Heterogeneous Reaction Rate of Cloud and Fog Droplets
{'Code': '06020104', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'AGS', 'LongName': 'Div Atmospheric & Geospace Sciences'}}
{'SignBlockName': 'Jarvis L. Moyers', 'PO_EMAI': None, 'PO_PHON': None}
Heterogeneous reaction pathways involving water droplets in                 clouds and fogs are increasingly seen as important conduits for                 chemical transformation of atmospheric trace gases.  One of the basic           parameters which determines the transfer rate of trace gases into               atmospheric droplets is the mass accommodation or "sticking"                    coefficient for trace gas molecules on aqueous surfaces.                            This continuation research project, initiated under grant                   ATM-8400748, is designed to study certain heterogeneous chemical                processes of atmospheric importance.  In particular, the variation of           sticking coefficients with droplet physical parameters such as                  temperature and size and chemical parameters including hydrocarbon              surface layers and droplet chemical composition will be                         investigated.  These studies will broaden the applicability of our              measurements to the natural atmosphere.  Chemical reaction kinetics             at the droplet surface will also be measured using this technique in            order to determine whether bulk aqueous reaction rates are                      appropriate for modeling heterogeneous processes in clouds and fogs.            Techniques for real-time droplet surface analysis such as stimulated            Raman scattering and laser induced fluorescence will be developed.
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[{'Code': '1524', 'Text': 'Atmospheric Chemistry'}, {'Code': '9120', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
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