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Tidal forcing on David Glacier and Drygalski Ice Tongue
Author(s)
Type
Conference paper
Language
English
Obiettivo Specifico
3.3. Geodinamica e struttura dell'interno della Terra
Editor(s)
Status
Published
Conference Name
Issued date
August 26, 2007
Conference Location
University of california, Santa Barbara, CA, USA
Abstract
During the 2005-06 Austral Summer, we carried out a joint observational campaign in the area of the David
Glacier, South Victoria Land, with the aim of collecting simultaneous time series of geodetic and seismological data.
We installed 7 temporary seismographic stations on rock outcrops surrounding the glacier and 3 temporary geodetic
stations both on flowing ice and on rock. The seismic network registered a significant low-energy seismic activity, principally originated by ice creeping and basal stress at the interface between the ice and the bedrock. The geodetic stations allowed us to survey the glacier kinematics forced by the Ross Sea tides, and to infer the grounding line location. Here we show some details about data analysis and preliminary results.
Glacier, South Victoria Land, with the aim of collecting simultaneous time series of geodetic and seismological data.
We installed 7 temporary seismographic stations on rock outcrops surrounding the glacier and 3 temporary geodetic
stations both on flowing ice and on rock. The seismic network registered a significant low-energy seismic activity, principally originated by ice creeping and basal stress at the interface between the ice and the bedrock. The geodetic stations allowed us to survey the glacier kinematics forced by the Ross Sea tides, and to infer the grounding line location. Here we show some details about data analysis and preliminary results.
References
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Shelf, Geophys. Res. Lett., 30, 7, pp 1361-1364.
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Capra A., S. Gandolfi, C. Lusetti, C. Stocchino, and L. Vittuari (1999), Kinematics GPS for the study of tidal undulations of floating ice tongue,
Bollettino di Geodesia e Scienze Affini, IGM, LVIII, n. 2, pp 151-173.
Chen G. (1998), GPS Kinematics Positioning for the Airborne Laser Altimetry at long Valley, California, Ph. D. Thesis, Massachusetts Institute of
Technology, pp. 173, Cambridge, MA.
Danesi, S., S. Bannister and A. Morelli (2007), Repeating earthquakes from rupture of an asperity under an Antarctic outlet glacier, Earth and Planet.
Sc. Lett., 253, 1-2, 151-158.
Doake C.S.M., H.F.J. Corr, K.W. Nicholls, A. Gaffikin, A. Jenkins, W.I. Bertiger, and M.A. King (2002), Tide-induced lateral movement of Brunt Ice
Shelf, Antarctica, Geophys. Res. Lett., 29 (8), pp 1226-1229, doi:10.1029/2001GL014606.
Frezzotti, M., A. Capra and L. Vittuari (1998), Comparison between glacier ice velocity inferred from GPS and sequential satellite images, Ann.
Glaciol., 27, pp 54-60.
Herring, T.A. (2002), TRACK GPS kinematic positioning program, Version 1.07, Massachusetts Institute of Technology, Cambridge
Herring T.A., R.W. King and S.C. McClusky (2006), Gamit Reference Manual, GPS Analysis at MIT, Release 10.2.
King R.W. and Y. Bock (2000), Documentation for the GAMIT GPS Analysis Software, Dep. of Earth and Planetary Sciences, Massachusetts
Institute of Technology, Cambridge, Scripps Institution of Oceanography University of California San Diego.
Klein F.W. (2002), User's guide to HYPOINVERSE-2000, a fortran program to solve for earthquake locations and magnitudes, U.S. Geol. Survey
Open File Report, pp 2–171.
Rignot E. (2002), Mass balance of East Antarctic glaciers and ice shelves from satellite data, Ann. Glaciol., 34, pp 217-227.
Smith, A.M. (2006), Microearthquakes and subglacial conditions, Geophys. Res. Lett., 33, L24501, doi:10.1029/2006GL028207.
Van Camp M., and P. Vauterin (2005), Tsoft: graphical and interactive software for the analysis of time series and Earth tides, Computer &
Geosciences, 31, pp 631-640.
Waldhauser F. (2001), hypoDD — a program to compute Double-Difference hypocentre locations, U.S. Geol. Survey Open File Report, 1–113.
102, B7, 15183-15196.
Anandakrishnan S., D.E. Voight, R.B. Alley, and M.A. King (2002), Ice stream D flow speed is strongly modulated by the tide beneath the Ross Ice
Shelf, Geophys. Res. Lett., 30, 7, pp 1361-1364.
Alley, R.B. (1992), Sticky spots under ice streams, Antarc. J. of the U.S., 28, 5, pp 50-51.
Bahr, D.B. and J.B. Rundle (1996), Stick-slip statistical mechanics at the bed of a glacier, Geophys. Res. Lett., 23, 16, pp 2073-2076.
Capra A., S. Gandolfi, C. Lusetti, C. Stocchino, and L. Vittuari (1999), Kinematics GPS for the study of tidal undulations of floating ice tongue,
Bollettino di Geodesia e Scienze Affini, IGM, LVIII, n. 2, pp 151-173.
Chen G. (1998), GPS Kinematics Positioning for the Airborne Laser Altimetry at long Valley, California, Ph. D. Thesis, Massachusetts Institute of
Technology, pp. 173, Cambridge, MA.
Danesi, S., S. Bannister and A. Morelli (2007), Repeating earthquakes from rupture of an asperity under an Antarctic outlet glacier, Earth and Planet.
Sc. Lett., 253, 1-2, 151-158.
Doake C.S.M., H.F.J. Corr, K.W. Nicholls, A. Gaffikin, A. Jenkins, W.I. Bertiger, and M.A. King (2002), Tide-induced lateral movement of Brunt Ice
Shelf, Antarctica, Geophys. Res. Lett., 29 (8), pp 1226-1229, doi:10.1029/2001GL014606.
Frezzotti, M., A. Capra and L. Vittuari (1998), Comparison between glacier ice velocity inferred from GPS and sequential satellite images, Ann.
Glaciol., 27, pp 54-60.
Herring, T.A. (2002), TRACK GPS kinematic positioning program, Version 1.07, Massachusetts Institute of Technology, Cambridge
Herring T.A., R.W. King and S.C. McClusky (2006), Gamit Reference Manual, GPS Analysis at MIT, Release 10.2.
King R.W. and Y. Bock (2000), Documentation for the GAMIT GPS Analysis Software, Dep. of Earth and Planetary Sciences, Massachusetts
Institute of Technology, Cambridge, Scripps Institution of Oceanography University of California San Diego.
Klein F.W. (2002), User's guide to HYPOINVERSE-2000, a fortran program to solve for earthquake locations and magnitudes, U.S. Geol. Survey
Open File Report, pp 2–171.
Rignot E. (2002), Mass balance of East Antarctic glaciers and ice shelves from satellite data, Ann. Glaciol., 34, pp 217-227.
Smith, A.M. (2006), Microearthquakes and subglacial conditions, Geophys. Res. Lett., 33, L24501, doi:10.1029/2006GL028207.
Van Camp M., and P. Vauterin (2005), Tsoft: graphical and interactive software for the analysis of time series and Earth tides, Computer &
Geosciences, 31, pp 631-640.
Waldhauser F. (2001), hypoDD — a program to compute Double-Difference hypocentre locations, U.S. Geol. Survey Open File Report, 1–113.