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49-001-015
SEdiment Drifts of the ANtarctic Offshore
SEDANO
SEDANO I, SEDANO II
Italian Research Programme in Antartica, Programma Nazionale Ricerche in
Antartide
OGS, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste
01/06/1994
31/05/1998
No
Antartic Peninsula Pacific Margin (67-65S, 82-70W)
Coastal and Offshore
SOUTHERN OCEAN REGION, Southern Ocean (localised)
SEDANO Project aim to understand the origin of the glacial depositional
systems found offshore the Pacific margin of the Antarctic Peninsula. Four
main glacial depositional systems have been identified. Geophysical surveys
were carried out during these two projects The cores collected in this area
characterise the sediment drifts as composed by fine-grained, poorly-sorted
sediments, sourced from turbidity currents generated on the continental
slope. To elucidate the role of dispersal and redistribution of sediments by
bottom currents, three one-year long bottom current records in the area of the
mound 7 were collected as well as nine CTD measurements collected in the
same area . It is worthwhile noting the importance of this data set,
constituting the first current measurements available in the Pacific margin of
the Antarctic Peninsula. The aim of this work threefold: to infer which are the
major large scale processes that govern bottom current regime, to
understand the Bottom Boundary Layer (BBL) dynamics, and to assess the
potential for resuspension induced by the measured currents.
Camerlenghi, A., Crise, A., Pudsey, C.J., Accerboni, E., Laterza, R. and
Rebesco, M. 1997. Ten-month observation of the bottom current regime
across a sediment drift of the Pacific margin of the Antarctic Peninsula.
Antarctic Science, 9, 426–433.
Pudsey, C.J. and Camerlenghi, A. 1998. Glacial–interglacial deposition on a
sediment drift on the Pacific margin of the Antarctic Peninsula. Antarctic
Science, 10, 1–23.
Giorgetti A., A. Crise, R. Laterza, L. Perini, M. Rabesco and A. Camerlenghi,
2003, Water masses and bottom boundary layer dynamics above a sediment
drifts of the Antarctic Peninsula Pacific Margin, Antarctic Science, 15 (4),
537-546.
Monitoring, bottom-current, sedimentation, multichannel seismic reflection
profiles, sediment cores
PHYSICAL OCEANOGRAPHY, GEOLOGY - GEOPHYSICS –
SEDIMENTATION, SEAFLOOR SAMPLES (eg core,dredge,grab)
http://doga.ogs.trieste.it/
OGS, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste
Workpackage coordinator
British Antarctic Survey (GB), Istituto di Geologia Marina di Bologna (Italy),
University of Trieste (Italy), ETH Zurich (CH), Geomare Sud (Italy)
Dr. Alessandro Crise (OGS, Italy)
OGS, Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste,
Borgo Grotta Gigante 42/c, 34010 Sgonico (Trieste), Italy
+39 040 2140205
+39-040-2140266
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acrise@ogs.trieste.it
A. Giorgetti, OGS, Italy (agiorgetti@ogs.trieste.it)
10/05/2005
10/05/2005
OGS, Trieste, Italy
10/05/2005