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Sierra Nevada

A house covered in several feet of snow
Posted inNews

California Mountains Face Weather Whiplash

by Andrew Chapman 28 March 202428 March 2024

Last month’s massive snowstorm in the Sierra Nevada followed a dry start to winter. Such extremes in precipitation may become the norm.

A researcher at street level looks uphill at downed trees and other debris from a debris flow.
Posted inNews

Postfire Debris Flows Strike in a Puzzling Pattern

by Eli Ramos 15 December 202315 December 2023

California geologists are improving their understanding and forecasting of which slopes in wildfire-burned areas might fail during heavy rainstorms.

The Apple Fire burns north of Beaumont, Calif., on the evening of 31 July 2020.
Posted inResearch Spotlights

Uncovering Patterns in California’s Blazing Wildfires

Aaron Sidder, freelance science writer by Aaron Sidder 1 March 20217 March 2023

A study of trends in wildfire occurrence over the past 30 years shows that environmental, climatic, and human-related factors can point out regions with high fire probabilities.

A conifer forest with many dead trees is seen in the foreground, with the Sierra Nevada in the background
Posted inScience Updates

Linking Critical Zone Water Storage and Ecosystems

by R. C. Bales and W. E. Dietrich 14 October 20207 March 2023

The geology and the structure of Earth’s critical zone control subsurface moisture storage potential and determine the resilience of forest and river ecosystems to drought.

Vista of Half Dome and Yosemite National Park
Posted inNews

Role of Continental Arcs in Global Carbon Dioxide Emissions

Erik Klemetti, Science Writer by Erik Klemetti 10 June 20197 March 2023

Continental arcs are a major player in global carbon dioxide emissions, but quantifying that relationship is hard. A new study accepts the challenge on a global scale over 750 million years.

Posted inEditors' Highlights

Using Radioactive Tracers to Determine the Ages of Streamflow

by Ilja van Meerveld 18 March 20197 March 2022

Radioactive isotope tracers can be used to determine the relationship between the ages of water that is stored in soil and bedrock, water in streams, and the water used by vegetation.

Mineral layers offer a key to examine the behavior of individual magma pulses in volcanic arcs.
Posted inResearch Spotlights

Pulses of Rising Magma in Sierra Nevada's Past

by Terri Cook 3 February 20177 March 2023

A detailed study of layered igneous material at California's Fisher Lake offers a novel approach to identifying the pathways and timescales of individual magma pulses in volcanic arcs.

Rain over California’s Owen’s Valley in early May 2016. The 2015–2016 El Niño, which officially ended in late May, was one of the strongest El Niños on record.
Posted inResearch Spotlights

Monster El Niño Not Enough to Quench California Drought

by Lauren Lipuma 15 July 20167 March 2023

New research shows that the Sierra Nevada snowpack will likely not recover from the current drought until 2019.

Posted inNews

Satellites Show True Extent of California Drought

by N. Weiler 18 December 201430 May 2023

Since 2011, California’s water supply has lost 4 trillion gallons per year and the Sierra Nevada snowpack has hit record lows.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

Research Spotlights

Scientists Reveal Hidden Heat and Flood Hazards Across Texas

16 May 202516 May 2025
Editors' Highlights

Revised Emissions Show Higher Cooling in 10th Century Eruption

16 May 202515 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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