The Subglacial Access and Fast Ice Research Experiment (SAFIRE)1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland

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The Subglacial Access and Fast Ice Research Experiment (SAFIRE) : 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland . / Hubbard, Bryn; Doyle, Samuel; Christoffersen, Poul; Young, Tun Jan; Hofstede, Coen; Hubbard, Alun; Box, Jason; Todd, Joe; Bougamont, Marion.

2016. Poster session presented at European Geosciences Union General Assembly 2016, Vienna, Austria.

Research output: Contribution to conferencePoster

Harvard

Hubbard, B, Doyle, S, Christoffersen, P, Young, TJ, Hofstede, C, Hubbard, A, Box, J, Todd, J & Bougamont, M 2016, 'The Subglacial Access and Fast Ice Research Experiment (SAFIRE): 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland ' European Geosciences Union General Assembly 2016, Vienna, Austria, 17 Apr 2016 - 22 Apr 2016, .

APA

Hubbard, B., Doyle, S., Christoffersen, P., Young, T. J., Hofstede, C., Hubbard, A., ... Bougamont, M. (2016). The Subglacial Access and Fast Ice Research Experiment (SAFIRE): 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland . Poster session presented at European Geosciences Union General Assembly 2016, Vienna, Austria.

Vancouver

Hubbard B, Doyle S, Christoffersen P, Young TJ, Hofstede C, Hubbard A et al. The Subglacial Access and Fast Ice Research Experiment (SAFIRE): 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland . 2016. Poster session presented at European Geosciences Union General Assembly 2016, Vienna, Austria.

Author

Hubbard, Bryn ; Doyle, Samuel ; Christoffersen, Poul ; Young, Tun Jan ; Hofstede, Coen ; Hubbard, Alun ; Box, Jason ; Todd, Joe ; Bougamont, Marion. / The Subglacial Access and Fast Ice Research Experiment (SAFIRE) : 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland . Poster session presented at European Geosciences Union General Assembly 2016, Vienna, Austria.

Bibtex - Download

@conference{f457be7d98844f3e9abcc4651a2088c3,
title = "The Subglacial Access and Fast Ice Research Experiment (SAFIRE): 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland",
abstract = "As part of the Subglacial Access and Fast Ice Research Experiment (SAFIRE) pressurised hot water was used to drill four 603-616 m-long boreholes to the bed of the Greenland Ice Sheet at a site located 30 km from the calving front of fast-flowing, marine-terminating Store Glacier (70 degrees N, ∼1000 m elevation). Four wired sensor strings were successfully installed in three of the boreholes. These included a thermistor string to obtain the englacial temperature profile installed in the same borehole as a string of tilt sensors to measure borehole deformation, and two sets of combined water pressure, electrical conductivity and turbidity sensors installed just above the bed in separate, adjacent boreholes. The boreholes made a strong hydrological connection to the bed during drilling, draining rapidly to ∼80 m below the ice surface. The connection of subsequent boreholes was observed as a perturbation in water pressure and temperature recorded in neighbouring boreholes, indicating an effective hydrological connection between them. The sensors, which were wired to data-loggers at the surface, operated for between ∼30 and >80 days from late summer into autumn before the cables stretched and snapped, with the lowermost sensors failing first. The records obtained from these sensors reveal (i) subglacial water pressures that were close to overburden but which generally increased through the period of measurement and varied diurnally by ∼0.3 m, (ii) a minimum englacial temperature of -21 degrees C underlain by a zone of temperate ice, some tens of m thick, located immediately above the bed, and (iii) high rates of internal deformation and strain that increased towards the bed. These borehole observations are complemented by GPS measurements of ice motion, meteorological data, and seismic and radar surveys.",
author = "Bryn Hubbard and Samuel Doyle and Poul Christoffersen and Young, {Tun Jan} and Coen Hofstede and Alun Hubbard and Jason Box and Joe Todd and Marion Bougamont",
year = "2016",
language = "English",
note = "European Geosciences Union General Assembly 2016 ; Conference date: 17-04-2016 Through 22-04-2016",

}

RIS (suitable for import to EndNote) - Download

TY - CONF

T1 - The Subglacial Access and Fast Ice Research Experiment (SAFIRE)

T2 - 1. Borehole-based englacial and subglacial measurements from a rapidly-moving tidewater glacier: Store Glacier, Greenland

AU - Hubbard, Bryn

AU - Doyle, Samuel

AU - Christoffersen, Poul

AU - Young, Tun Jan

AU - Hofstede, Coen

AU - Hubbard, Alun

AU - Box, Jason

AU - Todd, Joe

AU - Bougamont, Marion

PY - 2016

Y1 - 2016

N2 - As part of the Subglacial Access and Fast Ice Research Experiment (SAFIRE) pressurised hot water was used to drill four 603-616 m-long boreholes to the bed of the Greenland Ice Sheet at a site located 30 km from the calving front of fast-flowing, marine-terminating Store Glacier (70 degrees N, ∼1000 m elevation). Four wired sensor strings were successfully installed in three of the boreholes. These included a thermistor string to obtain the englacial temperature profile installed in the same borehole as a string of tilt sensors to measure borehole deformation, and two sets of combined water pressure, electrical conductivity and turbidity sensors installed just above the bed in separate, adjacent boreholes. The boreholes made a strong hydrological connection to the bed during drilling, draining rapidly to ∼80 m below the ice surface. The connection of subsequent boreholes was observed as a perturbation in water pressure and temperature recorded in neighbouring boreholes, indicating an effective hydrological connection between them. The sensors, which were wired to data-loggers at the surface, operated for between ∼30 and >80 days from late summer into autumn before the cables stretched and snapped, with the lowermost sensors failing first. The records obtained from these sensors reveal (i) subglacial water pressures that were close to overburden but which generally increased through the period of measurement and varied diurnally by ∼0.3 m, (ii) a minimum englacial temperature of -21 degrees C underlain by a zone of temperate ice, some tens of m thick, located immediately above the bed, and (iii) high rates of internal deformation and strain that increased towards the bed. These borehole observations are complemented by GPS measurements of ice motion, meteorological data, and seismic and radar surveys.

AB - As part of the Subglacial Access and Fast Ice Research Experiment (SAFIRE) pressurised hot water was used to drill four 603-616 m-long boreholes to the bed of the Greenland Ice Sheet at a site located 30 km from the calving front of fast-flowing, marine-terminating Store Glacier (70 degrees N, ∼1000 m elevation). Four wired sensor strings were successfully installed in three of the boreholes. These included a thermistor string to obtain the englacial temperature profile installed in the same borehole as a string of tilt sensors to measure borehole deformation, and two sets of combined water pressure, electrical conductivity and turbidity sensors installed just above the bed in separate, adjacent boreholes. The boreholes made a strong hydrological connection to the bed during drilling, draining rapidly to ∼80 m below the ice surface. The connection of subsequent boreholes was observed as a perturbation in water pressure and temperature recorded in neighbouring boreholes, indicating an effective hydrological connection between them. The sensors, which were wired to data-loggers at the surface, operated for between ∼30 and >80 days from late summer into autumn before the cables stretched and snapped, with the lowermost sensors failing first. The records obtained from these sensors reveal (i) subglacial water pressures that were close to overburden but which generally increased through the period of measurement and varied diurnally by ∼0.3 m, (ii) a minimum englacial temperature of -21 degrees C underlain by a zone of temperate ice, some tens of m thick, located immediately above the bed, and (iii) high rates of internal deformation and strain that increased towards the bed. These borehole observations are complemented by GPS measurements of ice motion, meteorological data, and seismic and radar surveys.

UR - http://hdl.handle.net/2160/43420

M3 - Poster

ER -

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