Image Gallery

Our photographs represent research, presentations, award ceremonies, fire simulations, tours, and educational events. Click on an image to see a larger view and description. Browse related images by tags. Photos are provided by the USDA and Forest Service unless otherwise noted.

Crown fire in a scots pine stand within the Chernobyl exclusion zone during a wildland fire in August 2015. Radionuclide emissions from this and other recent fires have been detected thousands of miles from Chernobyl.

Assessing a fire-scarred lodgepole pine tree

Convection heat transfer requires flames to contact adjacent fuels. Discontinuous fuels (e.g. shrub and tree canopies) require flames to extend across gaps between fuel clusters. The vertical flame wall with its high sample rate heat flux sensors (shown) and thermocouples are used to describe flame turbulence and thus the flame position and duration. Diffusion flames are produced using buoyantly neutral ethylene fuel gas.

An instrumented fuel bed composed of laser-cut cardboard. These uniform fuel beds are burned in the wind tunnel to determine rate of spread and other physical characteristics of fire.

demonstrates use of the glowing radiant panel. Surrounded by reflections from elliptical mirrors, the panel allows researchers to examine the effects of radiant heat on ignition rates.

(Credit: Photo courtesy of Richard Barnes / OTTO)

Measuring water potential

Measuring resin flow

clockwise from upper left: Dan Jimenez assists with a prescribed burn in Georgia pine forests.; A prescribed fire is lit from the road in the burn unit. Elliot Conrad also assists with the burns.

(Credit: Matt Jolly)