wildfires

Map showing the NDVI anomaly in 2024 compared to average levels from 1991 to 2020). After a couple of years of above average precipitation in Southern California, vegetations levels in the summer of 2024 were 30% greener than average. Map: NASA, public domain.

Hydroclimate Whiplash: the Impact on California Wildfires

Caitlin Dempsey

Hydroclimate whiplash - the rapid swing between drought and heavy precipitation - plays a role in the increasing intensity of California wildfires.

Taken at about 30,000 feet (9 kilometers) over eastern Washington, the smoke plume (gray) feeds the pyrocumulonimbus cloud (white). Photo: David Peterson (U.S. Naval Research Laboratory), public domain, August 8, 2019.

Understanding the Increase in PyroCbs: Wildfire Thunderstorms

Caitlin Dempsey

The phenomenon of fire-triggered thunderstorms is called pyroCbs, which is short for pyrocumulonimbus clouds.

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.

Southern California neighborhood scarred by wildfire. Photo: Jon Keeley, USGS Western Ecological Research Center. Public domain.

Study: More U.S. Homes Burn in Grassland and Shrubland Fires than Forest Wildfires

Caitlin Dempsey

A new study in Science reports that in the United States, grassland and shrubland fires tend to be more extensive and burn more houses than forest fires.

Fire and embers glow orange on the floor of a conifer forest at twilight.

Mapping Wildfire Movement

Caitlin Dempsey

The Fire Events Data Suite is being used to map near real-time wildfire behavior including fire perimeters, active front, and total burned areas.

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