Abstract: The technique based on the concept of successive modification of simple shapes using elementary mathematical functions to represent the shape and size of ice crystals in clouds is discussed. Two hypothetical samples of ice ...

Abstract: No Abstract Available.

Abstract: Mathematical expressions based on earlier ideas of the author are given to describe the three-dimensional surfaces of hexagonal ice crystals and conical graupel and hail particles. In the former class, the expressions ...

Abstract: The efficiencies with which ice crystals at low?intermediate Reynolds numbers collide with supercooled cloud droplets are determined numerically. Three ice crystal habits are considered here: hexagonal ice plates, broad-branch ...

Abstract: The unsteady flow fields around falling columnar ice crystals, hexagonal ice plates, and broad-branch crystals are simulated by numerically solving the time-dependent Navier?Stokes equations appropriate for these geometries ...

Abstract: The ventilation coefficients for columnar, hexagonal plate, and broad branch ice crystals falling in air are computed by first solving numerically the convective diffusion equation for water vapor density to obtain its ...

Abstract: Some historical weather records of China in the governmental archives are discussed. The records in the pre-Qing period (before 1636) am briefly summarized and their use for the reconstruction of past climate is assessed. ...

Abstract: An experimental study of the scavenging of aerosol particles of mean radius 0.75 ?m by natural snow crystals of a few milimeters is carried out. Aerosol particles are spherical indium acetylacetonate particles generated ...

Abstract: AbstractFluid flow fields and fall patterns of falling planar ice crystals are studied by numerically solving the unsteady, incompressible Navier?Stokes equations using a commercially available computational fluid dynamics ...

Abstract: The characteristics of shapes and sizes of a sample of 679 hailstones, collected on 22 June 1976 during a hailstorm at Grover, Colorado, were analyzed using a three-parameter formula developed by us previously. These ...