Quality and Influencing Factors of Particulate Matter Released by Surface Fuel Combustion in Korean Pine Plantation

【Objective】Based on the indoor burning experiment carried out in the combustion wind tunnel laboratory, the particle size distribution and variation characteristics of the particulate matter released by surface fuel combustion in Korean pine plantation were quantitatively revealed, which would provide reference for the particulate matter released by forest fire. 【Method】 The Korean pine plantation in the eastern mountainous area of Northeast China was selected as the object, and the fuel bed with different wind speed, fuel load and fuel moisture content was constructed. Based on 108 ignition experiments in the combustion wind tunnel laboratory, real-time monitoring was carried out by using the dissolved aerosol monitor（TSI Dust Trak 8533, USA）, and random forest algorithm was used to establish a prediction model for particles of different sizes. 【Result】 Wind speed was one of the most important factors affecting the mass of the four particle matter sizes. PM1 was most affected by wind speed（37.207%） and tempe