1. Swedish Museum of Natural History P.O. Box 50007 10405 Stockholm Sweden
2. Värriö Research Station Institute for Atmospheric and Earth System Research INAR/Physics University of Helsinki P.O. Box 64 Helsinki 00014, Finland
3. Department of Physical Geography Stockholm University 10691 Stockholm Sweden
4. Department of Geosciences and Geography University of Helsinki P.O. Box 64 Helsinki 00014, Finland
5. Ecosystems and Environment Research Programme Faculty of Biological and Environmental Sciences University of Helsinki Niemenkatu 73 15140 Lahti Finland
6. Environnements et Paléoenvironnements Océaniques et Continentaux UMR 5805 Université de Bordeaux Geography P.O. Box 64 Pessac France
7. Ecosystems and Environment Research Programme ECRU Faculty of Biological and Environmental Sciences University of Helsinki P.O. Box 64 00014 Finland