A micro-computertomograph is operated in a coldlab at temperatures down to -20°C to analyse the densification of new snow in creep experiments. We focus on isothermal conditions and the evolution on short times during 2 days. Time-lapse microtomographic images show the structural changes of the complex ice matrix. The structure undergoes visco-plastic deformation and concurrent metamorphism. We analysed the influence of different parameters like crystal shape and external stress on the evolution of density and specific surface area. In contrast to densification rate, evolution of specific surface area is independent of external stress.