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seasonal variability

Two people on the deck of a large ship look over the edge of the ship at large chunks of floating ice.
Posted inResearch & Developments

Arctic Winter Sea Ice Hits a Record Low, Again

by Grace van Deelen 27 March 202627 March 2026

Sea ice in the Arctic has likely hit its maximum extent for the year, the National Snow and Ice Data Center (NSIDC) said on 26 March. That maximum extent is one of the lowest ever recorded, tying last year’s record for the least sea ice coverage in the 48-year observational record.

A large group of emperor penguins huddles together on Antarctic sea ice.
Posted inNews

Shrinking Sea Ice Is Ruffling Emperor Penguins’ Feathers

by Andrew Chapman 24 March 202624 March 2026

A scientist stumbled upon evidence of penguin molting sites in satellite data, but the sea ice these birds rely on is disappearing.

An animated illustration shows a visualization of greenery moving across a simplified model of Earth with the seasons.
Posted inNews

Earth’s “Green Wave” Is on the Move

by Saugat Bolakhe 19 March 202619 March 2026

Researchers analyzed 40 years of satellite data and found that Earth’s seasonal wave of greenness is shifting northeast.

Researchers stand in a round, shoulder-high hole in the snow.
Posted inNews

When the Snow Melts, Microbes Bloom

by Rebecca Owen 4 March 20264 March 2026

A new study illuminates a complex and changing world of microbes and nitrogen cycling that occurs during the winter.

A lake, seen from a rock on the shore, is mostly covered in ice but beginning to melt. The melting water is purple. On the other side of the lake, a rocky cliffside with evergreen trees is visible beneath a blue sky.
Posted inResearch Spotlights

How the Spring Thaw Influences Arsenic Levels in Lakes

by Saima May Sidik 6 February 20266 February 2026

Four lakes near Yellowknife, Canada, show that there’s no one-size-fits-all answer.

Two people in shadow explore a dark ice cave with ice stalactites and columnar-appearing sides. Light from the entrance backlights the scene.
Posted inNews

Could Future Mars Habitats Be Made of Ice?

by Olivia Maule 15 December 202515 December 2025

Models suggest that clear ice, sourced and distilled on Mars, could offer a feasible alternative for building stable off-world structures.

Aerial view of snow-covered Yukon River Delta in Alaska.
Posted inNews

Changing Winters Leave Indigenous Alaskans on Thin Ice

by Cassidy Beach 12 December 202517 December 2025

Researchers are blending Indigenous Knowledges with climate models to describe shifts in snow and ice.

A backward C-shaped swirl of milky blues and greens appears against a deep blue background. In the foreground, toward the edges of the image, clouds appear as white patches.
Posted inResearch Spotlights

Wintertime Spike in Oceanic Iron Levels Detected near Hawaii

Sarah Stanley, Science Writer by Sarah Stanley 11 December 202511 December 2025

Seasonal rainfall and runoff of sediments from the Hawaiian Islands could be responsible for the previously undetected peak.

Daniel James instala un monitor de tasa de goteo en una estalagmita de flujo en la cueva Grutas Tzabnah en el estado de Yucatán, México, como parte de una campaña de monitoreo de cuevas.
Posted inNews

Grandes Sequias Coincidieron con el Colapso Maya Clásico

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 17 November 202517 November 2025

El entendimiento de cómo las ciudades individuales respondieron al estrés climático ayudará a crear imágenes holísticas de cómo estas sociedades funcionaban.

Aerial view of a green tractor pulling a red seeder across an large unplanted farm plot
Posted inOpinions

Scientists Must Join Forces to Solve Forecasting’s Predictability Desert

by Jadwiga H. Richter and Everette Joseph 17 October 202517 October 2025

To strengthen societal resilience to worsening natural hazards, siloed Earth system science communities must collaborate to understand conditions that favor skillful subseasonal-to-seasonal forecasts.

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