Abstract
Considerations of the sintering process in the atmosphere were carried out by measurement of the rate of growth of the ice neck between “sintered frozen cloud particles” observed at Syowa Station, Antarctica . As a result, if the sintering process alone contributed to the growth of the ice neck between frozen cloud particles in the atmosphere, it was considered that the sintering mechanism was not only by evaporation-condensation but also by volume diffusion and plastic or viscous flow.