EFFECT OF OXIDATION ON ACIDIFICATION OF CLOUD DROPLET IN CONDENSATIONAL GROWTH

EFFECT OF OXIDATION ON ACIDIFICATION OF CLOUD DROPLET IN CONDENSATIONAL GROWTH

In order to investigate the effect of the drop-phase oxidation due to rainout (in cloud scavenging) of gaseous air pollutants on the acidification of cloud droplets, the characteristics of the acidification of a growing cloud droplet by the rainout of SO2 (g) are simulated numerically with use of a...

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Veröffentlicht in:PROCEEDINGS OF HYDRAULIC ENGINEERING 2001/02/10, Vol.45, pp.277-282
Hauptverfasser: SHIBA, Sadataka, HIRATA, Yushi, YAGI, Shunsaku
Format: Artikel
Sprache:eng
Schlagworte:
Acid rain
Acidification of Cloud droplet
Condensation of water vapor
Mathematical model
Oxidation
Rainout of sulfur dioxide
Water cycle
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container_title PROCEEDINGS OF HYDRAULIC ENGINEERING
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creator SHIBA, Sadataka
HIRATA, Yushi
YAGI, Shunsaku
description In order to investigate the effect of the drop-phase oxidation due to rainout (in cloud scavenging) of gaseous air pollutants on the acidification of cloud droplets, the characteristics of the acidification of a growing cloud droplet by the rainout of SO2 (g) are simulated numerically with use of a mathematical model based on physicochemical consideration.(NH4) 2SO4is selected for the cloud condensation nucleus (CCN), which is a major aerosol and produced from NH3 (g) and SO2 (g) via gas-phase chemical reaction in the atmosphere. With use of the model the droplet radius and the concentrations of chemicals are simulated. It is shown that with lapse of time the hydrogen ion concentration continues to increase beyond the equilibrium concentration (obtained in the case without the oxidation) and that a plateau appears in the concentration profile.
doi_str_mv 10.2208/prohe.45.277
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source J-STAGE Free; Freely Accessible Japanese Titles; Alma/SFX Local Collection
subjects Acid rain
Acidification of Cloud droplet
Condensation of water vapor
Mathematical model
Oxidation
Rainout of sulfur dioxide
Water cycle
title EFFECT OF OXIDATION ON ACIDIFICATION OF CLOUD DROPLET IN CONDENSATIONAL GROWTH
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