Aircraft Investigations of an As–Cs Cloud System in the Arctic

A. A. Sin’kevich, R. P. Lawson, and Q. Mo

Results of aircraft investigations of the microphysical structure and properties of an As–Cs cloud system in the Arctic are presented. Data were collected over the Beaufort Sea using the US National Center for Atmospheric Research (NCAR) C-130 research aircraft. One of the modern sets of instruments was used to study the microphysical cloud structure. It was found that the clouds consisted of several layers of limited horizontal length. Spherical crystals were the prevailing habit. A decrease in their concentration with height decrease was discovered. Measurements of particle size spectra indicate their significant inhomogeneity. Spectra parametrization was carried out with the help of a gamma distribution for particles less smaller than 50 μm and exponential distribution for particles larger than 50 μm.

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