1. Norwegian Polar Institute; Fram Centre; Tromsø Norway
2. Now at Institute of Marine Research; Tromsø Norway
3. Department of Earth and Space Science and Engineering; York University; Toronto Ontario Canada
4. Department of Earth and Atmospheric Sciences; University of Alberta; Edmonton Alberta Canada
5. Now at Multiconsult; Tromsø Norway
6. Alfred Wegener Institute; Helmholtz Centre for Polar and Marine Research; Bremerhaven Germany