Deltas Retain 28% of Global River Sediment, the Rest Enters the Ocean
Rivers transport sediment to the coast, but how much get offshore is a mystery. A new study shows that deltas retain 28% of the global…
Connecting Radio Wave Disruption to “Hot” Charged Particles from Afar
A tag-team of satellites and ground GNSS receivers track down the source of a radio signal disruption (scintillation) from afar—a “hotspot” of plasma some 60,000…
Now Critical: Optimizing Complementary Ocean Carbon Observing Networks
Sustaining global ocean carbon observations to provide climate information and support model projections requires the optimization of complementary observational networks to maximize synergies.
The Geomagnetic Polarity Time Scale Revisited Once Again
Scientists present a refined multi-method geomagnetic polarity time scale for the Late Cretaceous through the Eocene.
Equatorial Pacific Warming Pattern Mitigated by Slow Ocean Adjustment
Model simulations under an abrupt 4x CO2 scenario reveal that initially enhanced gradients in sea surface temperature under global warming are then mitigated by circulation…
Biosignatures Extend Robustly into the Top Kilometer of Sedimentary Basins
Through the top kilometer of sedimentary basins, biosignatures track microbial cells, permeability, and water inputs. Below that, permeability limits microbial presence despite temperatures conducive to life.
Melting Permafrost Impacts Arctic Rivers in Vulnerable Regions
Changes in river chemistry in the northwestern North American Arctic reflect increased acid rock drainage associated with permafrost thaw, an unexpected consequence of Arctic warming.
Limits of Satellite Detection of Extreme Carbon Cycle Events
Satellite carbon dioxide observations detect more carbon-cycle extremes than ground stations but still miss many events and underestimate their magnitude.
New Insights into Permafrost Degradation and Subsidence
A 20-year monitoring study in the discontinuous permafrost zone of Nunavik, Canada documents changing ground thermal dynamics and associated thaw subsidence.
Reducing Uncertainty in Groundwater Models Using Airborne Geophysics
Scientists present a probabilistic framework for exploiting airborne geophysical data for groundwater model parameterization and apply it to the Scott River aquifer system in Northern California.
“Young Get Older, but Old Get Younger”: Counterintuitive Ocean Waters
Warming surface waters and increased stratification result in uneven loss of dissolved oxygen across the Pacific basin that shifts water mass age.
Seasonality is Changing for Extreme Dry and Humid Heat Events
NASA’s MERRA-2 reanalysis of past weather and climate reveals substantial shifts in extreme heat seasonality over the past 45 years.
Dust and Marine Halogens Team Up to Destroy Tropospheric Ozone
Mineral dust-activated halogen chemistry is an important yet under-studied natural sink of the tropospheric ozone with implications for the Earth’s oxidative balance, crop yields, and human health.
Reading Fault Stress from the Rhythm of Earthquakes
T-rate, a new Bayesian tool that reconstructs changing fault stress from earthquake rates, reveals a late stress increase before the 2008 Reno–Mogul magnitude 5.1 earthquake.
Extreme Equatorial Storms are Larger and More Persistent Under Warming
Extreme storms in the tropical regions are expanding and becoming more persistent with climate warming, resulting in higher storm rainfall volumes while peak intensity remains unchanged.
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