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S. Witman

Researchers explore how grazing animals impact their ecosystems—and the climate
Posted inResearch Spotlights

Critical Role of Grazing Animals in an Ecosystem

by S. Witman 30 January 201820 October 2021

Scientists model the effect of horses, cattle, sheep, and goats on local environments and global climate.

Researchers review how comprehensive climate observations could improve life on Earth.
Posted inResearch Spotlights

Reckoning with Climate’s Most Challenging Questions

by S. Witman 23 January 201831 January 2022

Climate researchers outline a vision for the future of climate observations.

Researchers capture the first complete image of Earth’s geocorona
Posted inResearch Spotlights

Tracing the Path of Gas Atoms from Earth to the Final Frontier

by S. Witman 22 January 201817 January 2023

Scientists capture the first complete image of Earth’s luminous geocorona and prove its ecliptic north–south symmetry.

Researchers use ground-penetrating radar to spot carbon stores in the Disney Wilderness Preserve
Posted inResearch Spotlights

A Better Way to Probe Peat

by S. Witman 10 January 20181 April 2022

Florida scientists use ground-penetrating radar to image underground carbon stores in the Disney Wilderness Preserve.

An illustration of the Earth’s magnetic field lines, generated by the planet’s swirling liquid outer core.
Posted inResearch Spotlights

Tracing Electric Currents That Flow Along Earth’s Magnetic Field

by S. Witman 3 January 201816 November 2021

A new study uses satellite data to examine a worldwide system of electric currents in greater detail than ever before.

Researchers use satellite data to analyze leaf water content
Posted inResearch Spotlights

Scientists Probe Water Inside Leaves via Satellite

by S. Witman 2 January 201831 October 2022

Improving satellite-based studies of vegetation optical depth, a critical ecosystem indicator.

Researchers outline how the world can transition to 100% clean, renewable energy by 2050.
Posted inResearch Spotlights

The Power of Water, Wind, and Solar (and Nothing Else)

by S. Witman 28 December 201728 February 2023

Road map for improving climate calls for 100% clean, renewable energy by 2050.

Researchers use seismic data to trace the timeline of a recent earthquake off the coast of Chile
Posted inResearch Spotlights

Mapping a Valparaíso Earthquake from Foreshock to Aftershock

by S. Witman 14 December 2017

Using seismic data recorded along the Chilean coast, scientists retrace the development of a recent earthquake.

New modeling shows how snow salinity may cause errors in satellite measurements of Arctic sea ice thickness
Posted inResearch Spotlights

Reducing Errors in Satellite-Derived Arctic Sea Ice Thicknesses

by S. Witman 4 December 20177 February 2023

Salty snow throws off satellite-based estimates of Arctic sea ice thickness by up to 25%. A new method seeks to fix that.

Researchers examine South China Sea water samples to understand how dissolved black carbon is cycled through Earth’s oceans and atmosphere.
Posted inResearch Spotlights

Plumbing the Depths of the Marine Carbon Cycle

by S. Witman 21 November 201717 March 2023

Scientists measure dissolved black carbon in South China Sea water samples to better understand the carbon cycle in the oceans, which absorb roughly half of all carbon emitted into the atmosphere.

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Features from AGU Publications

Research Spotlights

Tracing Black Carbon’s Journey to the Ocean

11 July 202510 July 2025
Editors' Highlights

The Power of Naming Space Weather Events

10 July 20258 July 2025
Editors' Vox

Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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