Regression for Dipole Index

Figure 3　The simultaneous regression pattern of the Atlantic SST for the dipole index. Contour interval is 0.2 ℃. Positive (negative) values are represented by the solid (dashed) Iines. Dark (light) shaded are the regions in which regressions are more than 0.4℃ (less than -0.4 ℃).

SLP regressions for the Gradient Index	Wind regeressions for the Gradient Index

Figure 4　(a) The simultaneous regression patterns of SLP (left panel) and wind vector (right panel) fields based on the dipole index. Contour interval is 0.2 hPa for SLP fields. Positive (negative) values are represented by the solid (dashed) lines. The reference wind speed (1.6 ms^-1) are indicated on the bottom of panels.

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