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South America

The setting Sun sits just above the horizon and under a partly cloudy sky, with a body of water in the foreground.
Posted inResearch Spotlights

Biogeochemical Insights from a Major Amazonian River

Aaron Sidder, freelance science writer by Aaron Sidder 15 August 202322 October 2024

Underrepresented in global carbon budgets, tropical rivers like Brazil’s Tocantins are in need of study to establish their baseline characteristics in the face of increasing global change.

A rural road in Bandera, Santiago del Estero, Argentina, is flooded.
Posted inNews

Farming Is Intensifying Floods in the South American Plains

by Sofia Moutinho 10 August 202310 August 2023

The replacement of native vegetation by crops has raised groundwater levels in the Pampas, a new study suggests.

Photo of dust blowing on an Arizona hillside.
Posted inEditors' Vox

Danger in the Dust! The Hazards of Windblown Dust

by Thomas E. Gill, Daniel Tong, William Sprigg and R. Scott Van Pelt 1 June 202314 July 2023

Airborne dust not only causes disease, it also menaces transportation on land, sea, and air; disrupts renewable energy systems; transports pathogens and toxic substances; and poses many other hazards.

A forest of green trees in the foreground with low clouds and mountain peaks behind
Posted inResearch Spotlights

Short-Lived Solutions for Tall Trees in Chile’s Megadrought

by Rebecca Dzombak 31 May 202331 May 2023

Some southern beeches in the Andes have plumbed deeper for moisture as the surface has dried up. But doing so may deplete resources and undermine the trees’ future health.

A photo angled from above of a small white bird and a white egg in a nest of twigs.
Posted inNews

Harpy Eagles Concentrate Precious Nutrients in the Amazon

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 10 May 202325 May 2023

Amazon soils are usually low in the nutrients that plants covet, but harpy eagles can create local hot spots with their poop and prey.

Illustration of the central Amazon rainforest
Posted inEditors' Vox

Why Tropical Forests Are Important for Our Well-Being

by Laura Borma 3 March 20237 June 2023

Tropical forests play a critical role in supporting human well-being, food security, and the maintenance of biodiversity.

Mist permeates a lush rain forest in Tanzania
Posted inNews

Monitoring Moisture from Afar

by Danielle Beurteaux 12 October 202212 October 2022

Undisturbed tropical rain forests are experiencing more frequent droughts, but the ecosystems are isolated and difficult to assess. Scientists are using remote sensing to expand the depth and scope of monitoring efforts.

A person stands amid tall trees on a lush green mountainside.
Posted inResearch Spotlights

Amazon Basin Tree Rings Hold a Record of the Region’s Rainfall

Rachel Fritts, Science Writer by Rachel Fritts 11 October 202221 June 2023

New research provides a 200-year reconstruction of interannual rainfall in the Amazon basin using oxygen isotopes preserved in tree rings in Ecuador and Bolivia.

A small brown and gray mouse, Abrothrix hirta, sits on green grass strewn with a few brown leaves. The mouse faces left and is photographed in profile.
Posted inNews

Rain Makes Skulls Bigger—in Mice

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 4 October 202228 October 2022

New research shows how regional weather, shaped by towering mountain ranges, might influence the size and shape of local rodents.

Rocky high mountain landscape under a clear blue sky, with vegetation and a small lake in the foreground.
Posted inScience Updates

A Puzzle Mat for Assembling Colombia’s Geologic History

by Carolina Ortiz-Guerrero 11 April 202210 April 2023

A new database compiles all the available pieces of information about Colombia’s geochronology, offering scientists a consistent framework in which to view and study the data in a broader context.

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