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oxygen

A view of a swamp on Rishiri Island, with trees and water in the foreground and a snowy mountain in the background
Posted inResearch Spotlights

Climate and Currents Shaped Japan’s Hunter-Gatherer Cultures

by Rebecca Dzombak 5 May 2022

New climate records from a peat bog show how two neighboring cultures responded differently to shifts in climate and ocean currents.

A diver in scuba gear holds a coring device to collect a sample from a coral head on the seafloor in clear, light blue water.
Posted inScience Updates

Clues from the Sea Paint a Picture of Earth’s Water Cycle

by Kristine DeLong, Alyssa Atwood, Andrea Moore and Sara Sanchez 4 May 202225 January 2023

New instrumentation and growing modeling needs in the Earth sciences are driving a renewed effort to compile and curate seawater oxygen isotope data in a centralized, accessible database.

A red rock tower in front of a backdrop of cloudy sky
Posted inFeatures

Is Earth’s Core Rusting?

by Jiuhua Chen and Shanece S. Esdaille 25 April 20223 January 2023

If subduction carries hydrous minerals deep into Earth’s mantle, they may “rust” the iron outer core, forming vast sinks of oxygen that can later be returned to the atmosphere.

Posted inEditors' Highlights

What Caused the Open Habitat Transition in the West-Central U.S.?

by Susan Trumbore 10 March 202212 April 2022

Between 26-15 My ago, forests covering west-central North America gave way to open, grassy habitats. Now, oxygen isotope records suggest this shift is owed to drier winters and increased aridity.

Simulation of ions escaping the Martian atmosphere
Posted inResearch Spotlights

测量火星大气中的碳离子损失

by Morgan Rehnberg 10 March 202210 March 2022

NASA的MAVEN探测器观测到的碳通量与模型相符,比氧离子低1到2个数量级。

Satellite image of sea ice in the southwestern Labrador Sea.
Posted inNews

Oxygen Levels Measured in a Lung of the Deep Ocean

by James Dacey 23 February 202223 February 2022

The Labrador Sea “inhales” oxygen and supplies it to deep-sea life across the world. But its breath could be threatened by climate change.

Simulation of ions escaping the Martian atmosphere
Posted inResearch Spotlights

Measuring Carbon Ion Loss from the Martian Atmosphere

by Morgan Rehnberg 8 February 202210 March 2022

The flux, observed with NASA’s MAVEN spacecraft, is in line with models and 1–2 orders of magnitude lower than that of oxygen ions.

Chart showing that results from a family of simulations that track changing pressures of three gases
Posted inEditors' Highlights

Is Atmospheric Oxygen a Planetary Signature for Life?

by Bethany Ehlmann 21 April 202115 March 2022

While some Earth-like worlds can generate significant O2 only by biology, “waterworlds” and “desert worlds” can build up O2 even without life because of chemical changes from atmosphere loss to space.

Tiendas de campaña debajo de la cima con nieve del Everest.
Posted inNews

El Monte Everest a veces puede sentirse más bajo que el K2

Katherine Kornei, Science Writer by Katherine Kornei 16 March 202119 August 2022

Las variaciones de la presión atmosférica en la cima del Everest afectan a la disponibilidad de oxígeno, modificando la percepción de la elevación de la cumbre unos cientos de metros.

Tents below the snow-capped summit of Mount Everest
Posted inNews

Mount Everest Can Sometimes Feel Lower Than K2

Katherine Kornei, Science Writer by Katherine Kornei 22 December 202019 August 2022

Variations in air pressure on the top of Mount Everest affect oxygen availability, changing the perceived elevation of the summit by hundreds of meters.

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