Impact of aerosol liquid water content and its size distribution on hygroscopic growth factor in urban Guangzhou of South China
Copyright © 2021 Elsevier B.V. All rights reserved..
To investigate the dependence of hygroscopic growth factor (f(RH)) on aerosol liquid water content (ALWC) and its size distribution, a comprehensive campaign was carried out in urban Guangzhou in autumn 2015. Major chemical components in bulk as well as size-segregated PM2.5 samples, bulk PM10 mass, aerosol scattering coefficient (bsp) under dry and wet conditions, inline water-soluble inorganic ions (WSIIs) and meteorological parameters were synchronously measured. Mass fractions of hydrophilic chemical composition (e.g. SO42-, NO3- and NH4+) in PM2.5 and their mass median aerodynamic diameters (MMADs) were evidently larger under conditions of ambient relative humidity (RH) >60% than RH <60%. The estimated f(RH) by the revised IMPROVE formula and the Mie model based on filter-collected WSIIs concentrations was higher than and close to the measured ones, respectively, when RH < 60%, but was evidently lower than the measured ones when RH > 60%. A good linear correlation was found between the measured f(RH) and mass ratio of ALWC to PM2.5 when using the inline WSIIs concentrations, suggesting a strong dependence of f(RH) on the mass fraction of ALWC in PM2.5.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:789 |
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| Enthalten in: |
The Science of the total environment - 789(2021) vom: 01. Okt., Seite 148055 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tao, Jun [VerfasserIn] |
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| Links: |
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| Themen: |
Atmospheric aerosols |
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| Anmerkungen: |
Date Revised 22.12.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.scitotenv.2021.148055 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM328684392 |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2021 Elsevier B.V. All rights reserved. | ||
| 520 | |a To investigate the dependence of hygroscopic growth factor (f(RH)) on aerosol liquid water content (ALWC) and its size distribution, a comprehensive campaign was carried out in urban Guangzhou in autumn 2015. Major chemical components in bulk as well as size-segregated PM2.5 samples, bulk PM10 mass, aerosol scattering coefficient (bsp) under dry and wet conditions, inline water-soluble inorganic ions (WSIIs) and meteorological parameters were synchronously measured. Mass fractions of hydrophilic chemical composition (e.g. SO42-, NO3- and NH4+) in PM2.5 and their mass median aerodynamic diameters (MMADs) were evidently larger under conditions of ambient relative humidity (RH) >60% than RH <60%. The estimated f(RH) by the revised IMPROVE formula and the Mie model based on filter-collected WSIIs concentrations was higher than and close to the measured ones, respectively, when RH < 60%, but was evidently lower than the measured ones when RH > 60%. A good linear correlation was found between the measured f(RH) and mass ratio of ALWC to PM2.5 when using the inline WSIIs concentrations, suggesting a strong dependence of f(RH) on the mass fraction of ALWC in PM2.5 | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Atmospheric aerosols | |
| 650 | 4 | |a Empirical model validation | |
| 650 | 4 | |a Hydrophilic chemical composition | |
| 650 | 4 | |a Mass scattering efficiency | |
| 650 | 4 | |a Particle size distribution | |
| 700 | 1 | |a Zhang, Zhisheng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Leiming |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Yunfei |e verfasserin |4 aut | |
| 700 | 1 | |a Fang, Ping |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Boguang |e verfasserin |4 aut | |
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