First Author:   Hege Westskog CICERO - Centre for International Climate and Environmental Research hege.westskog@cicero.uio.no   Oslo, N-0318, Norway   +4794307077(Phone) +4794307077(Fax) http://cicero.uio.no/home Second Author: Håkon Sælen CICERO - Centre for International Climate and Environmental Research h.g.salen@cicero.uio.no   P.B. 1129 Blindern Oslo, N-0318, Norway       http://cicero.uio.no/home/ Third Author: Einar Strumse Lillehammer University College einar.strumse@hil.no   PO Box 952 Lillehammer, N-2604, Norway       http://www.hil.no/