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使用TC-BC方法从野火中高时间分辨率分配碳酸性气溶:营火2018年案例研究

Matic Ivančič¹, Martin Rigler¹, Bálint Alföldy¹

¹Aerosol d.o.o., SI-1000 Ljubljana, Slovenia.

|June 27, 2023

概括

2018年的野火烟雾严重影响了伯克利的空气质量,增加了黑碳 (BC) 和有机碳 (OC) 水平. 在野火事件期间观察到气溶老化和二次碳形成.

科学领域:

大气化学大气化学
空气质量监测空气质量监测
野火影响研究野火影响研究

背景情况:

2018年的野火造成了广泛的烟雾,影响了整个北加州的空气质量和人类健康.
评估野火烟雾的远程运输和大气影响对于了解空气质量至关重要.
碳气溶是野火烟雾的关键组成部分,影响空气质量和气候.

研究的目的:

为了分析野火烟雾对伯克利空气质量的影响,一个距离200公里的地方.
为了调查野火事件期间碳酸性气溶特性演变的过程.
了解有机碳 (OC) 气溶的老化过程.

主要方法:

进行了总碳 (TC),黑碳 (BC) 和有机碳 (OC) 的高时间分辨率测量.
使用了碳气溶分类系统 (CASS),包括总碳分析仪 (TCA08) 和乙醇计 (AE33).
在伯克利进行了测量,以捕捉来自野火的烟雾的影响.

主要成果:

与基线水平相比,黑碳 (BC) 度增加了四倍,有机碳 (OC) 度增加了十倍.
高时分辨率数据使得在火灾期间研究OC老化和气溶演变成为可能.
在火灾的后期阶段检测到的二次碳酸性气溶的比例更大,而棕色碳则减少.

结论:

坎普火灾的烟雾严重降低了伯克利的空气质量,BC和OC的空气质量大幅增加.
该研究突出了野火事件期间碳酸性气溶成分和衰老的动态变化.
了解这些气溶演变过程对于空气质量管理和健康风险评估至关重要.

关键词:

碳黑是一种碳黑.棕色碳是一种棕色碳.碳酸性气溶是一种碳酸性气溶.二次有机气溶是二次有机气溶.野火野火是一场野火.

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