Bimodal character of accumulation mode aerosol mass distributions in Southern California
Bimodal character of accumulation mode aerosol mass distributions in Southern California
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DOI：
10.1016/s1352-2310(96)00175-6
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发表时间：
1997-01-01
影响因子：
5
通讯作者：
Seinfeld, JH
中科院分区：
文献类型：
--
作者：
Hering, S;Eldering, A;Seinfeld, JH
细颗粒物的化学成分和物理测量细颗粒物的粒度分布在南加州空气质量研究（SCAQS）的尺寸分辨测量进行了比较。使用光学粒子计数器和电子气溶胶分析仪测量了环境气溶胶的数量分布。使用基于环境的校准来减少光学计数器数据。质量粒度分布是根据撞击器测量的粒度分辨化学成分的总和推断的。光学计数器数据减少与基于环境的校准比较以及撞击测量。两组数据均表明，总质量粒度分布的累积模式可能是双峰的。以前在化学物质粒度分布中确定的冷凝和液滴模式在总质量粒度分布中经常很明显。版权所有（C）1996 Elsevier Science Ltd
Size-resolved measurements of fine particle chemical composition and physical measurements of fine particle size distributions obtained during the Southern California Air Quality Study (SCAQS) are compared. Number distributions of the ambient aerosols were measured using optical particle counters and electrical aerosol analyzers. Optical counter data are reduced using an ambient-based calibration. Mass size distributions are inferred from the sum of size-resolved chemical composition as measured by impactors. Optical counter data reduced with an ambient-based calibration compare well to impactor measurements. Both sets of data show that the accumulation mode of the total mass size distribution may be bimodal. Condensation and droplet modes previously identified in chemical species size distributions are Frequently apparent in the total mass size distribution. Copyright (C) 1996 Published by Elsevier Science Ltd