California

A giant sequoia tree at Yosemite National Park's Mariposa Grove of Big Trees.

Geography of Giant Sequoias

Elizabeth Borneman

Giant sequoias are one of the longest lived tree species, with the oldest giant sequoia living an estimated 3,400 years.

A map showing moisture levels carried by an atmospheric river over the West Coast including California. High moisture levels are a dark blue-green and low moisture levels are brown.

What is the Outlook for California’s Atmospheric Rivers?

Caitlin Dempsey

During the winter months, atmospheric rivers carry enormous amounts of water to the state of California.

A view across a valley of a dome volcano on a bright sunny day with a blue sky and some clouds.

Largest Dome Volcano in the World

Caitlin Dempsey

Lassen Peak is the world's largest dome volcano with a height of 10,457 feet (3,187 meters).

A gray shaded relief map of California showing in shades of green where climate mismatched forests are in the Sierra Nevada.

Zombie Forests in the Sierra Nevada

Katarina Samurović

Climate change is creating a vegetation climate mismatch in the conifer forests of California's Sierra Nevada.

Several mountains with lush green bushes and trees.

Chaparral in California

Caitlin Dempsey

Chaparral ecosystems in California are characterized by dense shrubs and rocky terrains and span from maritime zones to mountain slopes.

A shaded relief map of the Central Valley in California showing the location of Tulare Lake.

California’s Wet Winter Brought Back an Ancient Lake

Caitlin Dempsey

The once-vanished Tulare Lake reemerged after an exceptionally wet California winter, reclaiming a portion of its historic expanse in 2023.

A blackbird feeding nestlings in a nest built on top of a rusty rake. A red wooden wall is in the background and a white downspout helps to support the nest.

Synanthropes at a Horse Stable in Northern California

Caitlin Dempsey

Synanthropes are wildlife that benefit from living near humans.

The beaver faces the camera. Its tail extends to the right and is cocked on its side, making the paddle-shape more visible.

Building It Back – Beaver Reintroductions Across the World

Katarina Samurović

Since the 1920s, beavers have been artificially re-introduced to many habitats across their former range.

[Map of California shown as an island], Joan Vinckeboon, ca. 1650.

California as an Island

Caitlin Dempsey

Well into the 17th and 18th centuries, cartographers created maps of the region showing California separated from the mainland by a strait.

Side by side satellite images showing the water level in Lake Oroville between June 2019 (left) and June 2021 (right).

California’s Drought is Driving Reservoirs to Near Historic Lows in 2021

Caitlin Dempsey

The second year of California's drought is driving down water levels in the state's reservoirs in 2021.

Ocotillo (left) and saguaro (right) are two plants found in the Sonoran Desert. Photo: National Park Service/Alice Wondrak Biel, Saguaro National Park, Public domain.

The Sonoran Desert is Losing Plants Due to Climate Change

Caitlin Dempsey

Between 1984 and 2017, a team of researchers utilized Landsat imagery to examine changes in vegetation in the Colorado Desert in Southern California.

This photo from the International Space Station shows the location of Salton Sea between Imperial and Coachella Valleys. Image; NASA, June 12, 2002

California’s Largest Lake

Caitlin Dempsey

Floodwater from a broken irrigation canal gate in 1905 created California's largest lake.

Looking at Centuries of California’s Climate to Understand Fire Risk

Elizabeth Borneman

Researchers examined moisture patterns and atmospheric wind conditions in California using climate models and centuries of paleoclimate data (from 1571 to 2013).

Normalized difference vegetation index satellite images of the state before and during the drought. | Image courtesy Chunyu Dong/UCLA.

Climate Change is Intensifying Drought in Southern California

Caitlin Dempsey

Researchers from UCLA and Columbia University discovered that the 2012–16 drought impacted Southern California more severely than northern regions.

Largest Fires in California’s History

Katarina Samurović

In California, the officially hottest month on the record- July - was topped with the most severe wildfire season that Californians have ever witnessed. 

Map showing the study area in the northern Sierra Nevada ecoregion, California, USA, above 914 m elevation (3000 feet).

How Climate Change is Affecting the Forests of the Sierra Nevada

Elizabeth Borneman

Climate change is causing certain key species in the Sierra Nevada mountains to change where they are growing according to a study published by the journal California Fish and Game.

According to Ramirez, the lack of center posts underneath Newport Pier makes it a "photographer's dream."

Photographing and Mapping Piers

Kristina Jacob

Ana Ramirez, a San Diego-based photographer, talks with Kristina Jacob about her photography project, Into The Ocean – Photos of California Piers.

Mapping out stories about pollutants in California.

Mapping the Impacts of Climate Change in California

Caitlin Dempsey

A group of Stanford students taking a biology class entitled Geographic Impacts of Climate Change: Mapping the Stories have mapped out news and journal articles about climate change in California.

Tule Fog Declining in California’s Central Valley

Caitlin Dempsey

A group of researchers analyzed satellite imagery over a 33 year span to establish an understanding of the fog climatology in the Central Valley.

Smartphone Maps Illegal While Driving but Paper Maps are Okay in California

Rebecca Maxwell

In recent years, some states have been putting harsher laws in place to curb drivers talking on their cellphones or ...