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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 20224 May 2022

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 202225 April 2022

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 B. 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.

Plot showing distribution of iron species at three locations
Posted inEditors' Highlights

Zero-valent Iron in the Oxidizing Atmosphere?

by Jonathan H. Jiang 26 October 20205 May 2022

A comparative study of urban, semi-urban, and rural sites reveals that the species of atmospheric iron varies depending on location.

Map showing the location of study in northern Italy and inset image showing bathymetry of Lake Tovel
Posted inEditors' Highlights

Climate Warming Improves Oxygen Mixing in a High-Altitude Lake

by D. Scott Mackay 10 September 202020 April 2022

Long term weather and lake data from a high elevation lake in the Alps demonstrate that climate warming may actually improve the ability of high-altitude deep lakes to mix their waters.

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