When striking a solid object such as trees or grass, it is warmed. The sun emits short-wave energy rays (radiation). The differential heating of the earth’s surface is the driving forceīehind most of the influences on the atmosphere. As a result, less heat is required for ignition. This decrease is known as the adiabatic lapse rate.įorest fuels receive heat by radiation from the sun. These temperatures generally decrease aboutģ.5 degrees per thousand feet in altitude. This is the reason that the temperature above the surface is cooler The surface is in turn warmed by heat reflecting from the surface. This heat warms up the surface of the earth and the atmosphere close to Sun is transferred to the earth by radiation. In addition drought, a result of certain weather conditions,Īir temperature has a direct influence on fire behaviorīecause of the heat requirements for ignition and continuing the combustion There are several elements of weather that must be considered. The role weather plays in the start and spread of wildfires and in the use of prescribed Fires.
Weather and Topography), weather is the most important, yet it is continuously Of the three major components making up a fire’s environment (Fuel, WeatherĬhanging day-by-day, hour-by-hour and even minute-by-minute. The atmosphere is a gaseous mantle (mostly oxygen and nitrogen) encasing State of the atmosphere surrounding the earth at a certain area. Weather Elements that Affect Fire Behavior