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  • 2020-2024  (86)
  • 2000-2004  (4)
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  • 1
  • 2
    Publication Date: 2001-01-01
    Description: Glacier-surface displacements produced by geothermal and volcanic activity beneath Vatnajökull ice cap in Iceland are described by field surveys of the surface topography combined with interferograms acquired from repeat-pass synthetic aperture radar images. A simple ice-flow model serves well to confirm the basic interpretation of the observations. The observations cover the period October 1996–January 1999 and comprise: (a) the ice-flow field during the infilling of the depressions created by the subglacial Gjálp eruption of October 1996, (b) the extent and displacement of the floating ice cover of the subglacier lakes of Grímsvötn and the Skaftá cauldrons, (c) surface displacements above the subglacier pathways of the jökulhlaups from the Gjálp eruption site and the Grímsvötn lake, (d) detection of areas of increased basal sliding due to lubrication by water, and (e) detection of spots of temporal displacement that may be related to altering subglacial volcanic activity. At the depression created by the Gjálp eruption, the maximum surface displacement rate away from the radar decreased from 27 cm d−1 to 2 cm d−1 over the period January 1997–January 1999. The observed vertical displacement of the ice cover of Grímsvötn changed from an uplift rate of 50 cm d−1 to sinking of 48 cm d−1, and for Skaftá cauldrons from 2 cm d to 25 cm d−1.
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
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  • 3
    Publication Date: 2003-01-01
    Description: Recent surges of two outlet glaciers of the Vatnajökull ice cap, Iceland, were observed using European Remote-sensing Satellite (ERS) synthetic aperture radar (SAR) tandem interferograms from12 different dates between December 1995 and January 2000. ERS SAR interferometry provided new information on the temporal and spatial variations in surface velocity during surges, after fieldwork became impossible. The area affected by the surge and therefore by increased basal sliding was delineated. Themigration of flow divides on the ice cap during a surge was described. At Sylgjujökull, a western outlet glacier covering an area of 175 km2, the fully developed surge and its abating phase were studied. Over a period of 4 2 years after December 1995, the ice motion decreased steadily, with initially the highest velocities and subsequently the most pronounced decrease in velocity at the glacier terminus. The surge of Dyngjujökull, a northern outlet glacier covering an area of 1040 km2, reached its maximum in 1999/2000. Slow acceleration over an area of about 200 km2 was first observed between March 1996 and January 1997. The interferogram from January 1999 shows a well-developed surge area, covering 210 km2. This area more than doubled by January 2000, with maximum velocities reaching 〉7 md–1. Between January 1997 and January 2000, the flow divide between Dyngju- and Skeiðararjökull shifted 16 km to the south. The investigations indicate that a surge cycle on these glaciers spans several years, with slowly increasing motion over an extended area in the beginning, and more pronounced velocity changes during the active surge phase lasting 1–2 years.
    Print ISSN: 0260-3055
    Electronic ISSN: 1727-5644
    Topics: Geography , Geosciences
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  • 4
  • 5
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: Austria; DATE/TIME; Event label; Gepatschferner; GLAC; Glacial flow velocity, horizontal, annual; LATITUDE; LONGITUDE; Number; Sampling/measurements on glacier; Taschachferner_E; Tirol, Austria; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
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  • 6
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: DATE/TIME; Glacial flow velocity, horizontal, annual; HEF; Hintereisferner; Hintereisferner, Ötztaler Alpen, Austria; LATITUDE; Line; LONGITUDE; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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  • 7
    Publication Date: 2023-04-27
    Description: Glacier surface velocities are measured on four neighbouring glaciers in the Ötztal Alps (Austria). Measurements of the annual horizontal flow velocity (Δs/a [m/a]) on Hintereisferner (HEF) were started in 1885 at stone lines (cross-profiles). Annual values for the stone lines are given as mean values from the stones at the cross-profiles. On Kesselwandferner, the annual horizontal (Δs/a [m/a]) and vertical velocities (Δv/a [m/a], positive upwards and negative downwards) are measured at ablation and accumulation stakes since 1965. On Taschachferner (TSF) and Gepatschferner (GPF), the records of annual and subseasonal horizontal flow velocities at ablation stakes were started in 2009. This data series is a continuation of: doi:10.1594/PANGAEA.896741
    Keywords: DATE/TIME; GLAC; Glacial flow, horizontal; Glacial flow, vertical; Glacial flow velocity, horizontal, annual; Glacial flow velocity, vertical, annual; Kesselwandferner; Kesselwandferner, Ötztaler Alpen, Austria; KWF; LATITUDE; Line; LONGITUDE; Sampling/measurements on glacier; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator; Years
    Type: Dataset
    Format: text/tab-separated-values, 64 data points
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  • 8
    Publication Date: 2023-04-27
    Description: Surface velocities have been regularly monitored at the rock glacier in Outer Hochebenkar, Ötztal Alps, Austria since the early 1950s. This data collection provides surface velocity time series, showing mean profile velocities of four cross profiles since the beginning of the measurements. These data-series start in 2016 and is a continuation of Hartl et al. (2016), doi:10.1594/PANGAEA.861405.
    Keywords: DATE/TIME; Easting, local; ELEVATION; Event label; HEK_P0_S1; HEK_P0_S2; HEK_P0_S3; HEK_P0_S4; HEK_P0_S5; HEK_P0_S6; HEK_P1_S1; HEK_P1_S10; HEK_P1_S2; HEK_P1_S3; HEK_P1_S4; HEK_P1_S5; HEK_P1_S6; HEK_P1_S7; HEK_P1_S8; HEK_P1_S9; HEK_P2_S1; HEK_P2_S10; HEK_P2_S11; HEK_P2_S12; HEK_P2_S2; HEK_P2_S3; HEK_P2_S4; HEK_P2_S5; HEK_P2_S6; HEK_P2_S7; HEK_P2_S8; HEK_P2_S9; HEK_P3_S1; HEK_P3_S10; HEK_P3_S11; HEK_P3_S12; HEK_P3_S2; HEK_P3_S3; HEK_P3_S4; HEK_P3_S5; HEK_P3_S6; HEK_P3_S7; HEK_P3_S8; HEK_P3_S9; Identification; MULT; Multiple investigations; Northing, local; Ötztal, Tyrolian Alps, Austria; Outer Hochebenkar Profile 0 Stone 1; Outer Hochebenkar Profile 0 Stone 2; Outer Hochebenkar Profile 0 Stone 3; Outer Hochebenkar Profile 0 Stone 4; Outer Hochebenkar Profile 0 Stone 5; Outer Hochebenkar Profile 0 Stone 6; Outer Hochebenkar Profile 1 Stone 1; Outer Hochebenkar Profile 1 Stone 10; Outer Hochebenkar Profile 1 Stone 2; Outer Hochebenkar Profile 1 Stone 3; Outer Hochebenkar Profile 1 Stone 4; Outer Hochebenkar Profile 1 Stone 5; Outer Hochebenkar Profile 1 Stone 6; Outer Hochebenkar Profile 1 Stone 7; Outer Hochebenkar Profile 1 Stone 8; Outer Hochebenkar Profile 1 Stone 9; Outer Hochebenkar Profile 2 Stone 1; Outer Hochebenkar Profile 2 Stone 10; Outer Hochebenkar Profile 2 Stone 11; Outer Hochebenkar Profile 2 Stone 12; Outer Hochebenkar Profile 2 Stone 2; Outer Hochebenkar Profile 2 Stone 3; Outer Hochebenkar Profile 2 Stone 4; Outer Hochebenkar Profile 2 Stone 5; Outer Hochebenkar Profile 2 Stone 6; Outer Hochebenkar Profile 2 Stone 7; Outer Hochebenkar Profile 2 Stone 8; Outer Hochebenkar Profile 2 Stone 9; Outer Hochebenkar Profile 3 Stone 1; Outer Hochebenkar Profile 3 Stone 10; Outer Hochebenkar Profile 3 Stone 11; Outer Hochebenkar Profile 3 Stone 12; Outer Hochebenkar Profile 3 Stone 2; Outer Hochebenkar Profile 3 Stone 3; Outer Hochebenkar Profile 3 Stone 4; Outer Hochebenkar Profile 3 Stone 5; Outer Hochebenkar Profile 3 Stone 6; Outer Hochebenkar Profile 3 Stone 7; Outer Hochebenkar Profile 3 Stone 8; Outer Hochebenkar Profile 3 Stone 9; Profile
    Type: Dataset
    Format: text/tab-separated-values, 160 data points
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  • 9
    Publication Date: 2023-04-27
    Description: Surface velocities have been regularly monitored at the rock glacier in Outer Hochebenkar, Ötztal Alps, Austria since the early 1950s. This data collection provides surface velocity time series, showing mean profile velocities of four cross profiles since the beginning of the measurements. These data-series start in 2016 and is a continuation of Hartl et al. (2016), doi:10.1594/PANGAEA.861405.
    Keywords: DATE/TIME; Easting, local; ELEVATION; Event label; HEK_P0_S1; HEK_P0_S2; HEK_P0_S3; HEK_P0_S4; HEK_P0_S5; HEK_P0_S6; HEK_P1_S1; HEK_P1_S2; HEK_P1_S3; HEK_P1_S4; HEK_P1_S5; HEK_P1_S6; HEK_P1_S7; HEK_P1_S8; HEK_P1_S9; HEK_P2_S1; HEK_P2_S10; HEK_P2_S11; HEK_P2_S12; HEK_P2_S2; HEK_P2_S3; HEK_P2_S4; HEK_P2_S5; HEK_P2_S6; HEK_P2_S7; HEK_P2_S8; HEK_P2_S9; HEK_P3_S1; HEK_P3_S10; HEK_P3_S11; HEK_P3_S12; HEK_P3_S2; HEK_P3_S3; HEK_P3_S4; HEK_P3_S5; HEK_P3_S6; HEK_P3_S7; HEK_P3_S8; HEK_P3_S9; Identification; MULT; Multiple investigations; Northing, local; Ötztal, Tyrolian Alps, Austria; Outer Hochebenkar Profile 0 Stone 1; Outer Hochebenkar Profile 0 Stone 2; Outer Hochebenkar Profile 0 Stone 3; Outer Hochebenkar Profile 0 Stone 4; Outer Hochebenkar Profile 0 Stone 5; Outer Hochebenkar Profile 0 Stone 6; Outer Hochebenkar Profile 1 Stone 1; Outer Hochebenkar Profile 1 Stone 2; Outer Hochebenkar Profile 1 Stone 3; Outer Hochebenkar Profile 1 Stone 4; Outer Hochebenkar Profile 1 Stone 5; Outer Hochebenkar Profile 1 Stone 6; Outer Hochebenkar Profile 1 Stone 7; Outer Hochebenkar Profile 1 Stone 8; Outer Hochebenkar Profile 1 Stone 9; Outer Hochebenkar Profile 2 Stone 1; Outer Hochebenkar Profile 2 Stone 10; Outer Hochebenkar Profile 2 Stone 11; Outer Hochebenkar Profile 2 Stone 12; Outer Hochebenkar Profile 2 Stone 2; Outer Hochebenkar Profile 2 Stone 3; Outer Hochebenkar Profile 2 Stone 4; Outer Hochebenkar Profile 2 Stone 5; Outer Hochebenkar Profile 2 Stone 6; Outer Hochebenkar Profile 2 Stone 7; Outer Hochebenkar Profile 2 Stone 8; Outer Hochebenkar Profile 2 Stone 9; Outer Hochebenkar Profile 3 Stone 1; Outer Hochebenkar Profile 3 Stone 10; Outer Hochebenkar Profile 3 Stone 11; Outer Hochebenkar Profile 3 Stone 12; Outer Hochebenkar Profile 3 Stone 2; Outer Hochebenkar Profile 3 Stone 3; Outer Hochebenkar Profile 3 Stone 4; Outer Hochebenkar Profile 3 Stone 5; Outer Hochebenkar Profile 3 Stone 6; Outer Hochebenkar Profile 3 Stone 7; Outer Hochebenkar Profile 3 Stone 8; Outer Hochebenkar Profile 3 Stone 9; Profile
    Type: Dataset
    Format: text/tab-separated-values, 156 data points
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  • 10
    Publication Date: 2023-04-27
    Description: Surface velocities have been regularly monitored at the rock glacier in Outer Hochebenkar, Ötztal Alps, Austria since the early 1950s. This data collection provides surface velocity time series, showing mean profile velocities of four cross profiles since the beginning of the measurements. These data-series start in 2016 and is a continuation of Hartl et al. (2016), doi:10.1594/PANGAEA.861405.
    Keywords: Comment; DATE/TIME; Easting, local; ELEVATION; Event label; HEK_P0_S1; HEK_P0_S2; HEK_P0_S3; HEK_P0_S4; HEK_P0_S5; HEK_P0_S6; HEK_P1_S1; HEK_P1_S10; HEK_P1_S2; HEK_P1_S3; HEK_P1_S4; HEK_P1_S5; HEK_P1_S6; HEK_P1_S7; HEK_P1_S8; HEK_P1_S9; HEK_P2_S1; HEK_P2_S10; HEK_P2_S11; HEK_P2_S12; HEK_P2_S2; HEK_P2_S3; HEK_P2_S4; HEK_P2_S5; HEK_P2_S6; HEK_P2_S7; HEK_P2_S8; HEK_P2_S9; HEK_P3_S1; HEK_P3_S10; HEK_P3_S11; HEK_P3_S12; HEK_P3_S2; HEK_P3_S3; HEK_P3_S4; HEK_P3_S5; HEK_P3_S6; HEK_P3_S7; HEK_P3_S8; HEK_P3_S9; Identification; MULT; Multiple investigations; Northing, local; Ötztal, Tyrolian Alps, Austria; Outer Hochebenkar Profile 0 Stone 1; Outer Hochebenkar Profile 0 Stone 2; Outer Hochebenkar Profile 0 Stone 3; Outer Hochebenkar Profile 0 Stone 4; Outer Hochebenkar Profile 0 Stone 5; Outer Hochebenkar Profile 0 Stone 6; Outer Hochebenkar Profile 1 Stone 1; Outer Hochebenkar Profile 1 Stone 10; Outer Hochebenkar Profile 1 Stone 2; Outer Hochebenkar Profile 1 Stone 3; Outer Hochebenkar Profile 1 Stone 4; Outer Hochebenkar Profile 1 Stone 5; Outer Hochebenkar Profile 1 Stone 6; Outer Hochebenkar Profile 1 Stone 7; Outer Hochebenkar Profile 1 Stone 8; Outer Hochebenkar Profile 1 Stone 9; Outer Hochebenkar Profile 2 Stone 1; Outer Hochebenkar Profile 2 Stone 10; Outer Hochebenkar Profile 2 Stone 11; Outer Hochebenkar Profile 2 Stone 12; Outer Hochebenkar Profile 2 Stone 2; Outer Hochebenkar Profile 2 Stone 3; Outer Hochebenkar Profile 2 Stone 4; Outer Hochebenkar Profile 2 Stone 5; Outer Hochebenkar Profile 2 Stone 6; Outer Hochebenkar Profile 2 Stone 7; Outer Hochebenkar Profile 2 Stone 8; Outer Hochebenkar Profile 2 Stone 9; Outer Hochebenkar Profile 3 Stone 1; Outer Hochebenkar Profile 3 Stone 10; Outer Hochebenkar Profile 3 Stone 11; Outer Hochebenkar Profile 3 Stone 12; Outer Hochebenkar Profile 3 Stone 2; Outer Hochebenkar Profile 3 Stone 3; Outer Hochebenkar Profile 3 Stone 4; Outer Hochebenkar Profile 3 Stone 5; Outer Hochebenkar Profile 3 Stone 6; Outer Hochebenkar Profile 3 Stone 7; Outer Hochebenkar Profile 3 Stone 8; Outer Hochebenkar Profile 3 Stone 9; Profile
    Type: Dataset
    Format: text/tab-separated-values, 159 data points
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