@article{gledocs_11858_6950,
author = {Roessiger, Jens and Bons, Paul D. and Griera, Albert and Jessel, Mark W. and Evans, Lynn and Montagnat, Maurine and Kipfstuhl, Sepp and Faria, Sergio H. and Weikusat, Ilka},
title = {Competition between grain growth and grain-size reduction in polar ice},
year = {2011},
volume = {57},
number = {205},
pages = {942-948},

abstract = {Static (or ‘normal’) grain growth, i.e. grain boundary migration driven solely by grain boundary energy, is considered to be an important process in polar ice. Many ice-core studies report a continual increase in average grain size with depth in the upper hundreds of metres of ice sheets, while at deeper levels grain size appears to reach a steady state as a consequence of a balance between grain growth and grain-size reduction by dynamic recrystallization. The growth factor k in the normal grain growth law is important for any process where grain growth plays a role, and it is normally assumed to be a temperature-dependent material property. Here we show, using numerical simulations with the program Elle, that the factor k also incorporates the effect of the microstructure on grain growth. For example, a change in grain-size distribution from normal to log-normal in a thin section is found to correspond to an increase in k by a factor of 3.5.},
note = { \url {http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6950}},
}