The effects of longitudinal deviatoric stress on borehole tilting at Byrd Station in Western Antarctica

• Main Author: DeFreest, Jeffrey Wade
• Other Authors: Whillans, I. M. (Ian M.)
• Format: Thesis
• Language: English
• Published: The Ohio State University 1986
• Subjects: Byrd; Byrd Station; Tilting; West Antarctica; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/1811/59864

Borehole tilting measurements at Byrd Station in West Antarctica taken in 1975 have provided a data set against which mathematical ice modelling can be compared and adjusted for accuracy. The model described in this paper is an advance in rheological studies because it takes into consideration, the longitudinal stretching stress in addition to the shear stress acting on a horizontal plane. The data from Byrd Station and the predictions cast by the model are in very good agreement in terms of resultant ice velocity and the shear strain rate as a function of depth. Parameters in the flow law were the object of a sensitivity study, which revealed that the flow law constant A and the exponent n were the most important in adjusting the output of the model. No embargo