1. Potsdam Institute for Climate Impact Research (PIK), RD1, Member of the Leibniz Association Potsdam Germany
2. Laboratoire de Météorologie Dynamique (LMD) Sorbonne University (SU), Ecole Normale Supérieure (ENS) Paris France
3. Department of Environmental Systems Science ETH Zurich Zurich Switzerland
4. Physical Oceanography and Instrumentation Department, Leibniz Institute for Baltic Sea Research Warnemünde (IOW) Rostock Germany
5. Center for Environmental Prediction Rutgers The State University of New Jersey New Brunswick New Jersey USA