1. A matter of divergence: Tracking recent warming at hemispheric scales using tree ring data Wilson, R.; D'Arrigo, Rosanne Dorothy; Buckley, Brendan M.; Buntgen, U.; Esper, J.; Frank, D.; Luckman, B.; Payette, S.; Vose, R.; Youngblut, D. 2007 Articles PaleoclimatologyHydrology