Agricultural fires are a major source of biomass-burning organic aerosols (BBOAs) with impacts on health, the environment, and climate. In this study, globally relevant BBOA emissions from the combustion of sugar cane in both field and laboratory experiments were analyzed using comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry. The derived chemical fingerprints of fresh emissions were evaluated using targeted and nontargeted evaluation approaches. The open-field sugar cane burning experiments revealed the high chemical complexity of combustion emissions, including compounds derived from the pyrolysis of (hemi)cellulose, lignin, and further biomass, such as pyridine and oxime derivatives, methoxyphenols, and methoxybenzenes, as well as triterpenoids. In comparison, laboratory experiments could only partially model the complexity of real combustion events. Our results showed high variability between the conducted field and laboratory experiments, which we, among others, discuss in terms of differences in combustion conditions, fuel composition, and atmospheric processing. We conclude that both field and laboratory studies have their merits and should be applied complementarily. While field studies under real-world conditions are essential to assess the general impact on air quality, climate, and environment, laboratory studies are better suited to investigate specific emissions of different biomass types under controlled conditions.

中文翻译：

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甘蔗燃烧产生的生物质燃烧有机气溶胶的化学指纹图谱：现场和实验室研究的补充发现

农业火灾是生物质燃烧有机气溶胶 (BBOA) 的主要来源，对健康、环境和气候产生影响。在这项研究中，使用综合二维气相色谱飞行时间质谱分析了现场和实验室实验中甘蔗燃烧产生的全球相关BBOA排放。使用目标和非目标评估方法对新鲜排放物的衍生化学指纹进行评估。露天甘蔗燃烧实验揭示了燃烧排放物的高度化学复杂性，包括来自（半）纤维素、木质素和其他生物质热解的化合物，例如吡啶和肟衍生物、甲氧基苯酚和甲氧基苯，以及三萜类化合物。相比之下，实验室实验只能部分模拟真实燃烧事件的复杂性。我们的结果表明，进行的现场实验和实验室实验之间存在很大的差异，我们除其他外，还根据燃烧条件、燃料成分和大气处理的差异进行了讨论。我们的结论是，现场研究和实验室研究都有其优点，应该互补应用。虽然现实条件下的实地研究对于评估对空气质量、气候和环境的总体影响至关重要，但实验室研究更适合调查受控条件下不同生物质类型的具体排放量。