Boudinage in Glacier Ice — Some Examples

Rheology of glacier ice.

A new method for calculating the stress field in bounded ice shelves is used to compare strain rate and deviatoric stress on the Ross Ice Shelf, Antarctica. The analysis shows that strain rate (per second) increases as the third power of deviatoric stress (in newtons per square meter), with a constant of proportionality equal to 2.3 x 10(-25).

Greenland outlet glacier ice - flow variability

1 I ce mass loss from the Greenland Ice Sheet is a primary contributor to global sea level rise. The rate of ice loss has accelerated over the last couple of decades and Greenland currently contributes about 0.7-1.1 mm/yr to sea-level rise (260-380 Gt/ice per year; Enderlin et al. 2014; Shepherd et al. 2012). Predicting the potential rate and limits of future mass loss requires a clear understa...

Snow Avalanches, Ice Avalanches and Glacier Surges

Some Comments on Glacier Flow

Drs . O rowan and Perutz have shown that glacier ice does not behave as a viscous fluid but is plastic like all crystalline materials. The present authnr discusses two observed types of ice flow :-( 1) the normal, regular streaming flow in s low-moving glaciers; (2) Block-Sclzol/en" movement in swi ftl y flowing ice. Mention is made of the shear plane or laminar flow theory of Philipp. It appea...

Ripples in the Ice: Employing ogives to deduce glacier behavior

Arcuate glacier structures known as ogives are common to valley glaciers flowing below large icefalls and form annually. Long sequences comprising tens of ogives are often preserved on glacier surfaces. We explore their utility as unique sources of information about glacier behavior. Our investigation concentrates on two main objectives: (1) to assess any correlation between an ogive train and ...