Cecilia Johansson,^* Veijo A. Pohjola,^** Christer Jonasson,^*** Terry V. Callaghan<sup>****


*</sup>Cecilia Johansson () is a Senior lecturer in Meteorology at Department of Earth Sciences, Uppsala University, Sweden. Her research interest includes boundary layer meteorology, climatology and snow physics. Address: Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden. e-mail: Cecilia.Johansson@met.uu.se
^**Veijo A. Pohjola is a Professor in Physical geography at the Department of Earth Sciences, Uppsala University, Sweden. He is a glaciologist, with interests in Arctic glacier mass balance, and in ice core records. Address: Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden. e-mail: veijo.pohjola@geo.uu.se
^***Christer Jonasson has a PhD in Physical Geography from Uppsala University and is Associate professor at Stockholm University. He is Station Manager for the Abisko Scientific Research Station. Address: Abisko Scientific Research Station, Swedish Polar Research Secretariat, 981 07 Abisko, Sweden. e-mail : christer.jonasson@ans.polar.se
^****Terry V. Callaghan is a Distinguished Research Professor at the Royal Swedish Academy of Sciences and Professor of Arctic Ecology at Universities of Sheffield, UK and Lund, Sweden. He specializes in arctic ecology, and climate and UV-B radiation impacts on arctic ecosystems. Address: Royal Swedish Academy of Sciences, PO Box 50005, 104 05 Stockholm, Sweden. Address: Sheffield Centre for Arctic Ecology, Department of Plant and Animal Sciences, University of Sheffield, Sheffield S10 5BR, UK. e-mail: terry_callaghan@btinternet.com