A037 EMPIRICAL INVERSION OF HEM DATA FOR SEA ICE THICKNESS MAPPING Summary 1 Since 2001 the Alfred Wegener Institute for Polar and Marine Research in Bremerhaven (AWI) has operated a purpose built unique HEM system to map sea ice thickness in the Arctic and Antarctic. To determine the sea ice thickness from the measured EM field we use an empirical curve fitting approach. The master curve is tuned for every flight leg using measurements over open water between the ice floes in leads or polynyas. The level ice thickness which is a key value for sea ice science and climate


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