34356b14-13c9-4fc7-aae7-7977be4b89bb eng; CAN Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca 2022-04-08T12:59:52 North American Profile of ISO 19115:2003 2009-01-01 https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=12732 Acoustic sub-bottom profiles (3.5 kHz) from the CCGS Amundsen (2014-2016) 2017-01-10 Lajeunesse, Patrick Lajeunesse, Patrick Joyal, Gabriel Brouard, Etienne Couette, Pierre-Olivier Trottier, Annie-Pier Lajeunesse, P., Joyal, G. (2016). Acoustic sub-bottom profiles (3.5 kHz) from the CCGS Amundsen (2014-2016) Geophysical data from a single-channel 3.5kHz sub-bottom profiler is acquired 24hrs during CCGS Amundsen’s cruises by a Knudsen 320-BR (2014 and 2015 cruises) and a 3260 (2016 cruise) sub-bottom profiler. The sounder is comped of 16 (4x4 array) transducers outputting a total of 10KW. The dataset consists of raw (keb and sgy) and processed (JPEG2000 and PNG images) data. Heave (TSS1 form the Applanix POS-MV) and GPS (ZDA, VTG, GGA from the CNAV GNSS Receiver) data are inputted to the raw data files directly during acquisition. The processing is made using the NRCAN software suite (SEGY to SGYJP2 and SegyJp2Viewer). The speed of sound is constantly set to 1500 m/s. The data are available per year (2014 to 2016) in an ESRI ArcGIS geodatabase format where shiptrack lines are linked to png images of the sub-bottom profile. The acoustic geophysical dataset is part of the core seabed mapping component of the ArcticNet Research Program : 'Mapping of Arctic Canada's Seafloor: Contributions to Global Change Science, Sustainable Resource Development, Safe Navigation of the Northwest Passage, Geohazards and Arctic Sovereignty'. Acoustic mapping of the seabed relief and shallow subsurface sediments are the prime datasets used by scientists to understand the geological processes shaping the seafloor, assess natural hazards and coastal habitats and reconstruct the history of past climatic changes. The mapping results from this project are applied to several components: 1) identifying geohazards such as submarine landslides, gassy seabeds and sea ice impacts in order to manage risk to both people and the environment in the context of resource development; 2) providing improved navigational charting and alternate shipping lanes in sparsely mapped regions of the Arctic; and 3) designing seabed sampling strategies to recover sediments that will provide information on past climatic history in order to predict future climatic responses and their consequences. *related to CCIN 12586 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://metadata.arice-h2020.eu/geonetwork/srv/api/records/34356b14-13c9-4fc7-aae7-7977be4b89bb/attachments/map.png Acoustic Geomorphology Geophysical surveys Sediments Sub-bottom profiler Polar Data Catalogue Thesaurus (Canada) 2021-06-02 Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://www.polardata.ca/pdcinput/public/keywordlibrary Canadian Arctic Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse eng; CAN environment -166 -40 43 90 Time period can be either covered by the content of the dataset or the date when the data has been collected. 2014-05-01 2016-10-02 Summary: Not Applicable Research Program(s): ArcticNet. For further information: gabriel.joyal.1@ulaval.ca (upon demand) false Digital file 1.0 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca This metadata was generated from the PDC metadata database at 2021-06-02 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca