Deterioration of air quality due to the increase in atmospheric emissions from biomass burning (BB) is one of the major environmental problems worldwide. In this study, we estimated the contributions of BB to PM_2.5 concentrations in the municipalities of Soledad and Malambo located in the Colombian Caribbean. The evaluation period ranged from February 24 to March 30, 2018, a period with a high number of BB events recorded in the surroundings of the evaluated sites. The contribution of BB to the two sampling sites was estimated using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) dispersion model with forwarding trajectories from each of the burning points identified by satellite images (n = 1089). The PM_2.5 emissions were determined using the fire radiative power (FRP), obtained by remote-sensing data, and corresponded to the radiant energy released per time unit by burning vegetation. The average PM_2.5 concentrations during the evaluation period were 19.91 μg/m³ for Soledad and 22.44 μg/m³ for Malambo. The average contribution of BB to these municipalities was 22.8% and 28.8%, respectively. The methodology used in this study allowed to estimate the contribution of this important source without knowledge of a previous tracer of BB, thereby increasing the use of the proposed procedure worldwide. This information would enable the implementation of effective mitigation, thereby diminishing the adverse impact of PM_2.5 on the health of the population.

由于生物质燃烧 (BB) 引起的大气排放增加，空气质量恶化是世界范围内的主要环境问题之一。在这项研究中，我们估计了 BB 对位于哥伦比亚加勒比地区的索莱达和马兰博市PM _2.5浓度的贡献。评价期为2018年2月24日至3月30日，该时期为评价点周边BB事件较多的时期。BB 对两个采样点的贡献是使用混合单粒子拉格朗日综合轨迹 (HYSPLIT) 色散模型估算的，该模型具有来自卫星图像识别的每个燃烧点的前向轨迹 ( n  = 1089)。PM _2.5排放量是使用火辐射功率 (FRP) 确定的，该辐射功率是通过遥感数据获得的，对应于燃烧植被每时间单位释放的辐射能。评估期间的平均 PM _2.5浓度为 Soledad 19.91 μg/m ³和Malambo 22.44 μg/m ³。BB 对这些直辖市的平均贡献分别为 22.8% 和 28.8%。本研究中使用的方法允许在不了解 BB 先前示踪剂的情况下估计这一重要来源的贡献，从而在全球范围内增加所提议程序的使用。这些信息将有助于实施有效的缓解措施，从而减少 PM _2.5的不利影响 关乎人民健康。