Sea ice, rain-on-snow and tundra reindeer nomadism in Arctic Russia von Forbes, B, Kumpula, T, Meschtyb, N, Laptander, R, Macias-Fauria, M, Zetterberg, P, Verdonen, M, Skarin, A, Kim, K, Boisvert, L, Stroeve, J, Bartsch, A