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erosion & weathering

A black-and-white photograph of a river.
Posted inNews

What a Gold Mining Mishap Taught Us About Rivers

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 13 January 202227 March 2023

Miners in Alaska rerouted a river to search for gold. One hundred years later, the new channel is teaching scientists how rivers shape Earth.

Ice breakup along the southwestern shores of Illinois Beach State Park on Lake Michigan
Posted inNews

Drones and Crowdsourced Science Aid Great Lakes Data Collection

by Iris Crawford 17 December 202111 January 2022

Important data collection can aid coastal monitoring and management.

An uprooted tree after an extreme weather event
Posted inResearch Spotlights

New Theory Connects Tree Uprooting and Sediment Movement

Aaron Sidder, freelance science writer by Aaron Sidder 19 November 202125 March 2022

Tree throw from extreme wind events plays an important role in the movement of sediment and erosion on forested hillslopes. A new theory offers a novel way to measure its impact.

On the left is a schematic illustrating the model setup in an idealized rectangular channel. On the right is a contour plot of predicted ratio of lateral erosion rate to vertical erosion rate as a function of transport stage and relative sediment supply.
Posted inEditors' Highlights

Impacts by Moving Gravel Cause River Channels to Widen or Narrow

by Mikaël Attal 24 September 202115 February 2023

A new analytical model describes how the amount and grain size of sediment transported by rivers influences bedrock channel width, which can be used to predict where rivers will widen or narrow.

Posted inEditors' Highlights

Himalayan Tectonics in the Driver’s Seat, Not Climate?

by Peter Zeitler 15 September 20213 May 2022

Earth’s oscillating climate is a natural guess to explain cyclic patterns in erosion, but new sediment data suggests that cyclicity may emerge from tectonic processes adding material to the Himalaya.

The 9-kilometer-tall volcano Maat Mons, shown here with an exaggerated vertical scale, may be relatively young.
Posted inResearch Spotlights

Is Venus Volcanically Active? New Approach Could Provide an Answer

Sarah Stanley, Science Writer by Sarah Stanley 15 September 20218 February 2022

A strategy that combines geologic mapping with data on how the planet’s surface emits and absorbs microwave radiation could potentially identify recent lava flows.

Long, nearly straight lines of sand ridges on Mars
Posted inNews

Megaripples on Mars—How to Name Wind-Shaped Features on the Red Planet

Nola Taylor Redd, Science Writer by Nola Taylor Tillman 30 August 202114 April 2022

New research suggests a more settled terminology for Martian aeolian landforms based on size and geomorphology.

Viendo hacia afuera desde el Canion del Antílope Inferior, con el cielo cerca de la parte superior de la foto. La laminación característica de la arenisca es visible.
Posted inResearch Spotlights

La primera mirada de la meteorización a escala angstrom

Kate Wheeling, freelance science writer by Kate Wheeling 19 August 202124 February 2022

Investigadores observan cómo el vapor de agua y el líquido alteran las rocas sedimentarias a través de procesos físicos y químicos.

Image of dark linear features on the surface of Mars known as recurring slope lineae
Posted inEditors' Highlights

After the Dust Cleared: New Clue on Mars’ Recurring Slope Lineae

by A. Deanne Rogers 8 April 20212 February 2022

An imaging campaign after the 2018 planet-encircling dust storm on Mars revealed a significant increase in detections of enigmatic recurring slope lineae and new insights into how they might form.

硅藻进化到用镉来替代锌
Posted inResearch Spotlights

硅藻是如何进化到利用有毒金属镉代替锌的?

Sarah Stanley, Science Writer by Sarah Stanley 1 April 20213 May 2022

网络分析表明,锌和镉硫化物在地质史上同步风化,在锌缺乏的情况下,镉可以作为光合途径的合适替代品。

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Features from AGU Journals

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Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
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“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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