Optical properties for sea ice measured during LEADEX '92

A green laser, Ne:YAG (532 nm), was used to make both in situ and field laboratory measurements of transmission loss and spreading through samples of sea ice and snow collected from the Beaufort Sea during the LEADEX '92 experiment. The sea ice types sampled include first year (FY), multiyear (MY), melt pond (MP), and various stages of young lead ice (LD). Laboratory samples were taken from cores and placed in the collimated beam of the field portable instrument where losses and spreading were measured with a linear photodetector array. Comparable in situ measurements were made on lead ice and first year ice types by placing the laser source beneath the ice sheet and measuring the transmission and the beam spread function (BSF) at the surface. Data generated from both techniques were analyzed to characterize intrinsic beam transmission and small angle scattering optical properties.<
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