Separating Wave and Ice Signatures from Shipbased Lidar and IR Thermometer

During the Sea State field program in autumn 2015 in the Beaufort Sea, the research ship R/V Sikuliaq was primarily sampling first year ice with the full range of ice concentrations. Significant waves of up to 4.5 m were observed as well as large areas of a variety of ice. Ice thickness were usually less than 30 cm, though sparse multi-year floes up to a few meters thick or ridging first-year ice were also encountered. Frequently, waves were observed to be propagating through the ice. These scenes were sampled with a variety of instrumentation, including a scanning and a fixed Riegl lidars and two fast-response KT-15 radiometers. Wave heights and periods usually obtained from the lidars in open water are contaminated by the surface roughness provided by the ice in these mixed ice-water environments. This presentation will demonstrate the complexities in the instrument signals provided by this environment and explore how signals from these and other instruments can be used together to extract the desired physical parameters