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Proceedings Paper

Vertical strain determination in the Antarctic ice sheet using optical fibers
Author(s): Mark A. Zumberge
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Paper Abstract

As part of a program to measure and model vertical strain in the West Antarctic ice Sheet, we developed a new sensor to accurately and stably record displacements. The sensors consist of optical fibers, encased in thin-walled stainless steel tubes, frozen into hot-water drilled boreholes, and stretched from the surface to various depths in the ice sheet ranging to 1000 m. An EDM (electronic distance meter) connected annually to the fibers read out their absolute lengths with a precision of about 2 mm. An initial elongation of about 0.15% of the optical fibers allowed them to follow an ice thinning rate of 300 ppm per year for up to five years. Two sets of five sensors were installed in the 1997-1998 field season: one set was near the Siple Dome core hole (an ice divide) and a second set was on the flank 7 km to the north (the ice thickness at both sites is approximately 1000 m).

Paper Details

Date Published: 22 July 2003
PDF: 9 pages
Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003); doi: 10.1117/12.484259
Show Author Affiliations
Mark A. Zumberge, Univ. of California, San Diego (United States)


Published in SPIE Proceedings Vol. 5050:
Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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