NASA Launches INSPYRE Campaign to Study Wildfire-Generated Pyrocumulonimbus Clouds
NASA has initiated the INSPYRE (INjected Smoke and PYRocumulonimbus Experiment) campaign to investigate pyrocumulonimbus (pyroCb) clouds, which are intense, fire-generated thunderstorms. For six weeks this summer, researchers utilized a Gulfstream jet and an ER-2 aircraft, equipped with various instruments, to fly above, below, and through these clouds. The campaign aims to understand how these elusive weather phenomena form and interact with the atmosphere. During one flight, scientists unexpectedly encountered a pyroCb cloud over the Wildhorse grass fire in eastern Idaho, providing a crucial opportunity for direct measurements. The team collected data on smoke particles, gases, ice crystals, and radiation, while ground crews also monitored wildfires. This research is critical because pyroCbs can inject smoke 30,000 to 50,000 feet into the atmosphere, reaching altitudes comparable to commercial jets and even the stratosphere, where smoke can persist for extended periods and spread globally.