Sea ice thickness from airborne laser scanning Sine M. Hvidegaard, Rene Forsberg, Henriette Skourup, and others.

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Sea ice thickness from airborne laser scanning Sine M. Hvidegaard, Rene Forsberg, Henriette Skourup, and others

2DTU Space, Technical University of Denmark 19th April 2008 Red: airborne laser flight Blue: In situ observations West Greenland 2008

3DTU Space, Technical University of Denmark Validation of sea ice freeboard to thickness

4DTU Space, Technical University of Denmark SitePositionIn Situ observation Area mean from scanner, 40x40 m HE N W0.80 m HE N W1.07 m1.65 m HE N W1.03 m1.38 m HE N W0.88 m1.08 m HE N W1.07 m0.70 m HE N W0.38 m0.69 m Calibration of thickness using in situ obs.

5DTU Space, Technical University of Denmark Existing data Baffin Bay 2006 and 2008 data calibrated with use of in situ data from drillings (helicopter landings) data based on climatology All data is collected in early to mid May

6DTU Space, Technical University of Denmark Existing data East Greenland 2.5 m (0-5 m) April

7DTU Space, Technical University of Denmark Mean sea ice thickness Only based on radar altimetry from winter (October – March) Thin ice is not included Similar observations with higher accuracy and spatial reolution will be available from CryoSat (launched April 2010) Validation campaign planned for April- May 2011 (Greenland, Arctic Ocean and Svalbard) m m S. Laxon, Nature 2003 Havis tykkelser set fra satellit - radar CryoSat