Evidence for floatation or near floatation in the mouth of Kamb Ice Stream, West Antarctica, prior to stagnation

The marginal shear stress of Ice Stream B , West Antarctica

To ascertain whether the , ·elocity of Ice Stream B, \\'est Antarctica, may be controlled by the stres e in its marginal shear zones \ the .. Snake" and the .. Dragon'· ), we undertook a determination of the marginal hear stress in the Dragon near Camp up B by using ice itself as a stress meter. The ob erved marginal shear strain rate of0.14 a I is used to calculate the marginal shear stress fr...

Capillarity and Archimedes’ Principle of Floatation

We consider some of the complications that arise in attempting to generalize a version of Archimedes’ principle of floatation to account for capillary effects. The main result provides a means to relate the floating position (depth in the liquid) of a symmetrically floating sphere in terms of readily observable geometric quantities. A similar result is obtained for an idealized case correspondi...

Low-stress transfer bonding using floatation

A novel method for transferring thin, large-area polymer layers from a mould and its subsequent bonding to a destination substrate is presented here. Buoyancy is used for transfer via floatation to allow the release of internal stress in the polymer and to avoid induced strain. Additionally, floatation leads to wrinkle-free contact between the polymer layer and its destination substrate, an imp...

How to insert a pulmonary artery floatation catheter.

Kamb Ice Stream flow history and surge potential

A basal zone, tens of meters thick, of debris-laden ice was observed in Kamb Ice Stream, West Antarctica, using a video camera lowered into boreholes made by hot-water drilling. The debris content varies, sometimes abruptly, forming a sequence of layers that reflect the complex history of fast ice flow and bed interaction. In most parts, the concentration of debris is low, a few percent by weig...