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manganese

A panoramic view of rocky mounds on a rust-colored Martian landscape
Posted inNews

Does This Mineral Indicate Oxygen on Mars?

by Elise Cutts 30 January 202330 January 2023

Manganese oxides are thought to be a signature of atmospheric oxygen. But on the Red Planet, recent results suggest they might be more of a red herring.

A GEOTRACES research vessel in the Arctic Ocean
Posted inResearch Spotlights

Diurnal Oxidation for Manganese Minerals in the Arctic Ocean

by Morgan Rehnberg 13 January 202213 January 2022

The relative abundance of different oxidation states for this important micronutrient varies on the basis of how much available sunlight there is.

Margaritifera laevis shells on the bottom of a river.
Posted inNews

Freshwater Mussel Shells May Retain Record of Alpine Snowpack

by Stacy Kish 4 October 202112 October 2022

A new study explores a possible proxy for seasonal freshwater input that could elucidate changes in alpine snowpack as the planet warms.

Beach on barrier island Spiekeroog in Germany
Posted inResearch Spotlights

Microbial Mechanisms Change with the Seasons

by Elizabeth Thompson 1 April 202012 October 2022

Microbes living in the sand on a barrier island alter the way they break down organic matter as their environment changes throughout the year, which has implications for the surrounding water column.

Close-up image of gravel and dust on an asphalt
Posted inNews

Road Dust: A Health Hazard Hidden in Plain Sight

by Megan Sever 7 November 201912 October 2022

Legacy heavy metals from past industrial activity combine with traffic paint; asphalt; and bits of tires, brakes, and car parts to create toxic dust on our roadways.

Curiosity-rover-mineral-samples-liquid-groundwater-oxygen-atmosphere-Mars
Posted inResearch Spotlights

Minerals Hint at Liquid Groundwater, More Oxygen in Mars's Past

by Sarah Stanley 5 August 20163 January 2023

Manganese deposits in Gale Crater fractures are similar to Earth features that usually require flowing water and highly oxidizing conditions.

Posted inResearch Spotlights

Manganese Deposits on Mars Suggest a Highly Oxidized Past

by J. Rosen 18 November 201426 January 2023

Data from the Curiosity rover suggest that the surface of Mars has experienced more strongly oxidizing conditions than previously thought.

Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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