Figure 3.13 Historical variability in regionally-averaged annual maximum snow water equivalent anomalies (SWEmax) (Jan–May period; with respect to the 1981–2010 average) over all snow surveys in the Russian Arctic with at least 40 years of data in the period 1967–2011 following the regional averaging method described in Figure 3.8. The annual SWEmax series is significantly correlated (r=0.80) with the annual maximum snow depth series shown in Figure 3.11. The red line is the result of applying a centered 9-term binomial filter. There is no trend over the period of data shown.