North American "Little Ice Age" proxy records. Panels show unfiltered varve sedimentation from Lake C2 (a), and summer temperature inferred from Agassiz (b), Devon (c), and south Greenland (d) melt records, pollen from Lake of the Clouds, Minnesota (e), treeline fluctuations in northern Canada (f), and Fennoscandia (g). All data have been standardized to the reference period of 1860-1959 and in ° C units. Data for all but (a) were compiled by Bradley and Jones (1993).