Arctic Climate Processes Linked Through the Circulation of the Atmosphere
The climate of the Arctic is the product of a range of processes, involving not only the atmosphere but also the ocean, sea ice, land-surface conditions, and snow cover. These processes are linked through the atmospheric circulation. The circulation moves weather systems across the Arctic and controls surface climate and snow cover. It transports heat, water vapour, and aerosol particles from the midlatitudes into the Arctic, it distributes these quantities within the Arctic, and it affects sea ice through wind stress. At the same time, atmospheric circulation is affected by the energy balance of the Arctic surface and thus by sea-ice and snow cover as well as by factors outside the Arctic. The goal of the project is to study the role of these interactions for decadal variability and trends in Arctic climate. The five partners University of Bern (Switzerland), RIHMI (Russia), University of Vigo (Spain), Alfred Wegener Institute, Potsdam (Germany) and NILU (Norway) will use newly available observation based data sets, long reanalyses, numerical techniques such as trajectory modeling or nudging, and different climate models that allow addressing effects of sea-ice and snow cover. The knowledge gained from better understanding the processes governing decadal climate variability in the Arctic may eventually lead to a better assessment of climate models, supporting an increased accuracy of seasonal predictions, projections, and adaptation plans.
Martin Wegmann, Prof. Dr. Stefan Brönnimann
"ERAnet.RUS" programme, FP7
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