Figure 2

Monthly mean temperature differences (Unit: °C). (a–c) Represent differences in the 1980s, 1990s and 2000s; (d–f) are the same as (a–c), but for summer. Hatching denotes regions with the significance at 95% confidence level. The maps in the figure were created by C.F. using NCL 6.5 (http://www.ncl.ucar.edu/).