Soil clay content is an important characteristic that affects many hydraulic and mechanical properties of soil; clay mineral type is important for their prediction.
Editors’ Highlights
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El Niño-Southern Oscillation and Radiation Two-Way Coupling
Changes in sea surface temperature during ENSO events and radiation are related, suggesting a two-way coupling between sea surface temperature and radiation in coupled climate variability.
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Evolution is More Important than Environment for Water Uptake
Despite conventional assumptions, a new study shows that evolutionary proximity of species defines root water uptake strategies, not their position in landscape or ambient environment.
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Bubble, Bubble, Toil and Trouble: Ocean Vents Spew Rubble
Hydrothermal vents in the ocean emit 6000-year-old carbon. The likely source? Ocean crust.
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Can Aurora Enhance Radar Monitoring of Arctic Aviation?
Enhanced E-region ionization produced by the aurora can be used to reflect signals from over-the-horizon radars and thus enable those radars to better monitor aviation in Arctic regions.
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What Conditions Accompanied the Late Ordovician Mass Extinction?
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.
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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://i0.wp.com/newspack-dev.eos.org/wp-content/uploads/2022/01/2021GL094784-Figure-2-sized-1200x675-1.png?resize=1200%2C675&ssl=1)
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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.