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biogeochemistry

A black smoker, shaped like a stone cylinder on the ocean floor, spews black smoke into the water.
Posted inNews

Arctic Hydrothermal Vents May Resemble Those on Enceladus

by Anna FitzGerald Guth 17 December 202417 December 2024

By studying hydrogen-rich vent sites on Earth, scientists could learn more about the hidden ocean of Saturn’s icy moon—one of our solar system’s likeliest candidates for harboring life beyond Earth.

In this artist’s rendition, a satellite consisting of two umbrella-shaped instruments and two solar panels is seen in the foreground. In the background, a crescent of Earth is shown in the blackness of space.
Posted inNews

Next NASA Field Campaign Could Fund Projects in Drylands or Tropics

by Saima May Sidik 1 November 20241 November 2024

Scientific feedback can improve proposals and signal support for large-scale, intensive climate research.

Satellite image of brown dust over a blue ocean
Posted inNews

Saharan Dust Carries Iron That Feeds Life in the Distant Ocean

by Katherine Bourzac 30 October 202430 October 2024

A new study of seafloor sediments suggests reactions in the atmosphere convert dust-borne iron into forms more readily taken up by phytoplankton.

A satellite image shows miles-wide blooms of green phytoplankton in the ocean.
Posted inNews

Microbe Preferences Drive Ocean Carbon Pump

by Grace van Deelen 15 October 202415 October 2024

New research offers insight into how certain bacteria degrade organic matter in Earth’s oceans.

People floating in colorful tubes in the distance down gentle river rapids.
Posted inNews

Labor Day Dips Alter Stream Composition

by Grace van Deelen 30 August 20242 June 2025

Holiday weekend tubing introduces toxic chemicals and shifts microbial communities in a popular Colorado river.

A microscopic image of remnants of silicifying organisms
Posted inNews

Clays May Have Slowed Earth’s Recovery After the Great Dying

by Kate Evans 19 August 202419 August 2024

Without tiny marine organisms using silica for shells, Earth’s oceans generated more clay, released more carbon dioxide, and kept Earth warmer for longer.

White bubbles in water next to corals
Posted inNews

Corals Are Simplistic When Conditions Are Acidic

by Anupama Chandrasekaran 16 August 202416 August 2024

Increasing ocean acidity could spell trouble for fish that depend on corals’ many branches for protection.

A green Acaryochloris marina culture in a conical flask
Posted inNews

Red-Light-Loving Bacteria Could Expand the Search for Life

by Kristel Tjandra 22 May 202422 May 2024

Scientists are uncovering genes responsible for oxygenic photosynthesis in cyanobacteria to shift the search for potentially habitable worlds.

A boat holding an instrument on a foggy lake
Posted inNews

Chemodiversity Could Indicate Freshwater Ecosystem Health

by Grace van Deelen 18 April 202418 April 2024

High-resolution mass spectrometry provides innovative analyses of dissolved organic matter.

An oil rig surrounded by a green wall sits on a dirt landscape. Three people, surrounded by boxes and bags, sit in the dirt and examine instruments.
Posted inResearch Spotlights

Anthropocene Activities Dramatically Alter Deep Underground Fluid Flux

Sarah Stanley, Science Writer by Sarah Stanley 17 April 202417 April 2024

Scientists call for improved understanding of how our influence on deep subsurface fluids and microbes might affect the larger Earth system.

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