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  • 1
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    EPICA Dronning Maud Land EDML ice core drilling protocol (2014)
    PANGAEA
    In:  Supplement to: Wilhelms, Frank; Miller, Heinz; Gerasimoff, Michael D; Drücker, Cord; Frenzel, Andreas; Fritzsche, Diedrich; Grobe, Hannes; Hansen, Steffen Bo; Hilmarsson, Sverrir Æ; Hoffmann, Georg; Hörnby, Kerstin; Jaeschke, Andrea; Jakobsdottir, Steinunn S; Juckschat, Paul; Karsten, Achim; Karsten, Lorenz; Kaufmann, Patrik R; Karlin, Torbjörn; Kohlberg, Eberhard; Kleffel, Guido; Lambrecht, Anja; Lambrecht, Astrid; Lawer, Gunther; Schärmeli, Ivan; Schmitt, Jochen; Sheldon, Simon G; Takata, Morimasa; Trenke, Marcus; Twarloh, Birthe; Valero Delgado, Fernando; Wilhelms-Dick, Dorothee (2014): The EPICA Dronning Maud Land deep drilling operation. Annals of Glaciology, 55(68), 355-366, https://doi.org/10.3189/2014AoG68A189
    Details
    Publication Date: 2023-06-27
    Description: We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.
    Keywords: Break strength; Comment; Core length; Density, mass density; DEPTH, ice/snow; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; Kohnen Station; Level; Mass; Number; Pitch, lower limit; Pitch, upper limit; Run; Run Date/Time; Temperature, technical; Volume
    Type: Dataset
    Format: text/tab-separated-values, 14880 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Electrical conductivity measurements (ECM) from the DYE-3 4B ice core, Greenland (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: ECM data of the DYE-3 cores obtained with the technique described by Hammer (1980). People involved in the measurements include Henrik B. Clausen, Dorthe Dahl-Jensen, Niels Gundestrup and Steffen B. Hansen, Jakob Schwander, and J.P. Steffensen. Data were originally recorded on paper in high resolution but was digitized by hand in 1 cm resolution by laboratory assistant Anita Boas. The data set includes data from the DYE-3 main core and from two shallow cores, known as 4B and 18C, drilled upstream of the main drilling site. Main core: Drilled to bedrock 1979-1981 during the GISP program. Position: 65.18N, 43.83W, 2480 m a.s.l.. Core 4B: Drilled to 174 m 8 km upstream from DYE-3. Exact position not available. Core 18C: Drilled to 110 m 36 km upstream from DYE-3. Position 65.03N 44.39W. The data are given as H^+ ion concentration versus depth (measured from the undisturbed surface at the year where drilling started), but the absolute calibration must be considered tentative. For more information on the measurements and calibration, see Hammer 1980. Please cite the Hammer (1980), Neftel et al. (1985), and Rasmussen et al. (2023) when using this data file.
    Keywords: DEPTH, ice/snow; DYE; DYE-3_4B; Greenland; Hydrogen ion concentration; ICEDRILL; Ice drill; Sampling/drilling ice
    Type: Dataset
    Format: text/tab-separated-values, 17225 data points
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    DATA PANGAEA
  • 3
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    Electrical conductivity measurements (ECM) from the DYE-3 18C ice core, Greenland (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: ECM data of the DYE-3 cores obtained with the technique described by Hammer (1980). People involved in the measurements include Henrik B. Clausen, Dorthe Dahl-Jensen, Niels Gundestrup and Steffen B. Hansen, Jakob Schwander, and J.P. Steffensen. Data were originally recorded on paper in high resolution but was digitized by hand in 1 cm resolution by laboratory assistant Anita Boas. Main core: Drilled to bedrock 1979-1981 during the GISP program. Position: 65.18N, 43.83W, 2480 m a.s.l.. Core 4B: Drilled to 174 m 8 km upstream from DYE-3. Exact position not available. Core 18C: Drilled to 110 m 36 km upstream from DYE-3. Position 65.03N 44.39W. The data are given as H^+ ion concentration versus depth (measured from the undisturbed surface at the year where drilling started), but the absolute calibration must be considered tentative. For more information on the measurements and calibration, see Hammer 1980. Please cite the Hammer (1980), Neftel et al. (1985), and Rasmussen et al. (2023) when using this data file.
    Keywords: DEPTH, ice/snow; DYE; DYE-3_18C; Greenland; Hydrogen ion concentration; ICEDRILL; Ice drill; Sampling/drilling ice
    Type: Dataset
    Format: text/tab-separated-values, 10584 data points
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    DATA PANGAEA
  • 4
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    Electrical conductivity measurements (ECM) from the DYE-3 ice core, Greenland (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: ECM data of the DYE-3 cores obtained with the technique described by Hammer (1980). People involved in the measurements include Henrik B. Clausen, Dorthe Dahl-Jensen, Niels Gundestrup and Steffen B. Hansen, Jakob Schwander, and J.P. Steffensen. Data were originally recorded on paper in high resolution but was digitized by hand in 1 cm resolution by laboratory assistant Anita Boas. The data set includes data from the DYE-3 main core and from two shallow cores, known as 4B and 18C, drilled upstream of the main drilling site. Main core: Drilled to bedrock 1979-1981 during the GISP program. Position: 65.18N, 43.83W, 2480 m a.s.l.. Core 4B: Drilled to 174 m 8 km upstream from DYE-3. Exact position not available. Core 18C: Drilled to 110 m 36 km upstream from DYE-3. Position 65.03N 44.39W. The data are given as H^+ ion concentration versus depth (measured from the undisturbed surface at the year where drilling started), but the absolute calibration must be considered tentative. For more information on the measurements and calibration, see Hammer 1980. Please cite the Hammer (1980), Neftel et al. (1985), and Rasmussen et al. (2023) when using this data file.
    Keywords: DEPTH, ice/snow; DYE; DYE-3; Greenland; Hydrogen ion concentration; ISTUK; ISTUK electromechanical drill; Sampling/drilling ice
    Type: Dataset
    Format: text/tab-separated-values, 218654 data points
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    DATA PANGAEA
  • 5
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    Electrical conductivity measurements (ECM) from the GRIP ice core, central Greenland (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: ECM data from the GRIP core obtained with the technique described by Hammer (1980). People involved in the measurements include Henrik B. Clausen, Dorthe Dahl-Jensen, Christine Hvidberg, Niels Gundestrup, Steffen B. Hansen, P. M. Kristinsdottir, Jakob Schwander, and J.P. Steffensen. Data were recorded in parallel on paper in high resolution and digitally in 1 cm resolution. The main core was drilled during the GRIP project in 1989-1992 at the Summit of the Greenland ice sheet. The length is 3025 m. Present-day accumulation 0.23 m ice/yr. Data from the top 101.3 m comes from the S3 shallow core, but the two data sets have been fully integrated on a common depth scale. The data are given as H+ ion concentration versus depth (measured from the undisturbed surface in 1989), but the absolute calibration (H+ = 0.045 I^1.73) must be considered tentative. For more information on the measurements and calibration, see Hammer 1980 and Clausen et al. (1995). Please cite the Hammer (1980), Clausen et al. (1995), and Rasmussen et al. (2023) when using this data file.
    Keywords: DEPTH, ice/snow; Greenland; GRIP; Hydrogen ion concentration; ISTUK; ISTUK electromechanical drill; Sampling/drilling ice
    Type: Dataset
    Format: text/tab-separated-values, 301717 data points
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    DATA PANGAEA
  • 6
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    Electrical conductivity measurements (ECM) from the DYE-3 ice cores (main core and two shallow cores), Greenland (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: ECM data of the DYE-3 cores obtained with the technique described by Hammer (1980). People involved in the measurements include Henrik B. Clausen, Dorthe Dahl-Jensen, Niels Gundestrup and Steffen B. Hansen, Jakob Schwander, and J.P. Steffensen. Data were originally recorded on paper in high resolution but was digitized by hand in 1 cm resolution by laboratory assistant Anita Boas. The data set includes data from the DYE-3 main core and from two shallow cores, known as 4B and 18C, drilled upstream of the main drilling site. Main core: Drilled to bedrock 1979-1981 during the GISP program. Position: 65.18N, 43.83W, 2480 m a.s.l.. Core 4B: Drilled to 174 m 8 km upstream from DYE-3. Exact position not available. Core 18C: Drilled to 110 m 36 km upstream from DYE-3. Position 65.03N 44.39W. The data are given as H^+ ion concentration versus depth (measured from the undisturbed surface at the year where drilling started), but the absolute calibration must be considered tentative. For more information on the measurements and calibration, see Hammer 1980. Please cite the Hammer (1980), Neftel et al. (1985), and Rasmussen et al. (2023) when using this data file.
    Keywords: DYE; DYE-3; DYE-3_18C; DYE-3_4B; Greenland; ICEDRILL; Ice drill; ISTUK; ISTUK electromechanical drill; Sampling/drilling ice
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    The Hans Tausen drill: design, performance, further developments and some lessons learned (2007)
    Cambridge University Press
    Details
    Publication Date: 2007-01-01
    Description: In the mid-1990s, excellent results from the GRIP and GISP2 deep drilling projects in Greenland opened up funding for continued ice-coring efforts in Antarctica (EPICA) and Greenland (NorthGRIP). The Glaciology Group of the Niels Bohr Institute, University of Copenhagen, was assigned the task of providing drilling capability for these projects, as it had done for the GRIP project. The group decided to further simplify existing deep drill designs for better reliability and ease of handling. The drill design decided upon was successfully tested on Hans Tausen Ice Cap, Peary Land, Greenland, in 1995. The 5.0m long Hans Tausen (HT) drill was a prototype for the ~11m long EPICA and NorthGRIP versions of the drill which were mechanically identical to the HT drill except for a much longer core barrel and chips chamber. These drills could deliver up to 4m long ice cores after some design improvements had been introduced. The Berkner Island (Antarctica) drill is also an extended HT drill capable of drilling 2 m long cores. The success of the mechanical design of the HT drill is manifested by over 12 km of good-quality ice cores drilled by the HT drill and its derivatives since 1995.
    Print ISSN: 0260-3055
    Electronic ISSN: 1727-5644
    Topics: Geography , Geosciences
    Published by Cambridge University Press on behalf of International Glaciological Society.
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    PAPER CURRENT
  • 8
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    The EPICA Dronning Maud Land deep drilling operation (2014)
    Cambridge University Press
    Details
    Publication Date: 2014-01-01
    Description: We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.
    Print ISSN: 0260-3055
    Electronic ISSN: 1727-5644
    Topics: Geography , Geosciences
    Published by Cambridge University Press on behalf of International Glaciological Society.
    Location Call Number Expected Availability
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    PAPER CURRENT
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