Abstract: Measurements of ice nucleus concentrations using Millipore filters at altitudes of about 4 and 11 km over lengthy paths are described. Bands of ice nuclei between latitudes 23S and 30S were frequently found at both altitudes, ...

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Abstract: Ice nuclei were monitored, using the membrane filter technique at eight sites around the 17-km perimeter of a rough circle and at one site in a 40 ha wheat field within the circle. The wheat field was then sprayed in fine ...

Abstract: Concentrations of ice nuclei have been measured in aerosols sampled by pairs of membrane filters mounted high on the forward mast of a ship making almost continuous voyages during the years 1969?72 over the half of the ...

Abstract: Particles were collected from the stratosphere by impaction onto specially treated electron microscope screens during six balloon flights in Wyoming in 1972. The submicron diameter particles were predominantly ammonium ...

Abstract: A description is given of the variation with altitude and time of the size distributions and concentrations of stratospheric particles collected with impactors carried on 35 Australian balloon flights from latitude 34°S ...

Abstract: Particles were captured by electrostatic precipitators or impactors at atmospheric monitoring bases in Alaska, Hawaii, Tasmania and Antarctica, and examined by electron microscopy. Particle number and mass distributions ...

Abstract: No abstract available

Abstract: No Abstract Available.

Abstract: An analysis of cloud seeding experiments in Australia prior to 1984 that used silver iodide dispensed from aircraft as the seeding agent suggested that there were systematic aftereffects of seeding at least one month after ...