Bremen 2017 – scientific programme

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UP: Fachverband Umweltphysik

UP 3: Kryosphäre

UP 3.3: Talk

Tuesday, March 14, 2017, 11:45–12:00, GW2 B3009

changes in Arctic sea ice dynamics observed by satellites — •Alexandra Kazlova and Gunnar Spreen — IUP, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany

From buoy and satellite observations it is known that Arctic sea ice speed and deformation has increased during recent decades by 10*15% per decade. Buoys, however, do not cover the complete Arctic Basin and the number and location of observations changes with time. Satellite observations were not yet fully analysed for long-term ice deformation changes, which is the topic of this study. How much the different elements in the sea ice force balance have contributed to the observed changes in sea ice dynamics is not fully understood. Here, different satellite remote sensing datasets of sea ice drift and deformation are analyzed for changes in space and time (e.g., trend patterns). Synthetic Aperture Radar (SAR) satellite observations deliver high resolution, all weather and season observations of the Arctic sea ice cover since the 1990s. Recently, with the launches of Sentinel-1a & b this dataset got much more extensive. Available SAR datasets of sea ice drift and deformation are analyzed for changes in space and time (e.g., trend patterns). Findings will contribute to better quantify the changes in Arctic sea ice dynamics and help evaluate sea-ice models.