Science Service System

Summary of Proposal OCE2431

TitleObservation of Polynias with a combination of various satellite sensors and modelsimulations
Investigator Hollands, Thomas - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Klimawissenschaften
Team Members
Dr. Dierking, Wolfgang - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Klimawissenschaften
Dr. Linow, Stefanie - Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Klimawissenschaften
SummaryCoastal polynias are ice-free areas in the sea ice covered regions close to the shorelines of Antarctica and around the Arctic. They occur when strong winds or ocean currents move the ice away from the coast. Due to the lack of the insulating sea ice cover, there is an increased amount of heat exchange in these areas as well as an increased production of new ice. Since the evolution of coastal polynias is a dynamic event generating visible changes within a few hours, it is a demanding task for satellite remote sensing. On the other hand it offers the chance to study various aspects of ocean - sea ice - atmosphere interactions in a relatively small area. We want to analyse the evolution of polynia events with the help of active microwave sensors operated at different frequency bands (L, C, X- Bands) and polarisations, supported by optical and thermal infrared data as well as passive microwave data. The goal is to improve the classification of sea ice in and around polynias and study its kinematics. The results of this study will also be used to assess the potential of the upcoming Sentinel satellite missions for polynia research.

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