The second-largest mass extinction in Earth’s history took place in a period of stresses from non-sulfidic anoxia in shelf areas, together with glacioeustatic sea-level change and climatic cooling.
Editors’ Highlights
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A Deep-Space Origin for Volatile-Rich Asteroids
Spectral data and modeling suggest that volatile-rich main-belt asteroids initially formed at much greater distances from the Sun (>10 AU).
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Field Kits Effectively Predict Arsenic Contamination
Field kits used in Bangladesh to test arsenic exposure from contaminated drinking water are effective in comparison to expensive laboratory arsenic tests.
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Managing Strategic Water Resources in a Changing Climate
Another significant step has been taken in methods for managing water resources in the face of climatic changes and other future uncertainties. Dynamic adaptation is becoming a reality.
![Figure 2 from Wang and Tkalčić [2021]](https://eos.org/wp-content/uploads/2022/01/2021GL094784-Figure-2-sized-1200x675-1.png)
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Observation of Shear Wave Anisotropy in the Earth’s Inner Core
Coda-correlation wavefields reveal direction-dependent inner-core shear-wave speed, ~5 s faster in directions oblique to the Earth’s rotation axis than directions parallel to the equatorial plane.
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The Flowers that Bloom in the Spring (but Later)
Mismatch between the pace of climate change and crop phenology may signal a new challenge for climate change adaptation.
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Hot Lakes in a Cold Climate
Arctic warming may release less carbon dioxide from high latitude lakes but increase their climate impact by releasing more methane.
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Clouds Overshooting Tops and Typhoon Intensity
An examination of the relationship between the diurnal variation of cloud overshooting tops density and typhoon intensity in 45 typhoons, using the Himawari-8 Satellite.
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Next-Generation Solar Proton Monitors for Space Weather
NOAA’s weather satellites at geosynchronous orbit also measure space weather and a new series of instruments bring improved capabilities for monitoring and science discovery.
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Tracking from Space how Extreme Drought Impacts Carbon Emissions
Carbon dioxide emissions from wildfires combined with reduced carbon uptake by intact ecosystems during the 2019-202
0 fire season to approximately double Australia’s annual carbon emissions.