radar
radiation
radiosonde
radius-dependent metamorphism
rafted ice
rafting

ram
randkluft
rawinsonde
reconstituted glacier
reconstructed glacier
recurring polynya
red algae
reformatting
regelation
regenerated glacier
relative error
relative humidity
relative permittivity
relict active layer
relict ice
relict permafrost
reprojection
residual stress
residual thaw layer
reticulate cryostructure
reticulate ice
reticulate-blocky cryostructure
retreat

retreating glacier
retrogressive thaw slump
ridge
ridge ice

ridging
