Interannual Variability of Northern Hemisphere Storm Tracks in Coarse-Gridded Datasets
Figure 4
OND cyclone track frequency composite for (a) IOD positive relative to negative for NCEP1_5801 (shaded). 2-tailed 90% significance (hatched), (b) like (a) but for ERA40_5801 Units: number of storms per winter for a 5° × 5° box.
