Trends and Variability of North Pacific Polar Lows
Figure 3
(a) Density distribution of first appearance of Polar Lows. Unit: detected Polar Lows per 0.4° grid box. (b) Subregions R1–12, for which statistics of Polar Lows were aggregated: the total number, the mean number per Polar Low season (mean), year-to-year standard deviation (std. dev.), and number of Polar Lows per number of no land grid points in the subregion (weighted mean).
