to the ocean circulation acting as an additional driver.

View from afar of a blue and white research vessel next to an iceberg.
Posted inNews

Thriving Antarctic Ecosystem Revealed by a Departing Iceberg

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 31 March 202523 June 2025

A quick-calving iceberg gave scientists a rare glimpse into what hides beneath Antarctic ice.

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Features from AGU Publications

Research Spotlights

How Algae Helped Some Life Outlast Extinction

13 November 202513 November 2025
Editors' Highlights

Taking Carbon Science Out of Orbit

12 November 202512 November 2025
Editors' Vox

Announcing New AGU Journal Editors-in-Chief Starting in 2026

12 November 202513 November 2025
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