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Global Biogeochemical Cycles

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Diagram of oxygen concentrations at 350 meters depth that shows the oxygen deficient zone, or shadow zone, in the eastern tropical North Pacific Ocean
Posted inResearch Spotlights

How the Ocean’s “Shadow Zone” Breathes

by E. Underwood 28 August 201922 December 2021

A new study uses Argo floats and an ocean circulation model to track the sources supplying pulses of oxygen to the deep North Pacific.

Satellite image of a collapsed storm over atolls
Posted inResearch Spotlights

Pacific Carbon Uptake Accelerating Faster Than Expected

by E. Underwood 29 May 201911 August 2022

A new study suggests that shifting ocean currents drive faster carbon dioxide uptake.

Petri dishes, each marked Geotraces
Posted inResearch Spotlights

Big Data Help Paint a New Picture of Trace Element Cycling

by Terri Cook 29 May 201911 October 2022

A new framework for understanding the suite of processes acting on marine particulate trace metals exemplifies how alternative analyses can maximize the information that large data sets provide.

An orca feeding on a seal
Posted inResearch Spotlights

A Look at How Long-Banned PCBs Persist in the Ocean

Aaron Sidder, freelance science writer by Aaron Sidder 7 May 201921 March 2022

A new study tracks how climatic factors like sea ice cover and ocean circulation affect the life span and distribution of polychlorinated biphenyls in the world’s oceans.

Aerial view of storm over the Bangweulu wetlands in Zambia
Posted inResearch Spotlights

Rising Methane Emissions Could Derail the Paris Agreement

by E. Underwood 19 April 20192 November 2021

A new study looks for the source of a spike in the potent greenhouse gas methane.

A close-up view of diatoms in the ocean
Posted inResearch Spotlights

Oceanic “Pump” Sends Small Carbon Particles to Twilight Zone

Sarah Stanley, Science Writer by Sarah Stanley 7 March 201914 January 2022

Underwater gliders provide unprecedented, daily data that reveal new insights into how carbon gets from the atmosphere to the deep ocean.

A satellite view of Saharan dust plumes over the Atlantic Ocean
Posted inResearch Spotlights

A Novel Approach Reveals Element Cycles in the Ocean

Aaron Sidder, freelance science writer by Aaron Sidder 16 January 201928 January 2022

Dissolved thorium isotopes light the way to a more thorough understanding of how different elements enter marine environments—and how long they stay there.

Posted inEditors' Highlights

Radionuclide Data from GEOTRACES Improve Particle Flux Estimates

by K. Matsumoto 7 January 201927 September 2022

New measurements of multiple radionuclides in the Atlantic Ocean offer a robust constraint on the sinking flux of particles and associated vertical fluxes of biogeochemically important elements.

A view of Dixon Entrance off the west coast of British Columbia, Canada
Posted inResearch Spotlights

Tool to Capture Marine Biological Activity Gets Coastal Upgrade

Sarah Stanley, Science Writer by Sarah Stanley 27 November 201814 April 2022

Upwelling hinders an efficient method to estimate a key measure of biological productivity in coastal waters, but accounting for surface temperatures could boost accuracy.

Researchers analyze just how much silica is being transported across Earth’s oceans by phytoplankton
Posted inResearch Spotlights

The Tiny Organisms That Transport Silica Across Earth’s Oceans

by E. Underwood 29 June 201828 January 2022

Phaeodarians play a major role in marine nutrient cycle.

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