|
<br />Finnegan, W. G., and R. L. Piner, 1990: Ice phase induced chemical reactions. Preprints, Conference on
<br />Clouq Physics, San Francisco, CA, July 23-27. 1990. American Meteorological Society, Boston. MA,
<br />473-474.
<br />
<br />No abstract.
<br />
<br />Finnegan. W. G., and R. L. Piner, 1989: Another role for CCN in clouds. Preprints, Symposium on the Role of
<br />Clouds in Atmospheric Chemistry and Global Climate, Anaheim, CA, January 30-February 3, 1989.
<br />American Meteorological Society, Boston, MA, 104-105.
<br />
<br />No abstract.
<br />
<br />Finnegan, W. G.. R. L. Piner, and L. G. Young, 1989: Experimental study of coupled oxidation-reduction
<br />reactions of soluble ionic aerosol constituents in growing ice crystals. Annual Meeting, AAAR. Sparks,
<br />NV, October 9-13. 1989. American Association for Aerosol Research, Washington. DC. 142.
<br />
<br />No abstract.
<br />
<br />Finnegan, W. G., R. L. Piner, and L. G. Young, 1989: Reductiion-oxidation (REDOX) reactions in growing ice
<br />crystals. Proceedings. 5th WMO Scientific Conference on Weather Modification and Applied Cloud
<br />Physics, Beijing. China, May 8-12, 1989. World Mete:orological Organization, Geneva,
<br />WMOtrD-No. 269, 11:655-658.
<br />
<br />No abstract.
<br />
<br />Finnegan, W. G., and R. L. Piner, 1988: A postulate of electri<c multipoles in growing ice crystals: Their role in
<br />fonnation of ice <crystal aggregates. Atrrwspheric Research, 22:235-250.
<br />
<br />This paper describes the basis of the postulate of electric multi poles in growing ice crystals. The
<br />postulate was initially developed to describe the orientation of aggregated ice crystals, for the purpose of
<br />learning about rate-detennining forces involved in the initiation of ice crystal aggregation. A series of
<br />laboratory experiments were undertaken to test the postulate. A 6.7-m3 controlled-temperature chamber
<br />was used to investigate the aggregation of growing ice crystals. The results show that small changes
<br />in dissolved salts are important in the orientation of initial ice crystal aggregates. We interpret these
<br />results to strongly support our hypothesis of electric multipoles in growing ice crystals.
<br />
<br />Finnegan, W. G., and R. L. Piner, 1988: Rapid ice nucleation: Laboratory and field studies of the phenomenon
<br />and its importance. Proceedings, 12th International Conference on Atmospheric Aerosols and
<br />Nucleation, Vienna, Austria, August 22-27, 1988. Atrrwspheric Aerosols and Nucleation, P. E. Wagner
<br />and G. Vali (eds.), Springer-Verlag, Berlin, Gennany, 693-696.
<br />
<br />The ice phase plays an important role in the fonnation of precipitation in cold continental clouds.
<br />Nucleation of the ice phase is one of the less understood processes in clouds. Knowledge of ice
<br />nucleation in clouds is limited by poor infonnation concerning where, how, and how fast ice nucleation
<br />occurs.
<br />
<br />I~
<br />I
<br />
<br />"
<br />
<br />Artificial ice nucleation, using silver iodide (AgI) and Agl-containing aerosol particles. has been studied
<br />in laboratory cloud chambers and used for atmospheric experimentation. These aerosols produce ice
<br />crystals by processes described as contact freezing, condensation freezing, immersion freezing, and
<br />deposition nucleation. AgI functions by contact freezing in cloud chambers at temperatures from -6 to
<br />-160C.
<br />
<br />33
<br />
|