Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development
The physical and optical properties of an atmospheric aerosol mixture depend on a number of factors. The relative humidity influences the size of hydroscopic particles and the effective radius of an aerosol mixture. In consequence, values of the aerosol extinction, the aerosol optical thickness and...
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| Format: | Article |
| Language: | English |
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Elsevier
2009-03-01
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| Series: | Oceanologia |
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| Online Access: | http://www.iopan.gda.pl/oceanologia/51_1.html#A1 |
| _version_ | 1818154992999071744 |
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| author | Jolanta Kuśmierczyk-Michulec |
| author_facet | Jolanta Kuśmierczyk-Michulec |
| author_sort | Jolanta Kuśmierczyk-Michulec |
| collection | DOAJ |
| description | The physical and optical properties of an atmospheric aerosol mixture depend on a number of factors. The relative humidity influences the size of hydroscopic particles and the effective radius of an aerosol mixture. In consequence, values of the aerosol extinction, the aerosol optical thickness and the Ångström coefficient are modified. A similar effect is observed when the aerosol composition changes. A higher content of small aerosol particles causes the effective radius of an aerosol mixture to decrease and the Ångström coefficient to increase. Both effects are analysed in this paper. The parameters of the size distribution and the type of components used to represent natural atmospheric aerosol mixtures are based on experimental data. The main components are sea-salts (SSA), anthropogenic salts (WS, e.g. NH<sub>4</sub>HSO<sub>4</sub>, NH<sub>4</sub>NO<sub>3</sub>, (NH<sub>4</sub><sub>2</sub> SO<sub>4</sub>), organic carbon (OC) and black carbon (BC). The aerosol optical thickness is modelled using the external mixing approach. The influence of relative humidity on the optical and physical properties of the following aerosol mixtures is investigated: (SSA & WS), (SSA & OC), (SSA & BC), (SSA, WS & OC) and (WS, OC & BC). It is demonstrated that the Ängström coefficient can be used as a rough indicator of the aerosol type. |
| first_indexed | 2024-12-11T14:35:20Z |
| format | Article |
| id | doaj.art-fe00b88839d0437091a6d00fddd08807 |
| institution | Directory Open Access Journal |
| issn | 0078-3234 |
| language | English |
| last_indexed | 2024-12-11T14:35:20Z |
| publishDate | 2009-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Oceanologia |
| spelling | doaj.art-fe00b88839d0437091a6d00fddd088072022-12-22T01:02:14ZengElsevierOceanologia0078-32342009-03-01511538Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model developmentJolanta Kuśmierczyk-MichulecThe physical and optical properties of an atmospheric aerosol mixture depend on a number of factors. The relative humidity influences the size of hydroscopic particles and the effective radius of an aerosol mixture. In consequence, values of the aerosol extinction, the aerosol optical thickness and the Ångström coefficient are modified. A similar effect is observed when the aerosol composition changes. A higher content of small aerosol particles causes the effective radius of an aerosol mixture to decrease and the Ångström coefficient to increase. Both effects are analysed in this paper. The parameters of the size distribution and the type of components used to represent natural atmospheric aerosol mixtures are based on experimental data. The main components are sea-salts (SSA), anthropogenic salts (WS, e.g. NH<sub>4</sub>HSO<sub>4</sub>, NH<sub>4</sub>NO<sub>3</sub>, (NH<sub>4</sub><sub>2</sub> SO<sub>4</sub>), organic carbon (OC) and black carbon (BC). The aerosol optical thickness is modelled using the external mixing approach. The influence of relative humidity on the optical and physical properties of the following aerosol mixtures is investigated: (SSA & WS), (SSA & OC), (SSA & BC), (SSA, WS & OC) and (WS, OC & BC). It is demonstrated that the Ängström coefficient can be used as a rough indicator of the aerosol type.http://www.iopan.gda.pl/oceanologia/51_1.html#A1Ångström coefficientEffective radiusAtmospheric aerosol mixtureAerosol compositionAerosol type |
| spellingShingle | Jolanta Kuśmierczyk-Michulec Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development Oceanologia Ångström coefficient Effective radius Atmospheric aerosol mixture Aerosol composition Aerosol type |
| title | Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development |
| title_full | Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development |
| title_fullStr | Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development |
| title_full_unstemmed | Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development |
| title_short | Ångström coefficient as an indicator of the atmospheric aerosol type for a well-mixed atmospheric boundary layer: Part 1: Model development |
| title_sort | angstrom coefficient as an indicator of the atmospheric aerosol type for a well mixed atmospheric boundary layer part 1 model development |
| topic | Ångström coefficient Effective radius Atmospheric aerosol mixture Aerosol composition Aerosol type |
| url | http://www.iopan.gda.pl/oceanologia/51_1.html#A1 |
| work_keys_str_mv | AT jolantakusmierczykmichulec angstromcoefficientasanindicatoroftheatmosphericaerosoltypeforawellmixedatmosphericboundarylayerpart1modeldevelopment |