 |
| Titel |
Preliminary results from a bathymetric and seismo-stratigraphic survey in the Kongsfjorden, Svalbard Islands |
| VerfasserIn |
Fabrizio Del Bianco, Federico Giglio, Leonardo Langone, Stefano Miserocchi, Stefano Aliani, Luca Gasperini |
| Konferenz |
EGU General Assembly 2013
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083396
|
|
|
|
|
|
| Zusammenfassung |
| During September 2010, an instrumented oceanographic array was deployed by
CNR-ISMAR in the Kongsfjorden, a narrow fjord of the Svalbard archipelago. The
Kongsfjorden is 20 km long and 4-10 km wide, elongated in SE–NW direction and the
exchanges with the Arctic Ocean occur at the northwestern mouth along the western coast of
the Spitsbergen island. This fjord is particularly suitable for exploring the possible impact
of climate changes, because it is affected by Atlantic water influx (the northern
branch of Gulf stream and the Arctic-type coastal water) and melting of tidal glaciers
(Kongsvegen, Kronebreen, Blømstrandbreen), both being linked to global climate
variability.
A seismic survey was performed in the inner part of the fjord and over 130 miles of Chirp
subbottom profiles were acquired, with the purpose to describe the morpho-bathymetrical
features and surficial seismo-stratigraphy. The bottom of the fjord is dominated by a
widespread outcrop of bedrock. Several structures were detected, mainly related to relict
sub-glacial and ice-scoured topography produced during the glacial re-advances of the
Weichselian (20 ky BP) and again during the last major Holocene re-advance of the Little Ice
Age. These features are several tens meter high above the sea bottom level, and in
the southeastern part emerges as small islands separating the inner fjord into two
parts.
The area located at the inner part of the fjord, close to the calving line, is characterized
by the maximum sediment accumulation, and a thin ( |
|
|
|
|
|
|