Effect of relative air humidity on photoacoustic aerosol absorption measurements in the near-ground atmospheric layer

被引：4
作者：
Kozlov V.S. [1 ]
Panchenko M.V. [1 ]
Tikhomirov A.B. [1 ]
Tikhomirov B.A. [1 ]
Shmargunov V.P. [1 ]
机构：
[1] Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, pl. Akademika Zueva 1, Tomsk
来源：
Atmospheric and Oceanic Optics | 2011年 / 24卷 / 5期
基金：
俄罗斯基础研究基金会;
关键词：
Black Carbon; Atmospheric Aerosol; Aerosol Absorption; Aerosol Filter; Water Vapor Molecule;
D O I：
10.1134/S1024856011050101
中图分类号：
学科分类号：
摘要：
The paper discusses wintertime synchronous near-ground measurements of the aerosol absorption coefficient at wavelengths of 532 and 1064 nm and the black carbon mass concentration by pulsed photoacoustic (PA) spectroscopy and optical aethalometry, respectively. It was found that the signal of the pulsed PA spectrometer decreases monotonically, by 30–40% on average, as the relative air humidity increases from 30 to 90%. Analysis of the data has shown that the PA method is efficient for studying the absorption of laser radiation in the range of low humidity values, i.e., for measurements of the aerosol absorption coefficient of “dry” carbonaceous particles. Correctness of the aerosol absorption measurements for increased relative air humidity (60–90%) can be improved through a sensitivity correction (additional calibration) of PA spectrometers. © 2011, Pleiades Publishing, Ltd.
引用
收藏
页码：487 / 491
页数：4
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