The theme of this research project is to relate the nature of ocean climate change over the last 2,000 years in a critical and hitherto almost inaccessible part of the Arctic Ocean to the ways in which current rapid climate change manifests itself in the changing nature of the ice cover.
The objective of GreenICE is to measure the changes in the structure and dynamics of sea ice that have occurred in a critical region of the Arctic Ocean as a result of a switch in Arctic atmospheric circulation due to the Arctic Oscillation, and to examine whether we can relate these to the long-term (>2000 year) record of variability in the same region retrieved from sediment cores.
DTU leads the remote sensing program, in particular the mapping of large and meso scale ice motion from satellite active and passive microwave observations. Automatic methods for deriving large scale ice motion from passive microwave observations have been developed in the EC project Sealion, and applied to 20 years of data from the Southern Ocean. These methods will be further refined in this project, in order to improve the spatial resolution in the area north of Greenland where the atmospheric contribution/disturbance will be substantially smaller than in the Southern Ocean. In collaboration with AWI, DTU will use the satellite derived ice motion data to test and validate the ice velocities calculated by the large scale ice model. A historical analysis of the mesoscale ice motion in the coastal regions including the fjords will be carried out using a variety of data, primarily from the ERS and RADARSAT Synthetic Aperture Radars (SAR), but supplemented by available visible and infrared images.