Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer

Jiacheng Zhou; Xuezhe Xu; Weixiong Zhao; Bo Fang; Qianqian Liu; Yuanqing Cai; Weijun Zhang; Dean S. Venables; Weidong Chen

doi:10.5194/amt-13-2623-2020

Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer

Jiacheng Zhou
, Xuezhe Xu
, Weixiong Zhao
, Bo Fang
, Qianqian Liu
, Yuanqing Cai
, Weijun Zhang
, Dean S. Venables
, Weidong Chen

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Hygroscopic aerosols take up water and grow with increasing relative humidity (RH), giving rise to large changes in light extinction (<span classCombining double low line"inline-formula">bext</span>), scattering (<span classCombining double low line"inline-formula">bscat</span>), absorption (<span classCombining double low line"inline-formula">babs</span>), and single scattering albedo (SSA, <span classCombining double low line"inline-formula">ω</span>). The optical hygroscopic growth factors for each parameter (<span classCombining double low line"inline-formula">f</span>(RH)<span classCombining double low line"inline-formula"><math xmlnsCombining double low line"http://www.w3.org/1998/Math/MathML" idCombining double low line"M6" displayCombining double low line"inline" overflowCombining double low line"scroll" dspmathCombining double low line"mathml"><msub><mi/><mrow><mi mathvariantCombining double low line"normal">ext</mi><mo>,</mo><mi mathvariantCombining double low line"normal">scat</mi><mo>,</mo><mi mathvariantCombining double low line"normal">abs</mi><mo>,</mo><mi mathvariantCombining double low line"italic">ω</mi></mrow></msub></math><span><svg:svg xmlns:svgCombining double low line"http://www.w3.org/2000/svg" widthCombining double low line"53pt" heightCombining double low line"9pt" classCombining double low line"svg-formula" dspmathCombining double low line"mathimg" md5hashCombining double low line"cfea950a1a8bdce1f15e2cc43896b508"><svg:image xmlns:xlinkCombining double low line"http://www.w3.org/1999/xlink" xlink:hrefCombining double low line"amt-13-2623-2020-ie00001.svg" widthCombining double low line"53pt" heightCombining double low line"9pt" srcCombining double low line"amt-13-2623-2020-ie00001.png"/></svg:svg></span></span>) are thus important for assessing aerosol effects on regional air quality, atmospheric visibility, and radiative forcing. The RH dependence of aerosol scattering and extinction has been studied in many laboratory and field studies. However, owing partly to the absence of suitable instrumentation, there are few reports of the RH dependence of aerosol absorption and <span classCombining double low line"inline-formula">ω</span>. In this work, we report the development of a humidified cavity-enhanced albedometer (H-CEA) for simultaneous measurements of <span classCombining double low line"inline-formula">f</span>(RH)<span classCombining double low line"inline-formula"><math xmlnsCombining double low line"http://www.w3.org/1998/Math/MathML" idCombining double low line"M9" displayCombining double low line"inline" overflowCombining double low line"scroll" dspmathCombining double low line"mathml"><msub><mi/><mrow><mi mathvariantCombining double low line"normal">ext</mi><mo>,</mo><mi mathvariantCombining double low line"normal">scat</mi><mo>,</mo><mi mathvariantCombining double low line"normal">abs</mi><mo>,</mo><mi mathvariantCombining double low line"italic">ω</mi></mrow></msub></math><span><svg:svg xmlns:svgCombining double low line"http://www.w3.org/2000/svg" widthCombining double low line"53pt" heightCombining double low line"9pt" classCombining double low line"svg-formula" dspmathCombining double low line"mathimg" md5hashCombining double low line"d70df17a9350fc524c322e6bec352418"><svg:image xmlns:xlinkCombining double low line"http://www.w3.org/1999/xlink" xlink:hrefCombining double low line"amt-13-2623-2020-ie00002.svg" widthCombining double low line"53pt" heightCombining double low line"9pt" srcCombining double low line"amt-13-2623-2020-ie00002.png"/></svg:svg></span></span> at <span classCombining double low line"inline-formula">λCombining double low line532</span> nm from 10 % to 88 % RH. The instrument's performance was evaluated with laboratory-generated ammonium sulfate, sodium chloride, and nigrosin aerosols. Measured hygroscopic growth factors for different parameters were in good agreement with model calculations and literature-reported values, demonstrating the accuracy of the H-CEA for measuring RH-dependent optical properties.

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Original language	English
Article number	143
Pages (from-to)	2623-2634
Number of pages	12
Journal	Atmospheric Measurement Techniques
Volume	13
Issue number	5
DOIs	https://doi.org/10.5194/amt-13-2623-2020
Publication status	Published - 20 May 2020

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10.5194/amt-13-2623-2020

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Zhou, J., Xu, X., Zhao, W., Fang, B., Liu, Q., Cai, Y., Zhang, W., Venables, D. S., & Chen, W. (2020). Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer. Atmospheric Measurement Techniques, 13(5), 2623-2634. Article 143. https://doi.org/10.5194/amt-13-2623-2020

@article{168642eb83bc4106b666afacbc2b678d,

title = "Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer",

abstract = "Hygroscopic aerosols take up water and grow with increasing relative humidity (RH), giving rise to large changes in light extinction (bext), scattering (bscat), absorption (babs), and single scattering albedo (SSA, ω). The optical hygroscopic growth factors for each parameter (f(RH)ext,scat,abs,ω) are thus important for assessing aerosol effects on regional air quality, atmospheric visibility, and radiative forcing. The RH dependence of aerosol scattering and extinction has been studied in many laboratory and field studies. However, owing partly to the absence of suitable instrumentation, there are few reports of the RH dependence of aerosol absorption and ω. In this work, we report the development of a humidified cavity-enhanced albedometer (H-CEA) for simultaneous measurements of f(RH)ext,scat,abs,ω at λCombining double low line532\ nm from 10\ \% to 88\ \% RH. The instrument's performance was evaluated with laboratory-generated ammonium sulfate, sodium chloride, and nigrosin aerosols. Measured hygroscopic growth factors for different parameters were in good agreement with model calculations and literature-reported values, demonstrating the accuracy of the H-CEA for measuring RH-dependent optical properties..",

author = "Jiacheng Zhou and Xuezhe Xu and Weixiong Zhao and Bo Fang and Qianqian Liu and Yuanqing Cai and Weijun Zhang and Venables, \{Dean S.\} and Weidong Chen",

note = "Publisher Copyright: {\textcopyright} Author(s) 2020.",

year = "2020",

month = may,

day = "20",

doi = "10.5194/amt-13-2623-2020",

language = "English",

volume = "13",

pages = "2623--2634",

journal = "Atmospheric Measurement Techniques",

issn = "1867-1381",

publisher = "Copernicus Publications",

number = "5",

}

Zhou, J, Xu, X, Zhao, W, Fang, B, Liu, Q, Cai, Y, Zhang, W, Venables, DS & Chen, W 2020, 'Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer', Atmospheric Measurement Techniques, vol. 13, no. 5, 143, pp. 2623-2634. https://doi.org/10.5194/amt-13-2623-2020

Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer. / Zhou, Jiacheng; Xu, Xuezhe; Zhao, Weixiong et al.
In: Atmospheric Measurement Techniques, Vol. 13, No. 5, 143, 20.05.2020, p. 2623-2634.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer

AU - Zhou, Jiacheng

AU - Xu, Xuezhe

AU - Zhao, Weixiong

AU - Fang, Bo

AU - Liu, Qianqian

AU - Cai, Yuanqing

AU - Zhang, Weijun

AU - Venables, Dean S.

AU - Chen, Weidong

PY - 2020/5/20

Y1 - 2020/5/20

N2 - Hygroscopic aerosols take up water and grow with increasing relative humidity (RH), giving rise to large changes in light extinction (bext), scattering (bscat), absorption (babs), and single scattering albedo (SSA, ω). The optical hygroscopic growth factors for each parameter (f(RH)ext,scat,abs,ω) are thus important for assessing aerosol effects on regional air quality, atmospheric visibility, and radiative forcing. The RH dependence of aerosol scattering and extinction has been studied in many laboratory and field studies. However, owing partly to the absence of suitable instrumentation, there are few reports of the RH dependence of aerosol absorption and ω. In this work, we report the development of a humidified cavity-enhanced albedometer (H-CEA) for simultaneous measurements of f(RH)ext,scat,abs,ω at λCombining double low line532 nm from 10 % to 88 % RH. The instrument's performance was evaluated with laboratory-generated ammonium sulfate, sodium chloride, and nigrosin aerosols. Measured hygroscopic growth factors for different parameters were in good agreement with model calculations and literature-reported values, demonstrating the accuracy of the H-CEA for measuring RH-dependent optical properties..

AB - Hygroscopic aerosols take up water and grow with increasing relative humidity (RH), giving rise to large changes in light extinction (bext), scattering (bscat), absorption (babs), and single scattering albedo (SSA, ω). The optical hygroscopic growth factors for each parameter (f(RH)ext,scat,abs,ω) are thus important for assessing aerosol effects on regional air quality, atmospheric visibility, and radiative forcing. The RH dependence of aerosol scattering and extinction has been studied in many laboratory and field studies. However, owing partly to the absence of suitable instrumentation, there are few reports of the RH dependence of aerosol absorption and ω. In this work, we report the development of a humidified cavity-enhanced albedometer (H-CEA) for simultaneous measurements of f(RH)ext,scat,abs,ω at λCombining double low line532 nm from 10 % to 88 % RH. The instrument's performance was evaluated with laboratory-generated ammonium sulfate, sodium chloride, and nigrosin aerosols. Measured hygroscopic growth factors for different parameters were in good agreement with model calculations and literature-reported values, demonstrating the accuracy of the H-CEA for measuring RH-dependent optical properties..

UR - https://www.scopus.com/pages/publications/85085506335

U2 - 10.5194/amt-13-2623-2020

DO - 10.5194/amt-13-2623-2020

M3 - Article

AN - SCOPUS:85085506335

SN - 1867-1381

VL - 13

SP - 2623

EP - 2634

JO - Atmospheric Measurement Techniques

JF - Atmospheric Measurement Techniques

IS - 5

M1 - 143

ER -

Simultaneous measurements of the relative-humidity-dependent aerosol light extinction, scattering, absorption, and single-scattering albedo with a humidified cavity-enhanced albedometer

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