Tree-ring δ 18 O and δ 2 H stable isotopes reflect the global meteoric water line by Arosio, T, Büntgen, U, Nicolussi, K, Moseley, GE, Saurer, M, Pichler, T, Smith, MP, Gutierrez, E, Andreu-Hayles, L, Hajdas, I, Bebchuk, T, Leuenberger, M