Reactive gases like ozone are hard to preserve, but clumped isotopes and models provide clues to past ozone and suggest a global increase in wildfire at megafaunal extinction.
Editors’ Highlights
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Coseismic Displacement of 1987 Earthquake from Aerial Images
Differencing digital surface topography models constructed from historical aerial photographs reveal the coseismic surface displacement field of the 1987 earthquake in northern New Zealand.
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Callisto’s H Corona: Offspring of the Surface or the Atmosphere?
The mostly unknown Callisto’s H corona is created by a global tenuous H2 atmosphere and not by surface water as previously believed, providing the first evidence for H2 in Callisto’s atmosphere.
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Using Big Data for Monitoring Network Design and Beyond
Large data sets can be generated using deep learning to improve the design of observation networks for monitoring subsurface flow and transport.
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New Mechanism for “Giant” Greigite Growth in Deep-Sea Sediments
Understanding greigite formation pathways in sediments is a prerequisite for assessing the marine iron-sulfur-carbon cycle and yield reliable near-syn-sedimentary paleomagnetic records.
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Accurate Ocean Tides for Earth System Models
Accurate tide models require self-attraction and loading terms, but can this calculation be done accurately and efficiently for use in global tide and Earth system models?
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Characteristics of the 2021 Pacific Northwest Heatwave
Examining the 2021 Pacific Northwest heatwave using both historical observations and model simulations.
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Understanding Enhanced Arsenic Pollution in Shallow Lakes
A new study explains why the arsenic that has accumulated in lake bottom sediments is more harmful to the lake ecosystems in shallow lakes.
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Extremeness of Seasons Determined by Planetary Motion Parameters
We’ve long known that a planet’s orbital period and tilt determine length and intensity of seasons. We now see rotation rate matters too: max temperature shifts poleward as rotation slows.
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Disentangling River Water Turbidity and its Flow
A new study shows why fine sediments in rivers are not simply proportional to the water flow across the United States.