Figure 6
Spatial pattern of diurnal temperature range and duration indices. Diurnal temperature range (a), growing season length (b), cold spell duration (c), warm spell duration (d). For description of indices, see Supplementary Table S1. The size of the circles is the degree of changing. Positive trends are shown as pluses, negative trends as minuses. A green symbol indicates significance at the 5%; a white symbol represents non-significant trends. The maps are generated with Arc Map Ver 10.1 (http://www.esri.com/software/arcgis/arcgis-for-desktop).
