中文摘要：

基于30m、500 m和1 km空间分辨率的TM、MODIS和AVHRR卫星遥感数据,估算2006年大兴安岭一次森林火灾的排放量,并评估空间分辨率对排放量估算的影响。结果显示：不同空间分辨率卫星估算的火烧迹地面积差异为4.3%-13.8%,随着空间分辨率降低,遥感估算火烧迹地面积逐渐减小。不同空间分辨率卫星估算的二氧化碳（CO2）、一氧化碳（CO）、甲烷（CH4）、非甲烷总烃（NMHC）、氮氧化物（NOx）、二氧化硫（SO2）、可吸入颗粒物（PM2.5）、黑炭（BC）、有机碳（OC）的排放量分别为1.01×10^6-1.64×10^6t、6.07×10^4-9.58×10^4t、2.91×10^3-4.51×10^3t、4.61×10^3-7.18×10^3t、1.83×10^3-3.01×10^3t、5.00×10^2-7.79×10^2t、7.82×10^3-12.1×10^3t、3.10×10^2-5.02×10^2t、4.79×10^3-7.46×10^3t。空间分辨率对排放的估算有明显的影响,30 m对比500 m、1 km分辨率,500 m对比1 km分辨率卫星的排放差异分别为25.5%-29.6%,35.4%-39.2%和13.1%-13.7%。因此,未来基于卫星遥感估算林火排放时须考虑空间分辨率的影响。

英文摘要：

In this study, the emissions from forest fire in the Da Hinggan Mountains were estimated based on the TM, MODIS, and AVHRR satellite data, with spatial resolutions of 30 m, 500 m, and 1 km, respectively. In addition, the influences of different spatial resolutions on the emission estimation were quantitatively evaluated. Results showed that the discrepancy of burned scar based on different resolution satellite data is about 4.3%-13.8%, and the burned scar decreases with the decrease of spatial resolution. The total emissions range from forest fire for CO2, CO, CH4, nonmethane hydrocarbons （NMHC）, NOx, SO2, PMzs, BC, and OC were 1.01 × 10^6-1.64× 10^6 t, 6.07× 10^4-9.58× 10^4 t, 2.91 × 10^3-4.51 × 10^3 t, 4.61 × 10^3 -7.18× 10^3 t, 1.83 × 10^3-3.01 × 10^3 t, 5.00× 10^-7.79× 10^2 t, 7.82× 10^3-12.1 × 10^3 t, 3.10× 10^2-5.02 × 10^2 t, and 4.79 × 10^3-7.46× 10^3 t, respectively. Furthermore, our study indicates the spatial resolution of the satellite has obvious influence on the emission estimation from forest fire. The discrepancies of the total emissions were about 25.5%-29.6%, 35.2%-39.2%, and 13.1%-13.7% among TM, MODIS, and AVHRR, with resolutions of 30 m, 500 m, and 1 km, respectively. We proposed that the effect of the satellite resolution on the emission estimation from forest fire should be given full consideration in the future.