Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A.:
"Taku Glacier has advanced about 7 km since 1890. The continuing advance is the result of the tidewater-glacier cycle. In the last several decades, the glacier has bulldozed a berm of marine and fluvial sediments from the fjord bottom and produced so-called push moraines. The mobilization of th...
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Schlagworte: | |
| Zusammenfassung: | "Taku Glacier has advanced about 7 km since 1890. The continuing advance is the result of the tidewater-glacier cycle. In the last several decades, the glacier has bulldozed a berm of marine and fluvial sediments from the fjord bottom and produced so-called push moraines. The mobilization of these sediments, which were locally lifted more than 20 m above sea level by 2004, has happened episodically rather than steadily. The last major proglacial sediment deformation was observed in 2001. Since then, most deformation has been localized within some meters of the terminus. Between 2002 and 2004 surface velocities and displacements were measured across the terminus and in the proglacial area. The displacements were highest between March and June and decreased with distance from the terminus. The sediments were presumably deforming internally rather than moving along a basal décollement. A simple model and sensitivity analysis show that major movement along this layer will most likely happen if (1) the glacier steepens its surface topography, (2) the proglacial sediment wedge shortens and steepens its surface slope or (3) the water pressure increases in order to reduce the frictional resistance"--Leaf iii |
| Beschreibung: | Includes bibliographical references (leaves 20-22) General introduction -- Episodic reactivation of large scale push moraines in front of the advancing Taku Glacier, Alaska, U.S.A. -- Introduction -- Background on the Taku push moraines -- Deformation at the glacier-sediment interface -- Deformation in the proglacial area -- Movement of the proglacial bulges -- Internal structure and composition of a bulge -- Model of proglacial bulges -- Sediment strength -- Horizontal glacial force -- Results and sensitivity analysis -- Discussion -- Model interpretation -- Continuous GPS interpretation -- Conclusions -- Bibliography -- General conclusion |
| Beschreibung: | X, 75 Bl. Ill., graph. Darst., Kt. 28 cm. 1 CD-ROM |
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| 100 | 1 | |a Kuriger, Elsbeth Maria |e Verfasser |0 (DE-588)1055929908 |4 aut | |
| 245 | 1 | 0 | |a Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. |c by Elsbeth Maria Kuriger |
| 264 | 0 | |c 2005 | |
| 300 | |a X, 75 Bl. |b Ill., graph. Darst., Kt. |c 28 cm. |e 1 CD-ROM | ||
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| 338 | |b nc |2 rdacarrier | ||
| 500 | |a Includes bibliographical references (leaves 20-22) | ||
| 500 | |a General introduction -- Episodic reactivation of large scale push moraines in front of the advancing Taku Glacier, Alaska, U.S.A. -- Introduction -- Background on the Taku push moraines -- Deformation at the glacier-sediment interface -- Deformation in the proglacial area -- Movement of the proglacial bulges -- Internal structure and composition of a bulge -- Model of proglacial bulges -- Sediment strength -- Horizontal glacial force -- Results and sensitivity analysis -- Discussion -- Model interpretation -- Continuous GPS interpretation -- Conclusions -- Bibliography -- General conclusion | ||
| 502 | |a Fairbanks, Univ., Masterarbeit, 2005 | ||
| 520 | |a "Taku Glacier has advanced about 7 km since 1890. The continuing advance is the result of the tidewater-glacier cycle. In the last several decades, the glacier has bulldozed a berm of marine and fluvial sediments from the fjord bottom and produced so-called push moraines. The mobilization of these sediments, which were locally lifted more than 20 m above sea level by 2004, has happened episodically rather than steadily. The last major proglacial sediment deformation was observed in 2001. Since then, most deformation has been localized within some meters of the terminus. Between 2002 and 2004 surface velocities and displacements were measured across the terminus and in the proglacial area. The displacements were highest between March and June and decreased with distance from the terminus. The sediments were presumably deforming internally rather than moving along a basal décollement. A simple model and sensitivity analysis show that major movement along this layer will most likely happen if (1) the glacier steepens its surface topography, (2) the proglacial sediment wedge shortens and steepens its surface slope or (3) the water pressure increases in order to reduce the frictional resistance"--Leaf iii | ||
| 650 | 4 | |a Moraines / Alaska / Taku Glacier | |
| 650 | 4 | |a Glaciers / Alaska | |
| 650 | 4 | |a Drift / Alaska / Taku Glacier | |
| 650 | 7 | |a Drift |2 fast | |
| 650 | 7 | |a Glaciers |2 fast | |
| 650 | 7 | |a Moraines |2 fast | |
| 651 | 4 | |a Taku Glacier (Alaska) | |
| 651 | 7 | |a Alaska |2 fast | |
| 651 | 7 | |a Alaska / Taku Glacier |2 fast | |
| 655 | 7 | |0 (DE-588)4113937-9 |a Hochschulschrift |2 gnd-content | |
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| author | Kuriger, Elsbeth Maria |
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| author_sort | Kuriger, Elsbeth Maria |
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| geographic_facet | Taku Glacier (Alaska) Alaska Alaska / Taku Glacier |
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| indexdate | 2024-07-10T01:10:54Z |
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| physical | X, 75 Bl. Ill., graph. Darst., Kt. 28 cm. 1 CD-ROM |
| publishDateSearch | 2005 |
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| spelling | Kuriger, Elsbeth Maria Verfasser (DE-588)1055929908 aut Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. by Elsbeth Maria Kuriger 2005 X, 75 Bl. Ill., graph. Darst., Kt. 28 cm. 1 CD-ROM txt rdacontent n rdamedia nc rdacarrier Includes bibliographical references (leaves 20-22) General introduction -- Episodic reactivation of large scale push moraines in front of the advancing Taku Glacier, Alaska, U.S.A. -- Introduction -- Background on the Taku push moraines -- Deformation at the glacier-sediment interface -- Deformation in the proglacial area -- Movement of the proglacial bulges -- Internal structure and composition of a bulge -- Model of proglacial bulges -- Sediment strength -- Horizontal glacial force -- Results and sensitivity analysis -- Discussion -- Model interpretation -- Continuous GPS interpretation -- Conclusions -- Bibliography -- General conclusion Fairbanks, Univ., Masterarbeit, 2005 "Taku Glacier has advanced about 7 km since 1890. The continuing advance is the result of the tidewater-glacier cycle. In the last several decades, the glacier has bulldozed a berm of marine and fluvial sediments from the fjord bottom and produced so-called push moraines. The mobilization of these sediments, which were locally lifted more than 20 m above sea level by 2004, has happened episodically rather than steadily. The last major proglacial sediment deformation was observed in 2001. Since then, most deformation has been localized within some meters of the terminus. Between 2002 and 2004 surface velocities and displacements were measured across the terminus and in the proglacial area. The displacements were highest between March and June and decreased with distance from the terminus. The sediments were presumably deforming internally rather than moving along a basal décollement. A simple model and sensitivity analysis show that major movement along this layer will most likely happen if (1) the glacier steepens its surface topography, (2) the proglacial sediment wedge shortens and steepens its surface slope or (3) the water pressure increases in order to reduce the frictional resistance"--Leaf iii Moraines / Alaska / Taku Glacier Glaciers / Alaska Drift / Alaska / Taku Glacier Drift fast Glaciers fast Moraines fast Taku Glacier (Alaska) Alaska fast Alaska / Taku Glacier fast (DE-588)4113937-9 Hochschulschrift gnd-content |
| spellingShingle | Kuriger, Elsbeth Maria Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. Moraines / Alaska / Taku Glacier Glaciers / Alaska Drift / Alaska / Taku Glacier Drift fast Glaciers fast Moraines fast |
| subject_GND | (DE-588)4113937-9 |
| title | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. |
| title_auth | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. |
| title_exact_search | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. |
| title_full | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. by Elsbeth Maria Kuriger |
| title_fullStr | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. by Elsbeth Maria Kuriger |
| title_full_unstemmed | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. by Elsbeth Maria Kuriger |
| title_short | Terminus dynamics and deformation of proglacial sediments at the advancing Taku Glacier, Alaska, U.S.A. |
| title_sort | terminus dynamics and deformation of proglacial sediments at the advancing taku glacier alaska u s a |
| topic | Moraines / Alaska / Taku Glacier Glaciers / Alaska Drift / Alaska / Taku Glacier Drift fast Glaciers fast Moraines fast |
| topic_facet | Moraines / Alaska / Taku Glacier Glaciers / Alaska Drift / Alaska / Taku Glacier Drift Glaciers Moraines Taku Glacier (Alaska) Alaska Alaska / Taku Glacier Hochschulschrift |
| work_keys_str_mv | AT kurigerelsbethmaria terminusdynamicsanddeformationofproglacialsedimentsattheadvancingtakuglacieralaskausa |