A Cloud Chamber Study of the Effect That Nonprecipitating Water Clouds Have on the Aerosol Size Distribution
| Autor: | G. M. Frick, William A. Hoppel, B. J. Wattle, James W. Fitzgerald |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
education.field_of_study
Chemistry Population Environmental chamber Cloud physics Mineralogy Atmospheric sciences complex mixtures Pollution law.invention Trace gas Aerosol law Liquid water content Environmental Chemistry Cloud condensation nuclei General Materials Science sense organs Cloud chamber education |
| Zdroj: | Aerosol Science and Technology. 20:1-30 |
| ISSN: | 1521-7388 0278-6826 |
| DOI: | 10.1080/02786829408959660 |
| Popis: | When an air parcel in the atmosphere passes through a nonprecipitating cloud cycle, a subset of the aerosol population called cloud condensation nuclei (CCN) is activated and forms cloud droplets. During the cloud phase, trace gases, such as SO2, are dissolved into the droplets and undergo aqueous phase chemical reactions, forming low-volatility products, such as sulfates, that remain as residue when the cloud droplets evaporate. The resulting increase in residual mass can have a dramatic effect on the aerosol size distribution, causing the CCN to grow relative to the smaller particles (interstitial aerosol) which were not activated in the cloud. This process was graphically demonstrated in a series of experiments carried out in the Calspan 600-m3 environmental chamber, under conditions where the precloud reactants could be carefully controlled. Size distributions taken before and after a cloud cycle showed significant conversion of SO2 to H2SO4 and a dramatic change in the aerosol size distribution. Subs... |
| Databáze: | OpenAIRE |
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