Condensation particle counters combined with a low-pressure impactor for fast measurement of mode-segregated aerosol number concentration
Condensation particle counters combined with a low-pressure impactor for fast measurement of mode-segregated aerosol number concentration
复制标题
冷凝粒子计数器与低压冲击器相结合，可快速测量模式分离的气溶胶数浓度
DOI：
10.1080/02786826.2013.822462
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and Y. Kondo
中科院分区：
文献类型：
--
作者：
Takegawa;N.;N. Moteki;M. Koike;N. Oshima;and Y. Kondo
An integrated airborne system comprising two condensation particle counters (CPCs, models 3771 and 3772, TSI Inc.) and a low-pressure impactor (LPI) has been developed (LPI-CPCs) for fast measurement of mode-segregated aerosol number concentration. The CPC 3771 is connected to the LPI to measure aerosol number concentrations below 0.17 μm in aerodynamic diameter, while the CPC 3772 directly measures the total aerosol number concentration. The former approximately corresponds to the Aitken mode fraction of the aerosol number concentration. The key concept is that the cutoff diameter of the LPI (aerodynamic diameter at which the transmission efficiency is 50%) is controlled by simultaneously modifying the pressure and flow rate through the LPI. The instrument was deployed onboard the King Air B200T aircraft during the Aerosol Radiative Forcing in East Asia (A-FORCE) conducted over the western Pacific in the spring of 2009. The results from the aircraft measurements, together with those from laboratory experiments, are used to demonstrate the in-flight performance of the instrument. We propose that fast airborne measurement of mode-segregated aerosols by LPI-CPCs is useful for a better understanding of the variability of aerosol number concentration in the troposphere.Copyright 2013 American Association for Aerosol Research
