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  • During austral summer1996/97 the National Institute of Oceanography and Applied Geophysics - OGS, on board the research vessel OGS-Explora, conducted marine geological and geophysical surveys along the Antarctic Peninsula. The SEDANO II (SEdiment Drifts of the ANtarctic Offshore) programme was the continuation of SEDANO I , acquired in 1995 (SDLS-47). This interdiciplinary programme included geology, geophysics and oceanography for the study of the sedimentary sequences of the continental rise of the Pacific Margin in the Antarctic Peninsula. During this programme 712 km of 60-fold multichannel seismic reflection (MCS) data, 8 second records, 2 ms sample rate and 286 km of single channel seismic reflection (SCS) data, 3 seconds, 1 ms sample rate, were recorded on a SERCEL SN 358 DMX system. The source consisted of an airgun array with a total volume of 60 litres, fired every 25 meters into a 3000 m cable consisting of 120 hydrophone groups towed at an average depth of 12 m for the MCS data. The SCS data were acquired every 12,5 meters into a 18 m cable consisting of 8 hydrophone groups towed at an average depth of 3 m, except line IT97AP242H acquired every 25 m, 8 seconds and 2 ms sample rate. A GPS + TRANSIT satellite receiver system was used for navigation. The Chief Scientists on this programme was: Angelo Camerlenghi of the National Institute of Oceanography and Applied Geophysics - OGS, Borgo Grotta Gigante n. 42/C, 34010 Sgonico (Trieste), Italy. Processing of the MCS data generally followed a conventional sequence: Reformat, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Trace weighting, Stack, Mixing, Filter, Dynamic trace equalisation. The SCS data were processed using the following sequence: Reformat, Quality control, Deconvolution, Sum traces (from 8 to 1), Mute, Mixing, Filter, Dynamic trace equalisation.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • During austral summer 1994/95, the National Institute of Oceanography and Applied Geophysics - OGS, on board the research vessel OGS-Explora, conducted marine geological and geophysical surveys along the Antarctic Peninsula. The SERDRAKE (SEismicResearch in DRAKE passage) programme was a seismic exploration cruise across the Central Scotia Sea, from the South Orkney Islands to the Falkland Plateau; data were collected between longitude 42 and 47 degrees West, and latitude 51 and 60 degrees South. During this programme 1052 km of 30-fold multichannel seismic reflection (MCS) data, 14 second records, 4 ms sample rate, were recorded on a SERCEL SN 358 DMX system. The source consisted of an airgun array with a total volume of 80 litres fired every 50 meters into a 3000 m cable consisting of 120 hydrophone groups towed at an average depth of 12 m. A GPS + TRANSIT satellite receiver system was used for navigation. The Chief Scientist on this programme was: Michele Pipan of the Dipartimento di Scienze Geologiche Ambientali e Marine of the Università di Trieste, via Weiss n.2, 34127 Trieste, Italy. Processing of the data generally followed a conventional sequence: Reformat, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Stack, Mixing, Filter, and Dynamic trace equalisation.

  • IX Antarctic Campaign - Leg 3 Bathythermograph

  • IX Antarctic Campaign - Leg 3 Bathythermograph

  • During austral summer1994/95, the National Institute of Oceanography and Applied Geophysics - OGS, on board the research vessel OGS-Explora, conducted marine geological and geophysical surveys along the Antarctic Peninsula. The ANGELINA (ANtarctic GEophysical Long range INternational Acquisition) programme was a seismic exploration cruise in the Adelaide Fracture Zone on the Pacific Margin, near Marguerite Bay and Adelaide Island; data were collected between longitude 68 and 74 degrees West, and latitude 66 and 69 degrees South. During this programme 610 km of 20-fold multichannel seismic reflection (MCS) data, 20 second records, 4 ms sample rate, were recorded on a SERCEL SN 358 DMX system. The source consisted of an airgun array with a total volume of 75 litres fired every 75 meters into a 3000 m cable consisting of 120 hydrophone groups towed at an average depth of 10 m. A GPS + TRANSIT satellite receiver system was used for navigation. The Chief Scientist on this programme was: Michele Pipan of the Dipartimento di Scienze Geologiche Ambientali e Marine of the Università di Trieste, via Weiss n.2, 34127 Trieste, Italy. Processing of the data generally followed a conventional sequence: Reformat, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Stack, Mixing, Filter, and Dynamic trace equalisation.