Net Budget and Flow of South Cascade Glacier, Washington

South Cascade Glacier mass balance , 1935 – 2006

A simple model uses daily observations of precipitation and temperature at a nearby weather station to estimate glacier-average seasonal mass-balance components at South Cascade Glacier, Washington, USA, from 1935, 24 years before measurements began at the glacier. This is 13 years earlier than measurements that can be derived using the NCEP–NCAR reanalysis database (begins 1 January 1948). Alt...

Annual Net Balance of North Cascade Glaciers, 1984-94 North Cascade Glacier Climate Project

Force Budget: Iii. Application to Three- Dimensional Flow of Byrd Glacier, Antarctica

Stresses at the surface and at depth are calculated for a stretch of Byrd Glacier, Antarctica. The calculations are based on photogrammetrically determined velocities and elevations, and on radio-echo-determined ice thicknesses. The results are maps of drags from each valley wall, of normal forces laterally and longitudinally. and of basal drag. Special challenges in the calculation are the num...

The Mechanics of Glacier Flow

The flow of valley glaciers is examined in the light of recent laboratory experiments on the behaviour of ice under load. Simple expressions are given for the velocity distributions in some cases of laminar flow, and the modification of a pure laminar flow theory necessary to explain the formation of transverse crevasses and thrust planes is considered. The paper ends with some remarks about th...

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...