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北京香子大气碳烯化合物:秋冬变化,臭氧形成潜力和来源分配

Yufei Song¹, Xiaoshuai Gao¹, Junling Li¹

¹State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

|February 26, 2026

概括

大气中的碳化合物 (OVOC) 在秋季比冬季高于背景地点. 甲,乙和乙甲占主导地位,甲是臭氧的主要前体.

科学领域:

大气化学大气化学
环境科学环境科学
空气污染研究研究

背景情况:

挥发性有机化合物 (VOC) 是二次污染物的重要前体.
碳化合物 (OVOCs) 是重要的氧化VOCs,影响大气化学.
了解背景地区的OVOC对于区域空气质量管理至关重要.

研究的目的:

分析24种OVOC的度,季节和日间变化以及臭氧形成潜力 (OFP).
在区域大气背景站确定OVOC的主要来源.
提供有关大气氧化能力的见解,并为污染控制战略提供信息.

主要方法:

在香格里拉区域大气背景站进行持续的现场观测.
对24种碳化合物 (OVOC) 度和OFP的分析.
使用特征比率,相关性分析和多重线性回归来进行源分配.

主要成果:

平均 Σ24OVOCs 度为 2.70 ± 1.55 ppb,主要由甲,乙和乙化.
秋季度 (3.68 ± 1.66 ppb) 是冬季 (1.78 ± 0.58 ppb) 的2.1倍.
甲是主要的臭氧前体 (86.9% OFP),二次形成在秋季显著,人为来源在冬季占主导地位.

结论:

在背景地点的秋季和冬季,OVOC污染的特征在秋季和冬季之间有很大差异.
甲是该地区臭氧形成的关键驱动因素.
人为来源,包括车辆排放和工业排放,是冬季OVOC污染的主要原因.

关键词:

香格里拉的第一天碳烯化合物是一种碳烯化合物.臭氧形成潜力 (OFP) 是一种污染的特点污染的特点源头分析源头分析

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