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sediments

A researcher wearing waders stands ankle deep in muddy sediment, bending over to extract a water sample from the sediment using a plastic syringe.
Posted inScience Updates

Tracing Iron’s Invisible Transformations Just Beneath Our Feet

by Andrew R. C. Grigg, Katrin Schiedung, Joëlle Kubeneck and Ruben Kretzschmar 19 September 202519 September 2025

A new method that adds synthetic iron minerals to soils sheds light on hard-to-observe soil and sediment processes and may have a host of other applications in the Earth sciences and beyond.

Photo of sand ripples underwater.
Posted inEditors' Highlights

A First Look at How Sand Behaves Inside a Rippled Bed

by Ryan P. Mulligan 11 September 202511 September 2025

A detailed numerical model shows how sediment particles experience wave-driven shear stress inside and above a sea bed with sand ripples.

A large iceberg floats in blue Arctic Ocean water.
Posted inNews

Arctic Ice Shelf Theory Challenged by Ancient Algae

by Andrew Chapman 13 August 202513 August 2025

Chemical signatures of marine organisms reveal that seasonal sea ice, not a massive ice shelf, persisted in the southern Arctic Ocean for 750,000 years.

卫星图像显示了一条辫状河。
Posted inResearch Spotlights

布拉马普特拉-贾木纳河的迁移并非无规律可循

by Rebecca Owen 12 August 202512 August 2025

辫状河流系统中的河道线可能比以前认为的更容易预测。

An image of a slab of coral. Dark and light bands can be seen, which correlate with growing seasons.
Posted inNews

Coral Cores Pinpoint Onset of Industrial Deforestation

by Grace van Deelen 7 August 20257 August 2025

Trace elements in coral reefs provide a timeline of how Borneo’s rainforests have been altered by industry.

一个清澈的蓝色湖泊位于前景中广阔的干燥土地和背景中高耸的灰色山脉之间,山脉的底部覆盖着常绿的树木。
Posted inResearch Spotlights

地震如何改变湖泊微生物群落

by Rebecca Owen 6 August 20256 August 2025

提示:地震发生后,湖泊的地质、化学和生物成分会重新配置。一项新的研究深入探讨了地震变化对喜马拉雅地区措普湖的影响。

A clear blue lake lies between an expanse of dry dirt in the foreground and towering gray mountains whose lower reaches are covered in evergreen trees in the background.
Posted inResearch Spotlights

How Earthquakes Shake Up Microbial Lake Communities

by Rebecca Owen 24 July 20256 August 2025

After an earthquake, a lake’s geological, chemical, and biological components get reconfigured. A new study dives into the effects of seismic shifts on the Himalayas’ Lake Cuopu.

An image depicts a thin layer of sedimentary rock under a microscope. Fragments of fossilized organisms show up as small dark blobs.
Posted inNews

Biomass and Biodiversity Were Coupled in Earth’s Past

by Grace van Deelen 9 July 20259 July 2025

Measuring shells and skeletons encased in thousands of limestone samples has revealed that the sheer amount of living stuff in Earth’s oceans changed alongside the diversity of organisms.

A man in a bright yellow shirt crouches on a hill, overlooking a burned landscape.
Posted inNews

Pollution from Wildfires Can Contaminate Our Water for up to 8 Years, Study Finds

by Sophie Hurwitz 8 July 20258 July 2025

An analysis of 500 watersheds found levels of organic carbon, phosphorus, and other pollutants up to 103 times higher after a wildfire.

A satellite image of a braided river shows many channels branching out and reconnecting.
Posted inResearch Spotlights

Coherent, Not Chaotic, Migration in the Brahmaputra-Jamuna River

by Rebecca Owen 2 July 202512 August 2025

The channel threads in braided river systems may be more predictable than previously thought.

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