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beaches, coasts, & shorelines

Deformed buildings, beached boats, and debris litter a coastline in Japan.
Posted inNews

What Controls Giant Subduction Earthquakes?

by P. Waldron 15 October 202016 March 2022

Subduction zones with a low dipping angle and thick sediments can produce giant earthquakes; this finding lets researchers estimate worst-case scenarios for coastlines around the world.

An artist’s depiction of early modern humans living amid the grasslands of the Paleo-Agulhas Plain
Posted inFeatures

A Lost Haven for Early Modern Humans

by K. Braun 14 October 202024 January 2024

Sea level changes have repeatedly reshaped the Paleo-Agulhas Plain, a now submerged region off the coast of South Africa that once teemed with plants, animals, and human hunter–gatherers.

Large rock balanced on cliffside
Posted inEditors' Highlights

Earthquake Hazard Hanging in the Balance

by T. Parsons 1 October 202011 February 2022

Earthquake hazard calculations for California’s coast are refined with a view of precariously balanced rocks that would have fallen if the largest predicted shaking happened in the past 20,000 years.

Aerial photo of brown seaweed lining an entire stretch of a beach in Barbados
Posted inNews

Saint Lucia Works to Release Itself from Sargassum’s Stranglehold

by Sarah Peter 25 September 20204 January 2024

Nearly 10 years ago, Caribbean beaches experienced a sudden onslaught of Sargassum. Today residents continue to explore ways to mitigate the seaweed’s damage to local health and livelihoods.

The Huanza hydroelectric dam near Lima, Peru
Posted inResearch Spotlights

Dams Alter Nutrient Flows to Coasts

Elizabeth Thompson by Elizabeth Thompson 15 September 202022 December 2021

New models indicate how dams worldwide influence the mix of nutrients in river water reaching the ocean. As more dams are built, changing nutrient loads may adversely affect coastal ecosystems.

Grass and trees in a subtropical swamp on North Stradbroke Island, Queensland, Australia
Posted inResearch Spotlights

Ideal Temperatures for Carbon Uptake by Subtropical Plants

Elizabeth Thompson by Elizabeth Thompson 26 August 202010 February 2022

Air temperatures in coastal ecosystems of Australia routinely exceed the optimum range for photosynthesis, hindering plants’ ability to take up atmospheric carbon.

Photograph of the Thames flood barrier in London
Posted inEditors' Vox

The Ups and Downs of Tides

by J. A. M. Green, I. D. Haigh and M. D. Pickering 13 August 202016 March 2023

The size of tides has changed in the past and will continue to change in the future due to natural and anthropogenic influences on estuaries, coastlines, and near shore regions.

Shoreline view in an estuary in northeastern New Zealand
Posted inResearch Spotlights

Estuary Research Suffers from Scientific Bias

Kate Wheeling, freelance science writer by Kate Wheeling 17 July 202010 February 2022

Researchers are calling for a closer look at nutrient cycling in tropical and low-nutrient estuaries, which have long been overlooked in the scientific literature.

Funafuti atoll, in Tuvalu
Posted inNews

A Brighter Future for Coral Reef Islands

Hannah Thomasy, Science Writer by Hannah Thomasy 15 July 20203 November 2021

Although some islands demonstrate more resiliency than previously thought, island communities may require significant flood-resistant infrastructure to maintain their way of life.

A view along the Atlantic coastline of South Africa showing hillslopes descending to the beach and ocean
Posted inResearch Spotlights

Ancient Sea Levels in South Africa May Offer Modern Analogues

Aaron Sidder, freelance science writer by Aaron Sidder 14 July 202026 January 2023

Largely spared from disruptive tectonic activity, the South African coastline offers a natural setting to study sea levels from when Earth’s atmospheric carbon dioxide last reached today’s levels.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

As Wildfires Increase in the West, So Does Suppression Spending

10 June 202610 June 2026
Editors' Highlights

Multi-Scale Fault Roughness Encapsulated in a Friction Law

11 June 202611 June 2026
Editors' Vox

Small-Scale Indian Ocean Dynamics Underpin Marine Ecology and Climate

4 June 20263 June 2026
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