Delineation of ridge features with a high probability of scour in high-resolution satellite based radar imagery

• Main Authors: Phillips, Ryan, King, Tony, Howell, Carl, Burry, Daryl, Power, Des, Howell, Mark, Lynch, Mike, Bobby, Pradeep, Carter, Sue
• Format: Dataset
• Language: English
• Published: Canadian Cryospheric Information Network 2013
• Subjects: Beaufort Sea; Ice drift; Ice pack motion; Ridges; SAR; Beaufort Regional Environmental Assessment; ice pack; Sea ice
• Online Access: https://dx.doi.org/10.5443/11798; https://www.polardata.ca/pdcsearch/?doi_id=11798

DFO's Upward Looking Sonar (ULS) collected keel draft data in the Canadian Beaufort Sea. This ULS data collected between 2003 and 2008 were analyzed and 117 ice ridge keels with drafts in excess of 20 m were identified. No data were available for 2009 due to a malfunctioning ADCP unit, and no processed keel data were available for 2010 or later. Envisat and Landsat 5 and Landsat 7 archives were searched for imagery that corresponded with extreme keel events over the ULS. Imagery was identified for 29 of the 117 keel events. Using the data available during the timeframe of this study, correlation of keel and satellite data had limited success. This was attributed to several factors. The original intent of the project was to capture new satellite data and use this for correlation with the ULS ice keel data. However, as this project started late in the year, it was not possible to access ULS data in time to complete the accompanying report before the March 2012 deadline. As a consequence, available imagery archives were used instead for correlation to readily available ULS data. Additional details can be found in the attached report. : Purpose: To correlate the ice regime, as measured by satellite Synthetic Aperture Radar (SAR), with extreme deep-keeled ice features identified using keel draft data collected by DFO's Upward Looking Sonar (ULS) in the Canadian Beaufort Sea. The objectives were to: a) acquire high resolution SAR data from satellite archives, coincident in location with the ULS maintained and operated in the Canadian Beaufort by the Institute of Ocean Sciences (OSC); b) analyze the high resolution SAR data for possible ridge-like features; c) correlate ridge features to in-situ data on ice keels, as determined by the IPS; and d) from the correlation, develop a methodology to routinely analyze high resolution SAR data for the extraction of extreme ridge features. More information about this project, as well as other BREA projects, is available here:http://www.beaufortrea.ca/publications/ : Summary: Not applicable