基于光腔衰荡光谱技术的大气气溶胶消光性质研究

J4 ›› 2016, Vol. 33 ›› Issue (3): 348-355.

基于光腔衰荡光谱技术的大气气溶胶消光性质研究

1 上海大学环境与化学工程学院，上海200444 2暨南大学环境安全与污染控制研究所，广东广州 510632 3昆山禾信质谱技术有限公司，江苏昆山 215133

收稿日期:2015-04-14 修回日期:2015-06-01 出版日期:2016-05-28 发布日期:2016-05-27

Characterization of the atmospheric aerosol extinction based on the cavity ring-down spectroscopy.

Received:2015-04-14 Revised:2015-06-01 Published:2016-05-28 Online:2016-05-27

摘要/Abstract

摘要： 通过自主研发的基于光腔衰荡光谱技术的气溶胶消光仪，对昆山的大气气溶胶的消光性质进行观测试验，并研究了相对湿度对气溶胶消光系数的影响。观测结果表明：监测点的大气气溶胶消光系数较高，且日变化在早晨7点出现最高值，至下午17点达到最低值后开始回升，其主要是由气象条件及周边的强污染源的影响造成的。此外，气溶胶亲水特性实验表明，监测点的大气气溶胶多为污染海洋型，受周围环境的相对湿度的影响较大。该研究结果为后期结合气溶胶质谱等其它监测仪器对该地大气气溶胶性质进行进一步观测研究具有一定的指导意义。

Abstract: Homemade laser cavity ring-down spectrometers (CRDS) were used to investigate the aerosol light extinction and the influence caused by relative humidity during a long term experiment around Kunshan. Observation results show that mean value of extinction coefficient is quite high, and a clear diurnal pattern was observed in extinction coefficient with maximum occurring at 7 a.m. and then dropped down to minimum at 5 p.m. The reasons are due to the great influence of the surrounding heavily polluted areas and the meteorological conditions. The observation results for the hydrophilic properties of atmospheric aerosol in the monitoring site show that atmospheric aerosol is hydrophilic type, and extinction coefficient is susceptible to the ambient relative humidity. The results of this study have certain guiding significance for the further study of the atmospheric aerosol properties of this area with aerosol mass spectrometry and other monitoring instruments.

Key words: relative humidity

黄晓郭艳林洪义董俊国高伟李梅黄正旭傅忠程平周振. 基于光腔衰荡光谱技术的大气气溶胶消光性质研究[J]. J4, 2016, 33(3): 348-355.

参考文献

Hallquist M, Wenger J C, Baltensperger U, et al., The formation, properties and impact of secondary organic aerosol:current and emerging issues[J]. Atmospheric Chemistry and Physics, 2009, 9:5155-5236.
[2] Nakayamaa Tomoki, Hagino Rie., Matsumi Yutaka, et al., Measurements of aerosol optical properties in central Tokyo during summertime using cavity ring-down spectroscopy: Comparison with conventional techniques[J]. Atmospheric Environment, 2010, 44:3034-3042.
[3] Stevens B, Untangling aerosol effects on clouds and precipitation in a buffered system[J]. Nature, 2009, 461(7264):607-613.
[4] Ramachandran S, Srivastava S, Kedia R, et al., Contribution of natural and anthropogenic aerosols to optical properties and radiative effects over an urban location[J]. Environmental Research Letters, 2012, 7(3).
[5] IPCC, Climate Change 2013: Box TS.2: Radiative Forcing and Effective Radiative Forcing[J]. 2013, 18-24.
[6] Jiao Yan, Observational Study of PM2.5 Mass Concentration and Aerosol Optical Characteristics in Shanghai Urban Area[D]. Shan Dong: Ocean University of China, 2013 (in Chinese).
[7] Yu Y, Niu S, Zhang H, et al., Regional climate effects of internally and externally mixed aerosols over China[J]. Acta Meteorologica Sinica, 2013, 27(1): 110-118.
[8] Dubovik O, Holben B, Eck T F, et al., Variability of absorption and optical properties of key aerosol types observed in worldwide locations[J]. Journal of the Atmospheric Sciences, 2002, 59(3):590-608.
[9] Andreae M O, Schmid O, Yang H, et al., Optical properties and chemical composition of the atmospheric aerosol in urban Guangzhou, China[J]. Atmospheric Environment, 2008, 42(25):6335-6350.
[10] Malm W C, Day D E, and Kreidenweis S M, Light scattering characteristics of aerosols as a function of relative humidity: Part I-A comparison of measured scattering and aerosol concentrations using the theoretical models[J]. Journal of the Air & Waste Management Association, 2000, 50(5): 686-700.
[11] Heintzenberg J, Wiedensohler A, Tuch T M, et al., Intercomparisons and aerosol calibrations of 12 commercial integrating nephelometers of three manufacturers[J]. Journal of Atmospheric and Oceanic Technology, 2006, 23(7):902-914.
[12] Moosmüller H, Varma R and Arnott W P, Cavity Ring-Down and Cavity-Enhanced Detection Techniques for the Measurement of Aerosol Extinction[J]. Aerosol Science and Technology, 2005, 39(1): 30-39.
[13] Berden G, Rudy P and Meijer G, Cavity ring-down spectroscopy: Experimental schemes and applications[J]. International Reviews in Physical Chemistry, 2000, 19(4):565-607.
[14] Chen H, Winderlich J, Gerbig C, et al., High-accuracy continuous airborne measurements of greenhouse gases (CO2 and CH4) using the cavity ring-down spectroscopy (CRDS) technique[J]. Atmospheric Measurement Techniques, 2010, 3:375-386.
[15] Baynard T, Lovejoy E R, Pettersson A, et al., Design and Application of a Pulsed Cavity Ring-Down Aerosol Extinction Spectrometer for Field Measurements[J]. Aerosol Science and Technology, 2007, 41(4):447-462.
[16] Li L, Chen J, Wang L, et al., Aerosol single scattering albedo affected by chemical composition: An investigation using CRDS combined with MARGA[J]. Atmospheric Research, 2013, 124: 149-157.
[17] Riziq A, Erlick C, Dinar E, et al., Optical properties of absorbing and non-absorbing aerosols retrieved by cavity ring down (CRD) spectroscopy[J]. Atmospheric Chemistry and Physics, 2007, 7:1523-1536.
[18] Huang Cheng, Chen Changhong, Li Li, et al., Anthropogenic air pollutant emission characteristics in the Yangtze River Delta region, China[J]. Acta Scientiae Circumstantiae, 2011, 31(9):1858-1871 (in Chinese).
[19] Quinn P K, Bates T S, Baynard T, et al., Impact of particulate organic matter on the relative humidity dependence of light scattering: A simplified parameterization[J]. Geophysical Research Letters, 2005, 32.
[20] Stock M, Cheng Y F, Birmili W, et al., Hygroscopic properties of atmospheric aerosol particles over the Eastern Mediterranean: implications for regional direct radiative forcing under clean and polluted conditions[J]. Atmospheric Chemistry and Physics, 2011, 11:4251-4271.
[21] Hegg D A, Livingston J, Hobbs P V, et al., Chemical apportionment of aerosol column optical depth off the mid-Atlantic coast of the United States[J]. Journal of Geophysical Research, 1997, 102(D21):25293-25303.
[22] Kotchenruther R A, Hobbs P V and Hegg D A, Humidification factors for atmospheric aerosols off the mid-Atlantic coast of the United States[J]. Journal of Geophysical Research, 1999, 104(D2): 2239-2251.
[23] Massoli P, Bates T S, Quinn P K, et al., Aerosol optical and hygroscopic properties during TexAQS‐GoMACCS 2006 and their impact on aerosol direct radiative forcing[J]. Journal of Geophysical Research, 2009, 114.