LASER SCANNING IN ARCTIC SEA ICE RESEARCH

摘要

Development of offshore installations in ice covered areas requires knowledge of geometrical characteristics of above water parts of sea ice ridges and icebergs. A novel tool to attain this data is laser scanning. The quality, precision, speed and amount of data from laser scanning are much greater than that from traditional methods such as use of theodolite for reconstruction of surface morphology. This paper presents our experiences using the laser scanner Riegl VZ-1000 in sea ice research applications in the high arctic. The applications include data from ice ridges and icebergs. Focus is put on methods to extract useful information from the large amount of data collected. It includes description of ridge sail characteristics (orientation of ridge lines, their length, local width and height, sizes of ice blocks), calculation of icebergs volume. Possibilities to combine the geometrical data from the scans with temperature measurements are also discussed.