Ice Nucleation in a Supercooled Cloud by CuI-3AgI and AgI Aerosols

Richard E. Passarelli Jr. State University of New York at Albany, Albany, N.Y. 12222

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Henry Chessin State University of New York at Albany, Albany, N.Y. 12222

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Bernard Vonnegut State University of New York at Albany, Albany, N.Y. 12222

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Abstract

The relative numbers of active ice nuclei for identically produced aerosols of AgI and CuI-3AgI are determined experimentally. For nuclei activated at temperatures above −9C, CuI-3AgI produces a greater number of active ice nuclei than pure AgI. At temperatures below −9C no measurable difference in nucleation activity can be found.

Abstract

The relative numbers of active ice nuclei for identically produced aerosols of AgI and CuI-3AgI are determined experimentally. For nuclei activated at temperatures above −9C, CuI-3AgI produces a greater number of active ice nuclei than pure AgI. At temperatures below −9C no measurable difference in nucleation activity can be found.

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