On the formation of radiation fogs under heavily polluted conditions

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...

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Main Authors: H. Kokkola, S. Romakkaniemi, A. Laaksonen
Format: Article
Language:English
Published: Copernicus Publications 2003-01-01
Series:Atmospheric Chemistry and Physics
Online Access:http://www.atmos-chem-phys.net/3/581/2003/acp-3-581-2003.pdf
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spelling doaj-ff3b5eb36fa345a29752289c207abc562020-11-25T01:36:20ZengCopernicus 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
collection DOAJ
language English
format Article
sources DOAJ
author H. Kokkola
S. Romakkaniemi
A. Laaksonen
spellingShingle H. Kokkola
S. Romakkaniemi
A. Laaksonen
On the formation of radiation fogs under heavily polluted conditions
Atmospheric Chemistry and Physics
author_facet H. Kokkola
S. Romakkaniemi
A. Laaksonen
author_sort H. Kokkola
title On the formation of radiation fogs under heavily polluted conditions
title_short 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_sort on the formation of radiation fogs under heavily polluted conditions
publisher Copernicus Publications
series Atmospheric Chemistry and Physics
issn 1680-7316
1680-7324
publishDate 2003-01-01
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.
url http://www.atmos-chem-phys.net/3/581/2003/acp-3-581-2003.pdf
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AT sromakkaniemi ontheformationofradiationfogsunderheavilypollutedconditions
AT alaaksonen ontheformationofradiationfogsunderheavilypollutedconditions
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