亚北极冬季条件下生物质燃烧对荧光气溶胶颗粒的影响

Kaitlyn M. McKinney, Raghu Betha*, Saravanan Kanagaratnam and Dagen D. Hughes, 
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引用次数: 0

摘要

荧光气溶胶粒子(FAPs)是空气中的粒子,当暴露在特定波长的光下,通常是紫外线或可见光时,会发出荧光。近年来,气溶胶自身荧光的实时测量已被广泛用于研究初级生物气溶胶颗粒(ppap)或生物气溶胶。虽然自身荧光技术为ppap检测提供了更高的时间分辨率,但非生物荧光颗粒的干扰使测量复杂化,特别是在污染环境中。本文研究了生物质燃烧对空气悬浮粒子荧光特性的影响。利用宽带集成生物气溶胶传感器,在阿拉斯加北极进行了FAPs的实时测量。同时使用过滤器测量和其他实时仪器的数据来分析FAP的组成和大小,以评估生物质燃烧的影响。结果表明,在0.75 μm以下,生物质燃烧与特定FAP类型之间存在适度的相关性,其与左旋葡聚糖(一种生物质燃烧示踪剂)相关。研究结果进一步表明,生物质燃烧排放增加了FAP浓度,导致颗粒大小和荧光强度发生统计学上显著的变化。值得注意的是,生物质燃烧似乎推动了特定PBAP浓度的增加,包括潜在的细菌和真菌孢子,这引起了人们对暴露于人为污染物和PBAP水平升高的当地人口健康影响的担忧。这些发现提供了关于亚北极冬季条件下ppap的宝贵数据,强调了寒冷气候下生物质燃烧对环境和公共卫生的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of Biomass Burning on Fluorescent Aerosol Particles in Subarctic Winter Conditions

Influence of Biomass Burning on Fluorescent Aerosol Particles in Subarctic Winter Conditions

Fluorescent aerosol particles (FAPs) are airborne particles that emit fluorescence when exposed to specific wavelengths of light, typically ultraviolet or visible light. In recent times, real-time measurements of aerosol autofluorescence have been widely used to study primary biological aerosol particles (PBAPs) or bioaerosol. Although autofluorescence techniques provide improved temporal resolution for PBAP detection, interference from nonbiological fluorescent particles complicates measurements, particularly in polluted environments. This study investigates the fluorescence properties of airborne particles influenced by biomass burning. Real-time measurements of FAPs were conducted in the North Pole, Alaska, using a wideband integrated bioaerosol sensor. Concurrent filter measurements and data from other real-time instruments were used to analyze FAP composition and size to assess the influence of biomass burning. Results indicate a moderate correlation between biomass burning and specific FAP types below 0.75 μm, evidenced by their association with levoglucosan, a biomass burning tracer. Findings further demonstrate that biomass burning emissions increased FAP concentrations, resulting in statistically significant shifts in particle size and fluorescence intensity. Notably, biomass burning appears to drive increases in specific PBAP concentrations, including potential bacterial and fungal spores, raising concerns over health impacts for local populations exposed to both anthropogenic pollutants and elevated PBAP levels. These findings provide valuable data on PBAPs in subarctic winter conditions, underscoring the environmental and public health implications of biomass burning in cold climates.

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