Figure 7. Monthly time series for large area averages for the NH extratropics (20°N-60°N), tropics (20°N-20°S) and SH extratropics (20°S-45°S) in °C. Shown are the SST time series from NCEP EOF and the differences GISST–(NCEP EOF), GISST–(NCEP OI), and (NCEP EOF)–(NCEP OI).
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