Editing Wildfire smoke PM2.5 concentration (section)

== Boundary Conditions ==
Boundary inclusions encompass ambient PM2.5 particles originating from biomass combustion in wildfires within the defined spatial and temporal domain, measured as annual mean concentrations. This includes primary particles emitted directly by fires and secondary particles formed from chemical reactions involving wildfire emissions.

Boundary exclusions omit PM2.5 contributions from non-wildfire sources such as urban pollution, industrial emissions, prescribed burns (unless specified), and natural background aerosols unrelated to wildfire activity. Indoor PM2.5 concentrations and transient concentration spikes outside the annual mean framework are also excluded. The signal scope is limited to ambient outdoor air.