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California

Researchers assess how drought and groundwater drawdown impact land elevation in California’s Central Valley
Posted inResearch Spotlights

Tracing Water’s Path Through the Santa Clara Valley Aquifer

by S. Witman 10 November 20171 November 2021

In an increasingly drought prone climate, scientists study the impacts of drought on aquifer systems.

A school in Kern County in California destroyed by the 1952 earthquake.
Posted inNews

How to Trigger a Massive Earthquake

Lucas Joel by L. Joel 19 October 201727 October 2021

Humans may be to blame for California’s second-largest 20th century earthquake, and a team of seismologists has now proposed how that could have happened.

Researchers examine how the impact of atmospheric streams of water vapor varies across California
Posted inResearch Spotlights

California Floods Linked to Atmospheric Water Vapor “Rivers”

Sarah Stanley, Science Writer by Sarah Stanley 26 September 201730 January 2024

Narrow atmospheric streams of water vapor that deliver heavy rains are more commonly associated with floods and debris flows in northern California than with flash floods in southern California.

: Researchers create a 66-year data record to see how El Niño impacts temperatures in the California Current System
Posted inResearch Spotlights

Powerful Pacific Forces Disrupt the California Current

by S. Witman 11 August 20176 October 2021

Scientists create a 66-year data record to shed light on the role of El Niño in the California Current System’s shifting temperatures.

Researchers assess how a changing climate will influence ocean upwelling
Posted inResearch Spotlights

How Will Climate Change Affect the California Current Upwelling?

by Terri Cook 15 June 20176 October 2021

The results of new simulations that account for internal climate variability contrast with previous projections of how this vital West Coast current will respond to anthropogenic warming.

Kate Scharer examining sediments disrupted by the San Andreas Fault near Desert Hot Springs, California.
Posted inResearch Spotlights

Catching Glimpses of Centuries-Old Earthquakes

by S. Witman 5 May 201728 October 2022

Researchers in the western United States survey the earthquakes that have torn up California for the past millennium.

Researchers trace the history of California’s Whipple Mountains and find a new relationship between normal and detachment faults.
Posted inResearch Spotlights

On the Origin of Low-Angle Detachment Faults

by Terri Cook 7 March 20176 October 2021

Data from California's Whipple Mountains suggest this complex was formed by a succession of steep normal faults, challenging the paradigm that detachments are different types of faults.

Snow drought, seen here on slopes that should have snow.
Posted inOpinions

Defining Snow Drought and Why It Matters

by A. A. Harpold, M. Dettinger and S. Rajagopal 28 February 201723 January 2023

Swings from snow drought to extreme winter rainfall make managing reservoirs, like the Oroville Dam, incredibly difficult. But what exactly is "snow drought"?

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.

California governor Jerry Brown addresses a roomful of scientists at AGU’s 2016 Fall Meeting.
Posted inNews

California’s Governor Promises to Fight for Science

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 14 December 20166 October 2021

Scientific efforts must ratchet up in the face of rising climate change denial, Governor Brown said to a roomful of scientists.

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Machine Learning Simulates 1,000 Years of Climate

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As Simple as Possible: The Importance of Idealized Climate Models

28 August 202526 August 2025
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Waterworks on Tree Stems: The Wonders of Stemflow

21 August 202520 August 2025
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