http://bolin.su.se/data/grudd-2012-tornetrask-1 Håkan Grudd Torneträsk tree ring (MXD) temperature reconstruction AD 500⁠ – ⁠2004 NOAA National Centers for Environmental Information (NCEI) 2012 Datafile Terrestrial Tree rings Paleoclimate > Land Records > Tree Rings Håkan Grudd 2012-01-11T23:44:17+00:00 English 1 The data should be cited appropriately.