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coral reefs

An outcropping of coral on Australia’s Great Barrier Reef. The coral has various textures and is pink, purple, and red in tone.
Posted inResearch Spotlights

Metals Could Reveal Corals’ Past Lives

by Nathaniel Scharping 6 February 20246 February 2024

Examining the role of stable metal isotopes in biological activities such as photosynthesis provides a promising new avenue of research into how coral responds to environmental stressors.

Yellow corals in a variety of branching shapes appear against a background of light blue water.
Posted inResearch Spotlights

Shallow Seawater Chemistry May Make Reefs More Resistant to Ocean Acidification

Sarah Stanley, Science Writer by Sarah Stanley 29 January 202418 March 2024

Research from the Florida Keys reveals geographic and seasonal variation in the effects of acidification on corals.

Seagrass stretches toward the sunlight at Lassing Park in St. Petersburg, Fla.
Posted inAGU News

A Closer Look-Sea at the Ocean’s Carbon Cycle

by Caryl-Sue Micalizio 25 January 202425 January 2024

In the February issue of Eos, we dive deep to better understand opportunities, challenges, and ongoing mysteries posed by carbon’s role in marine environments.

Carbonate gravels up to boulder size (with human scale) are scattered on the seaward side of the island. Mangroves were planted and propagated.
Posted inNews

A Philippine Island Detective Story

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 11 December 202311 December 2023

Researchers snorkeled, drilled, profiled, mapped, and interviewed to unlock clues to how an island was born.

A boxy remotely operated vehicle is lowered by crew in yellow hard hats into the ocean off CCGS Amundsen.
Posted inNews

Local Fishers Help Uncover Coral Clinging to Underwater Cliffs

by Andrew Chapman 6 December 20236 December 2023

Their knowledge led to more accurate seafloor maps and a hidden trove of biodiversity in the Labrador Sea.

Une image sous-marine montre un scientifique plongeur forant dans un grand dôme de corail
Posted inResearch Spotlights

La chimie du corail reflète l’expansion économique d’Asie du Sud-Est

by Rebecca Dzombak 22 August 202322 August 2023

Les sols en érosion en raison du développement économique ont transporté des sédiments en mer de Chine méridionale… et jusque dans le squelette corallien.

Una imagen subacuática que muestra a un científico con traje de buzo sobre un coral extrayendo un núcleo de este.
Posted inResearch Spotlights

La química de los corales refleja la expansión económica del sudeste asiático

by Rebecca Dzombak 14 June 20235 July 2023

La erosión del suelo derivada del desarrollo económico mueve sedimentos hacia el mar del sur de China y también hacia los esqueletos de los corales.

这张水下照片展示了一位正在潜水的科学家在钻探一块巨大的白色珊瑚的顶部。
Posted inResearch Spotlights

珊瑚反映东南亚的经济增长

by Rebecca Dzombak 31 May 20231 June 2023

经济发展造成的土壤侵蚀将沉积物送入南中国海,并进入珊瑚骨架。

An underwater image shows a diving scientist drilling into a large, white dome of coral.
Posted inResearch Spotlights

Coral Chemistry Reflects Southeast Asia’s Economic Expansion

by Rebecca Dzombak 11 May 202322 August 2023

Soil erosion from economic development sent sediments into the South China Sea—and into coral skeletons.

A chunk of coastal permafrost has toppled into the sea along Alaska’s northernmost shores.
Posted inEditors' Vox

What We Know and Don’t Know About Climate Tipping Elements

by Seaver Wang 12 April 202311 April 2023

As climate change continues, parts of the Earth system such as ice sheets, frozen soils, or the Amazon rainforest could shift—some quickly, some slowly—after crossing key thresholds or tipping points.

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A view of a bridge, with the New Orleans skyline visible in the distance between the bridge and the water. A purple tint, a teal curved line representing a river, and the text “#AGU25 coverage from Eos” overlie the photo.

Features from AGU Publications

Research Spotlights

Denitrification Looks Different in Rivers Versus Streams

16 January 202616 January 2026
Editors' Highlights

Coastal Coralline Algae Naturally Survive Persistent, Extreme Low pH

22 January 202622 January 2026
Editors' Vox

Bridging the Gap: Transforming Reliable Climate Data into Climate Policy

16 January 202616 January 2026
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