On the formation of radiation fogs under heavily polluted conditions
We have studied the effect of gaseous pollutants on fog droplet growth in heavily polluted air using a model that describes time-dependent sulfate production in the liquid phase and thermodynamical equilibrium between the droplets and the gas phase. Our research indicates that the oxidation of SO...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2003-01-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/3/581/2003/acp-3-581-2003.pdf |
| _version_ | 1818119136789659648 |
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| author | H. Kokkola S. Romakkaniemi A. Laaksonen |
| author_facet | H. Kokkola S. Romakkaniemi A. Laaksonen |
| author_sort | H. Kokkola |
| collection | DOAJ |
| description | We have studied the effect of gaseous pollutants on fog droplet growth in heavily polluted air using a model that describes time-dependent sulfate production in the liquid phase and thermodynamical equilibrium between the droplets and the gas phase. Our research indicates that the oxidation of SO<sub>2</sub> to sulfate has a significant effect on fog droplet growth especially when hygroscopic trace gases, for example HNO<sub>3</sub> and NH<sub>3</sub> are present. The increased sulfate production by dissolution of hygroscopic gases results from increased pH (caused by absorption of ammonia) and from the increased size of the fog/smog droplets. Our results indicate that unactivated fogs may become optically very thick when the droplet concentrations are on the order of several thousand per cubic centimeter of air. |
| first_indexed | 2024-12-11T05:05:24Z |
| format | Article |
| id | doaj.art-ff3b5eb36fa345a29752289c207abc56 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T05:05:24Z |
| publishDate | 2003-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-ff3b5eb36fa345a29752289c207abc562022-12-22T01:20:02ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242003-01-0133581589On the formation of radiation fogs under heavily polluted conditionsH. KokkolaS. RomakkaniemiA. LaaksonenWe have studied the effect of gaseous pollutants on fog droplet growth in heavily polluted air using a model that describes time-dependent sulfate production in the liquid phase and thermodynamical equilibrium between the droplets and the gas phase. Our research indicates that the oxidation of SO<sub>2</sub> to sulfate has a significant effect on fog droplet growth especially when hygroscopic trace gases, for example HNO<sub>3</sub> and NH<sub>3</sub> are present. The increased sulfate production by dissolution of hygroscopic gases results from increased pH (caused by absorption of ammonia) and from the increased size of the fog/smog droplets. Our results indicate that unactivated fogs may become optically very thick when the droplet concentrations are on the order of several thousand per cubic centimeter of air.http://www.atmos-chem-phys.net/3/581/2003/acp-3-581-2003.pdf |
| spellingShingle | H. Kokkola S. Romakkaniemi A. Laaksonen On the formation of radiation fogs under heavily polluted conditions Atmospheric Chemistry and Physics |
| title | On the formation of radiation fogs under heavily polluted conditions |
| title_full | On the formation of radiation fogs under heavily polluted conditions |
| title_fullStr | On the formation of radiation fogs under heavily polluted conditions |
| title_full_unstemmed | On the formation of radiation fogs under heavily polluted conditions |
| title_short | On the formation of radiation fogs under heavily polluted conditions |
| title_sort | on the formation of radiation fogs under heavily polluted conditions |
| url | http://www.atmos-chem-phys.net/3/581/2003/acp-3-581-2003.pdf |
| work_keys_str_mv | AT hkokkola ontheformationofradiationfogsunderheavilypollutedconditions AT sromakkaniemi ontheformationofradiationfogsunderheavilypollutedconditions AT alaaksonen ontheformationofradiationfogsunderheavilypollutedconditions |