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beaches, coasts, & shorelines

Waves wash up around the base of a lifeguard tower that says “5 Torrey Pines. No lifeguard on duty.”
Posted inResearch Spotlights

Making Sense of Shallow-Water Waves with Advanced Statistics

by Matthew R. Francis 23 September 202623 September 2026

Low-frequency infragravity waves shape shorelines, but exactly how they contribute is mysterious. A technique from Bayesian probability theory might change that.

Diatom chains within glass shells shaped like toothpicks
Posted inNews

Wastewater Can Take Harmful Algal Blooms from Bad to Worse

by Lisa S. Gardiner 8 September 20268 September 2026

By modeling toxic diatoms and coastal processes, scientists have discovered the degree to which nutrients from Southern California’s densely populated coast affect these blooms.

A shoreline.
Posted inEditors' Highlights

Long-Term Datasets are Essential to Understanding Coastal Change

by Ana Vila-Concejo 26 August 202618 August 2026

A multi-decadal field dataset combined with reduced-complexity modeling approach highlights the importance of shoreline change in controlling alongshore variability of dune evolution.

Number of fatal coastal cliff failure events and fatalities globally binned per year.
Posted inThe Landslide Blog

Patterns in time and space of fatal coastal cliff failures

by Dave Petley 14 August 202614 August 2026

A new analysis (Reiss et al. 2026) explores a global database of fatal coastal cliff failures, showing that these tragic events most frequently occur in the summer months when beaches are heavily populated. One significant type of fatal landslide is coastal cliff failures. Whilst I have recorded a number of these events through the years, […]

A coastal marsh area shows water winding through an area of brown and green grasses. A boat is visible in the waterway.
Posted inResearch Spotlights

The Under-the-Radar Creeks That Are Sweeping Carbon Out of Salt Marshes

by Rebecca Dzombak 11 August 202611 August 2026

Transport via tidal creeks is a “major and often underrecognized” pathway of carbon in the coastal wetlands, and a gap in most blue carbon assessments, new research reports.

The Delaware Water Gap seen in an aerial image
Posted inResearch Spotlights

How Water Flows Toward Cities During Hurricanes

by Nathaniel Scharping 30 July 202630 July 2026

Topography is a key factor exacerbating compound flooding, while coastal wetlands help protect cities.

Diagram from the study.
Posted inEditors' Highlights

The Role of Tidal Wetlands in the Global Nitrogen Cycle Under Global Change

by Luis Lassaletta 27 July 202627 July 2026

A new study of tidal wetland data highlights their capacity to sequester nitrogen (blue nitrogen), a function that could be weakened or even reversed by wetland area loss.

A dead tree rises from a pile of rocks, concrete, and bricks heaped along a shoreline. In the background, a flagpole stands with a United States flag and a North Carolina flag outstretched in the wind beside a gray house and under overcast skies.
Posted inScience Updates

Confronting Salty Problems in the Coastal Plain

by Kiera O’Donnell, Emily S. Bernhardt, Aeran Coughlin, Ken W. Krauss and Xi Yang 6 July 20266 July 2026

An interdisciplinary network of scientists and stakeholders is working to understand how saltwater intrusion and sea level rise are affecting rural communities and to help address the consequences.

Satellite image of the Ganges River Delta.
Posted inEditors' Highlights

Shoreline Migration, Sediment Accumulation, and Blue Carbon Storage

by Eileen Hofmann 29 June 202629 June 2026

Autogenic processes of sediment storage and erosion regulate shoreline movement and therefore, where coastal wetlands develop, setting up subsurface areas of preserved organic matter, blue carbon.

A sand bar on a beach is surrounded by water on both sides. A coastline with infrastructure is seen in the distance.
Posted inResearch Spotlights

Extensive Sand Dune Loss Threatens California Coast

by Saima May Sidik 26 June 202625 June 2026

Aerial photos combined with lidar data show the extent of the problem.

Posts pagination

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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

In Alaska, Wildfires Help Prevent Future Burns. Will That Feedback Loop Hold?

24 September 202625 September 2026
Editors' Highlights

Reducing Uncertainty in Groundwater Models Using Airborne Geophysics

28 September 202625 September 2026
Editors' Vox

In Appreciation of AGU’s Outstanding Reviewers of 2025

14 September 202610 September 2026
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