1. Laboratoire de Glaciologie et Géophysique de l'Environnement (CNRS/UJF), Grenoble, France.
2. Laboratoire des Sciences du Climat et de l'Environnement (CEA/CNRS/UVSQ-IPSL), Gif-sur-Yvette, France.
3. Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.
4. Physics Institute, University of Bern, Bern, Switzerland.
5. Department of Environmental Sciences, University of Venice, Venice, Italy.
6. Institute for the Dynamics of Environmental Processes–CNR, University of Venice, Venice, Italy.