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Ice Properties Derived from Reflection Seismics at a Cold Alpine Saddle and a Local Antarctic Dome

Diez, Anja


For paleoclimate reconstructions or to predict future changes in sea level rise the dynamics of ice need to be known. This knowledge can be gained by a better understanding about the physical properties of ice. To derive these ice properties reflection seismics can be carried out. Up to now it is not very common to investigate internal structures of glaciers with the help of seismic measurements.
For this purpose data from Colle Gnifetti, Monte Rosa, Switzerland and Halvfarryggen, Dronning Maud land, Antarctica were analyzed. Colle Gnifetti, an alpine saddle, resembles very well polar ice conditions and is thus an excellent test area close by. The shallow glacier (60 m) and the thick firn pack (30 m) made it impossible to filter out internal reflections. Further Problems during filtering occurred due to parasitic resonances of the geophone. Nevertheless the diving wave could be used to derive a density profile of the firn and ice. At Halvfarryggen, a local dome of 900 m thickness, internal reflections could clearly be observed below the firn transition zone down to the bed. It was the first time that internal reflections could be observed at an ice dome. ... mehr

Volltext §
DOI: 10.5445/IR/1000046658
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Hochschulschrift
Publikationsjahr 2010
Sprache Englisch
Identifikator urn:nbn:de:swb:90-466588
KITopen-ID: 1000046658
Verlag Karlsruher Institut für Technologie (KIT)
Umfang 103 S.
Art der Arbeit Abschlussarbeit - Diplom
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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