1. Laboratory of Ecohydrology ECHO/IIE/ENAC; Ecole Polytechinque Federale de Lausanne; Lausanne Switzerland
2. Hubbard Brook Experimental Forest; U.S. Forest Service Northern Research Station; North Woodstock NH USA
3. Dipartimento ICEA; Università degli studi di Padova; Padua Italy
4. Cary Institute of Ecosystem Studies; Millbrook NY USA
5. Department of Ecology and Evolutionary Biology; University of Connecticut; Storrs CT USA
6. Virginia Water Resources Research Center and Department of Forest Resources and Environmental Conservation; Virginia Tech; Blacksburg VA USA