Seismic data from Colle Gnifetti glacie saddle around borehole KCI, Swiss Alps
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2013
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| _version_ | 1867170044648095744 |
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| author | Diez, Anja Eisen, Olaf Hofstede, Coen Matthijs Bohleber, Pascal Polom, Ulrich |
| author_facet | Diez, Anja Eisen, Olaf Hofstede, Coen Matthijs Bohleber, Pascal Polom, Ulrich |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Two seismic surveys were carried out on the high-altitude glacier saddle, Colle Gnifetti, Monte Rosa, Italy/Switzerland. Explosive and vibroseismic sources were tested to explore the best way to generate seismic waves to deduce shallow and intermediate properties (<100 m) of firn and ice. The explosive source (SISSY) excites strong surface and diving waves, degrading data quality for processing; no englacial reflections besides the noisy bed reflector are visible. However, the strong diving waves are analyzed to derive the density distribution of the firn pack, yielding results similar to a nearby ice core. The vibrator source (ElViS), used in both P- and SH-wave modes, produces detectable laterally coherent reflections within the firn and ice column. We compare these with ice-core and radar data. The SH-wave data are particularly useful in providing detailed, high-resolution information on firn and ice stratigraphy. Our analyses demonstrate the potential of seismic methods to determine physical properties of firn and ice, particularly density and potentially also crystal-orientation fabric. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_833320 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seismic data from Colle Gnifetti glacie saddle around borehole KCI, Swiss Alps Diez, Anja Eisen, Olaf Hofstede, Coen Matthijs Bohleber, Pascal Polom, Ulrich Colle_Gnifetti_KCI; Colle Gnifetti, Monte Rosa, Swiss Alps; File content; File size; ICEDRILL; Ice drill; Method comment; Uniform resource locator/link to sgy data file Two seismic surveys were carried out on the high-altitude glacier saddle, Colle Gnifetti, Monte Rosa, Italy/Switzerland. Explosive and vibroseismic sources were tested to explore the best way to generate seismic waves to deduce shallow and intermediate properties (<100 m) of firn and ice. The explosive source (SISSY) excites strong surface and diving waves, degrading data quality for processing; no englacial reflections besides the noisy bed reflector are visible. However, the strong diving waves are analyzed to derive the density distribution of the firn pack, yielding results similar to a nearby ice core. The vibrator source (ElViS), used in both P- and SH-wave modes, produces detectable laterally coherent reflections within the firn and ice column. We compare these with ice-core and radar data. The SH-wave data are particularly useful in providing detailed, high-resolution information on firn and ice stratigraphy. Our analyses demonstrate the potential of seismic methods to determine physical properties of firn and ice, particularly density and potentially also crystal-orientation fabric. |
| title | Seismic data from Colle Gnifetti glacie saddle around borehole KCI, Swiss Alps |
| topic | Colle_Gnifetti_KCI; Colle Gnifetti, Monte Rosa, Swiss Alps; File content; File size; ICEDRILL; Ice drill; Method comment; Uniform resource locator/link to sgy data file |
| url | https://doi.org/10.1594/PANGAEA.833320 |