Table 2: Periods and growth rates of selected modes for the 1949–68 NCEP/NCAR basic state with standard parameterizations (m4 s−1, K, K m−1), their mode number, and class of mode. Also shown are the largest pattern correlations between a given mode and the modes for the 1997–2006 NCEP/NCAR basic state with standard parameterizations and the 1997–2006 mode for which the pattern correlation is largest as well as the change in the growth rate .

Class  Mode Mode 1949–68 (days) (day−1) (days) (day−1)   1997–2006   SH cyclogenesis 1 1.20 0.4250 1.33 0.2663 0.8960 12 −37.3% ML blocking 30 6.11 0.2566 6.27 0.2074 0.6399 26 −19.2% HL blocking 8 7.40 0.3495 8.01 0.3500 0.7644 5 +0.1% HL blocking 11 5.22 0.3184 4.99 0.3060 0.8028 6 −3.9% NWCB 43 8.01 0.2100 7.97 0.3054 0.6374 7 +45.4% Antarctic 6 13.08 0.3624 20.0 0.3810 0.9071 3 +4.9% Antarctic 26 52.1 0.2746 0.2850 0.6475 10 +3.8% ISO 57 59.0 0.1444 25.4 0.1886 0.5744 33 +30.6% African EW 22 4.14 0.2881 3.86 0.3035 0.7638 8 +5.3%