@article {ARC22117, title = {Multi-decadal changes in tundra environments and ecosystems: synthesis of the International Polar Year-Back to the Future project (IPY-BTF)}, journal = {Ambio}, volume = {40}, year = {2011}, pages = {705-16}, isbn = {0044-7447 (Linking)}, doi = {10.1007/s13280-011-0179-8}, author = {Terry V. Callaghan and Craig E. Tweedie and J. Akerman and C. Andrews and J. Bergstedt and M. G. Butler and Torben R Christensen and D. Cooley and U. Dahlberg and R. K. Danby and F. J. Dani{\"e}ls and J. G. de Molenaar and J. Dick and C. E. Mortensen and D. Ebert-May and U. Emanuelsson and H. Eriksson and H. Heden{\r a}s and Gregory H. R. Henry and David S. Hik and John E. Hobbie and E. J. Jantze and C. Jaspers and C. Johansson and M. Johansson and David R. Johnson and Jill F Johnstone and C. Jonasson and C. Kennedy and A. J. Kenney and F. Keuper and Saewan Koh and C. J. Krebs and H. Lantuit and Mark J. Lara and D. H. Lin and V. L. Lougheed and J. Madsen and N. Matveyeva and D. C. Mcewen and Isla H. Myers-Smith and Y. L. Narozhniy and H. Olsson and V. A. Pohjola and L. W. Price and F. Rig{\'e}t and S. Rundqvist and A. Sandstr{\"o}m and M. P. Tamstorf and R. van Bogaert and Sandra Villarreal and Patrick J. Webber and V. A. Zemtsov} }