NAO & Tropical Gradient

Figure 4　(b) five-year running mean dipole (solid line) and NAO indices (dashed line)

EOF 1 (unfiltered)

EOF 2 (unfiltered)

PC 1 & 2

Figure 5　The two leading EOFs for the annual mean SST anomalies in the tropical (20°N-20°S) Atlantic (upper and middle panels). The percentage of variance explained on this time scale is indicated in the upper right corner at each panel.. Contour interval is 0.02. Positive (negative) values are represented by solid (dashed) Iines. The bottom panel presents the principal component (PC) of the first (solid line) and second (dashed line) EOFs.

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