(a)
(b)
(c)
(d)
Figure 8:
Correlation coefficient for JFM cyclone frequency versus NAO (excluding PNA and ENSO). Correlation (shaded) 2-tailed 95% significance (hatched) for (a) NCEP1_5801, (b) ERA40_5801, (c) NCEP1_7910, and (d) NCEP1_5078.