Sablan Olivia, Ford Bonne, Gargulinski Emily, Hammer Melanie S, Henery Giovanna, Kondragunta Shobha, Martin Randall V, Rosen Zoey, Slater Kellin, van Donkelaar Aaron, Zhang Hai, Soja Amber J, Magzamen Sheryl, Pierce Jeffrey R, Fischer Emily V
Department of Atmospheric Science Colorado State University Fort Collins CO USA.
National Institute of Aerospace Hampton VA USA.
Geohealth. 2024 Mar 28;8(4):e2023GH000982. doi: 10.1029/2023GH000982. eCollection 2024 Apr.
Prescribed fires (fires intentionally set for mitigation purposes) produce pollutants, which have negative effects on human and animal health. One of the pollutants produced from fires is fine particulate matter (PM). The Flint Hills (FH) region of Kansas experiences extensive prescribed burning each spring (March-May). Smoke from prescribed fires is often understudied due to a lack of monitoring in the rural regions where prescribed burning occurs, as well as the short duration and small size of the fires. Our goal was to attribute PM concentrations to the prescribed burning in the FH. To determine PM increases from local burning, we used low-cost PM sensors (PurpleAir) and satellite observations. The FH were also affected by smoke transported from fires in other regions during 2022. We separated the transported smoke from smoke from fires in eastern Kansas. Based on data from the PurpleAir sensors, we found the 24-hr median PM to increase by 3.0-5.3 μg m (based on different estimates) on days impacted by smoke from fires in the eastern Kansas region compared to days unimpacted by smoke. The FH region was the most impacted by smoke PM compared to other regions of Kansas, as observed in satellite products and in situ measurements. Additionally, our study found that hourly PM estimates from a satellite-derived product aligned with our ground-based measurements. Satellite-derived products are useful in rural areas like the FH, where monitors are scarce, providing important PM estimates.
规定火烧（出于减灾目的故意引发的火灾）会产生污染物，这些污染物会对人类和动物健康产生负面影响。火灾产生的污染物之一是细颗粒物（PM）。堪萨斯州的弗林特山（FH）地区每年春天（3月至5月）都会进行大规模的规定火烧。由于规定火烧发生的农村地区缺乏监测，以及火灾持续时间短、规模小，规定火烧产生的烟雾往往未得到充分研究。我们的目标是确定弗林特山地区PM浓度与规定火烧之间的关系。为了确定当地火烧导致的PM增加情况，我们使用了低成本的PM传感器（PurpleAir）和卫星观测数据。2022年期间，弗林特山地区还受到了其他地区火灾产生的烟雾的影响。我们将外来传输的烟雾与堪萨斯州东部火灾产生的烟雾区分开来。根据PurpleAir传感器的数据，我们发现，与未受烟雾影响的日子相比，在受堪萨斯州东部地区火灾烟雾影响的日子里，24小时PM中位数增加了3.0 - 5.3微克/立方米（基于不同的估计）。正如卫星产品和实地测量所显示的那样，与堪萨斯州的其他地区相比，弗林特山地区受烟雾PM的影响最大。此外，我们的研究发现，卫星衍生产品的每小时PM估计值与我们的地面测量结果一致。卫星衍生产品在像弗林特山这样监测设备稀少的农村地区很有用，能提供重要的PM估计值。
