Table 2: Linear temperature trends (°C per decade) in different time periods for stations in the Svalbard region. Trends significant at the 5% level are bold (Mann-Kendall nonparametric test [21]).

Location Annual Winter Spring Summer Autumn 1920–1942 Svalbard Airport* 0.34 1.23 0.09 −0.28 0.47 Bjørnøya 0.14 −0.55 −0.35 0.18 0.66 1943–1965 Ny-Ålesund* −0.26 −1.48 0.07 0.04 0.39 Svalbard Airport* −0.35 −1.76 −0.22 −0.00 0.58 Bjørnøya −0.33 −0.91 −0.19 −0.29 0.14 1966–1988 Ny-Ålesund* 0.38 0.54 0.73 0.10 0.51 Svalbard Airport* 0.52 0.72 0.96 0.27 0.48 Hopen 0.26 0.00 0.49 0.14 0.57 Bjørnøya 0.34 0.53 0.71 −0.03 0.36 1989–2011 Ny-Ålesund 0.99 2.52 0.46 0.50 0.78 Svalbard Airport 1.25 2.88 0.60 0.76 1.14 Hopen 1.21 2.89 0.46 0.18 1.50 Bjørnøya 0.91 2.01 0.86 0.32 1.14 1975–2011 Ny-Ålesund 0.73 1.36 0.60 0.33 0.53 1975–2011 Svalbard Airport 1.04 1.66 0.98 0.55 0.86 1975–2011 Hopen 1.10 1.76 1.02 0.43 1.00 1975–2011 Bjørnøya 0.76 1.30 0.59 0.39 0.62 1935–2011 Ny-Ålesund* 0.11 −0.02 0.27 0.09 0.07 1912–2011 Svalbard Airport* 0.25 0.25 0.46 0.11 0.19 1946–2011 Hopen 0.31 0.31 0.44 0.22 0.23 1920–2011 Bjørnøya 0.11 0.02 0.29 0.08 0.05

*The Svalbard Airport and Ny-Ålesund series are homogenised composites from other sites before 1975, respectively, 1969 [11].