A Preliminary Study of Ice Grown by Droplet Accretion Using Water-Insoluble Particles as Tracer

F. Prodi IFA-CNR, Sezione Nubi e Precipitazioni, Bologna, Italy

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C. T. Nagamoto National Center for Atmospheric Research, Boulder, CO 80307

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J. Rosinski National Center for Atmospheric Research, Boulder, CO 80307

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Abstract

The migration of water-insoluble particles during freezing was used to study the structure of ice grown by droplet accretion. Experiments were performed in a cold tunnel under different growth conditions using nickel powder as a tracer; the resulting deposit was examined using the x-ray microradiograph technique. Analysis of the types of tracer particle aggregates provided a description of the freezing processes. It was concluded that this method could be used as an additional tool in studies of the various ice growth conditions found in nature.

Abstract

The migration of water-insoluble particles during freezing was used to study the structure of ice grown by droplet accretion. Experiments were performed in a cold tunnel under different growth conditions using nickel powder as a tracer; the resulting deposit was examined using the x-ray microradiograph technique. Analysis of the types of tracer particle aggregates provided a description of the freezing processes. It was concluded that this method could be used as an additional tool in studies of the various ice growth conditions found in nature.

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