Complementary with the ODYSSEA project funded by PNRA, ANTSSS aimed at finding evidence for Late Pleistocene sedimentary signatures of major changes in the extent of grounded, marine based ice sheets in the Ross Sea, as preserved in slope/ rise drift deposits by means of seismic and oceanographic data. During the 2017 expedition, OGS Explora collected over 450 km of Single Channel Seismics (SCS), 1575 km2 of bathymetry, >500 km of sub-bottom, and oceanographic data, including Conductivity Temperature Depth (CTD), Acoustic Doppler Current Profiler (ADCP), Lowered-ADCP, Expendable Bathythermograph (XBT) and turbidity data. Part of the seismic data have been initially published in Gales et al. (2021) Role of dense shelf water in the development of Antarctic submarine canyon morphology. Geomorphology, 372, art. no. 107453. DOI: 10.1016/j.geomorph.2020.107453

High-resolution multichannel seismic profiles have been collected in January–March 2017 by OGS on the continental rise off the Sabrina Coast (East Antarctica). The data were acquired as part of the Italian Program of Antarctic Research (PNRA) TYTAN “Totten Glacier dynamics and Southern Ocean circulation impact on depositional processes since the Mid- to Late Cenozoic” project (PI: F. Donda-OGS) during the Australian Marine National Facility survey IN2017-V01 on board the RV Investigator. TYTAN was embedded in to the Australian project "Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles” that aimed to understand the interaction of Totten Glacier and its ice drainage basin with the Southern Ocean during periods of warming and ice-sheet retreat in the Pleistocene and Holocene. In order to achieve these scientific objectives, three areas were identified for the geophysical and oceanographic survey: two on the continental slope and rise off Sabrina Coast and one on the continental shelf, which was not investigated because it remained covered by sea ice throughout the season. Expanded and well-preserved sedimentary successions imaged on the TYTAN seismic data highlight the potential of this region for deep ocean drilling, which will provide unprecedented history of the glaciers evolution in the Aurora Basin and their sensitivity to climate change under different background state conditions. In fact, TYTAN seismic data played a crucial role in the identification of potential drilling sites for the IODP 1002 Proposal “Totten Glacier Climate Vulnerability under varying Neogene climate conditions: Lessons for East Antarctic Ice Sheet climate sensitivity” (under review).

In Austral Summer 1994-95 the National Institute of Oceanography and Applied Geophysics - OGS conducted marine geological and geophysical surveys over the Antarctic Peninsular. During this cruise five (5) research programmes were conducted for a total approximately of 4469 km of multichannel seismic reflection (MCS) data. The research programmes were: SEDANO (SEdiment Drifts of the ANtarctic Offshore) with 1340 km of MCS data ; SITE SURVEY, ODP Proposal # 452 (Antarctic Glacial History and Sea-Level Change) with 507 km of MCS data; SANSCRITO (Seismic ANalysis SCotia Ridge Tectonic Outcome) with 1990 km of MCS data and ANGELINA (ANtarctic GEophysical Long range INternational Acquisition programme) with 632 km of MCS data. During the Programme SEDANO nine (9) 60-fold multichannel seismic lines were collected in the Antarctic Peninsular. The surveys were carried out by the research vessel OGS Explora. The digital MCS data were recorded on a SERCEL SN 358 DMX system. The source consisted of two GI guns with a total volume of 6.7 litres fired approximately every 25 meters into a 3000 m cable consisting of 120 hydrophone groups for the 60-fold profiles. A GPS + TRANSIT satellite receiver system was used for the navigation. The Chief Scientist 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 data generally followed a conventional sequence: Reformat, Trace-sum with differential NMO, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Trace weighting, Stack, Filter, Balance.

In Austral Summer 1994-95 the National Institute of Oceanography and Applied Geophysics - OGS conducted marine geological and geophysical surveys over the Antarctic Peninsular. During this cruise five (5) research programmes were conducted for a total approximately of 4469 km of multichannel seismic reflection (MCS) data. The research programmes were: SEDANO (SEdiment Drifts of the ANtarctic Offshore) with 1340 km of MCS data; SITE SURVEY, ODP Proposal # 452 (Antarctic Glacial History and Sea-Level Change) with 507 km of MCS data; SANSCRITO (Seismic ANalysis SCotia Ridge Tectonic Outcome) with 1990 km of MCS data and ANGELINA (ANtarctic GEophysical Long range INternational Acquisition programme) with 632 km of MCS data. The surveys were carried out by the research vessel OGS Explora. The digital MCS data were recorded on a SERCEL SN 358 DMX system. The source consisted of two GI guns with a total volume of 6.7 litres fired approximately every 25 meters into a 1500 m cable consisting of 120 hydrophone groups for the 30-fold profiles. A GPS + TRANSIT satellite receiver system was used for the navigation. Processing of the data followed a detailed sequence: Quality control, Amplitude recovery, Deconvolution, Velocity analysis, Multiples attenuation, NMO corrections, Mute, Trace weighting, Stack, F-X Deconvolution,Filter, Balance.

In December 1989 the National Institute of Oceanography and Applied Geophysics - OGS conducted marine geological and geophysical surveys off the Pacific Margin of the Antarctic Peninsula, in the Weddell Sea and over Admundsen Sea. This cruise collected approximately 3,478.4 km of 30-fold multichannel seismic reflection (MCS) data. The surveys extended between longitudes 41 and 99 degrees west, and between latitudes 61 and 69 degrees south. The surveys were carried out by the research vessel OGS Explora. The digital MCS data were recorded on a SERCEL SN 358 DMX system. The source consisted of an airgun array with a total volume of 45.16 litres fired approximately every 50 meters. A GPS + TRANSIT satellite receiver system was used for navigation. Processing of the data generally followed a conventional sequence: Reformat, Trace-sum with differential NMO, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Trace weighting, Stack, Mixing, Filter, Balance.

Complementary with the ANTSSS project funded by EUROFLEETS, ODYSSEA aimed at investigating the sediment drifts to the west of the Hillary Canyon (Ross Sea continental margin) by means of seismic and oceanographic data to contribute to the understanding of past and present ocean dynamics and glacial history of this Antarctic sector. During the 32nd PNRA expedition, OGS Explora collected over 240 km of Single Channel Seismics (SCS), 2700 km2 of bathymetry, 500 km of sub-bottom, 6 gravity cores for a total of nearly 30 m of sediments, 4 box cores, 25 XBT launches, 2 rosette casts with water sampling, CTD, L-ADCP, turbidity and florescence probes. Part of the seismic data have been initially published in Conte R et al (2021) Bottom current control on sediment deposition between the Iselin Bank and the Hillary Canyon (Antarctica) since the late Miocene: An integrated seismic-oceanographic approach. Deep-Sea Research Part I: Oceanographic Research Papers 176, art. no. 103606, DOI: 10.1016/j.dsr.2021.103606

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.

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. During this cruise there were several research programmes; TENAP, BSR and SEDANO II. The TENAP (cenozoic Tectonic Evolutionof the Northem Antarctic Peninsula) programme was a geological and geophysical research project to study the Cenozoic tectonic evolution of the Antartic Peninsula and its borders; data were collected between longitude 59 and 66 degrees West, and latitude 61 and 64 degrees South. During this programme 702.5 km of 30-fold multichannel seismic reflection (MCS) data, 16 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 60.5 litres, using the Single Bubble methodology, 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 Scientists on this programme was: Giulio Pellis of the Dipartimento di Ingegneria Civile e Ambientale of the Università di Trieste, Piazzale Europa n. 1, 34127 Trieste, Italy. Processing of the 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.

In Austral Summer 1994-95 the National Institute of Oceanography and Applied Geophysics - OGS conducted marine geological and geophysical surveys over the Antarctic Peninsular. During this cruise five (5) research programmes were conducted for a total approximately of 4469 km of multichannel seismic reflection (MCS) data. The research programmes were: SEDANO (SEdiment Drifts of the ANtarctic Offshore) with 1340 km of MCS data ; SITE SURVEY, ODP Proposal # 452 (Antarctic Glacial History and Sea-Level Change) with 507 km of MCS data; SANSCRITO (Seismic ANalysis SCotia Ridge Tectonic Outcome) with 1990 km of MCS data and ANGELINA (ANtarctic GEophysical Long range INternational Acquisition programme) with 632 km of MCS data. During the Programme SEDANO nine (9) 60-fold multichannel seismic lines were collected in the Antarctic Peninsular. The surveys were carried out by the research vessel OGS Explora. The digital MCS data were recorded on a SERCEL SN 358 DMX system. The source consisted of two GI guns with a total volume of 6.7 litres fired approximately every 25 meters into a 3000 m cable consisting of 120 hydrophone groups for the 60-fold profiles. A GPS + TRANSIT satellite receiver system was used for the navigation. The Chief Scientist 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 data generally followed a conventional sequence: Reformat, Trace-sum with differential NMO, Quality control, Amplitude recovery, Deconvolution, Velocity analysis, NMO corrections, Mute, Trace weighting, Stack, Filter, Balance.

High-resolution multichannel seismic profiles have been collected in January–March 2017 by OGS on the continental rise off the Sabrina Coast (East Antarctica). The data were acquired as part of the Italian Program of Antarctic Research (PNRA) TYTAN “Totten Glacier dynamics and Southern Ocean circulation impact on depositional processes since the Mid- to Late Cenozoic” project (PI: F. Donda-OGS) during the Australian Marine National Facility survey IN2017-V01 on board the RV Investigator. TYTAN was embedded in to the Australian project "Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles” that aimed to understand the interaction of Totten Glacier and its ice drainage basin with the Southern Ocean during periods of warming and ice-sheet retreat in the Pleistocene and Holocene. In order to achieve these scientific objectives, three areas were identified for the geophysical and oceanographic survey: two on the continental slope and rise off Sabrina Coast and one on the continental shelf, which was not investigated because it remained covered by sea ice throughout the season. Expanded and well-preserved sedimentary successions imaged on the TYTAN seismic data highlight the potential of this region for deep ocean drilling, which will provide unprecedented history of the glaciers evolution in the Aurora Basin and their sensitivity to climate change under different background state conditions. In fact, TYTAN seismic data played a crucial role in the identification of potential drilling sites for the IODP 1002 Proposal “Totten Glacier Climate Vulnerability under varying Neogene climate conditions: Lessons for East Antarctic Ice Sheet climate sensitivity” (under review).