What is stratification in the context of fire behavior?

Stratification in the context of fire behavior refers to the layering of smoke due to differences in density. As smoke rises, it can form distinct layers depending on temperature, particulate content, and moisture levels. The temperature differences cause lighter, hotter smoke to rise and create a layering effect with cooler, denser air below. This phenomenon is critical to understand for fire suppression strategies, as different layers of smoke can indicate the movement of heat and potential areas of fire spread. Recognizing stratification helps firefighters assess the environment and make informed decisions regarding ventilation and suppression tactics.