1948 2012 1948 0.253 0.540 2.306 0.903 -0.568 -0.613 -0.304 -0.194 0.194 0.970 0.475 0.658 1949 1.638 1.604 -0.746 1.310 -0.459 -0.552 -0.137 -0.188 -0.483 0.895 -1.374 -0.593 1950 -0.293 0.583 -0.076 0.361 0.098 0.589 -0.528 -0.711 0.566 -0.054 -0.726 -1.704 1951 -0.207 -0.303 -2.150 -0.825 -0.805 -0.726 0.231 -0.331 -0.787 0.115 0.291 2.243 1952 0.202 -1.847 -2.033 0.701 -0.563 -0.140 0.608 0.012 -0.320 -0.386 -1.822 -1.522 1953 -1.132 0.031 1.357 -1.161 -0.631 0.072 0.453 0.056 0.718 0.104 0.478 1.114 1954 -0.372 0.148 0.562 0.367 -1.757 -0.322 0.139 -0.278 0.229 0.545 -0.219 0.419 1955 -1.083 -1.634 -1.698 0.194 0.282 -0.122 0.571 0.827 0.427 0.307 -1.381 -0.438 1956 -1.434 -2.009 0.707 -0.845 1.499 0.387 -0.172 -0.664 0.018 1.101 -0.161 -0.099 1957 1.940 -1.946 -1.869 0.441 -0.818 -0.502 -0.502 0.074 -0.852 1.091 -1.219 0.946 1958 -1.529 -2.255 -2.580 -0.113 -0.138 -0.932 -0.404 -0.714 0.152 0.828 0.188 -1.411 1959 -2.045 3.066 1.609 0.165 -0.272 -0.016 0.241 -0.795 -0.169 -0.231 -1.250 0.034 1960 -2.581 -1.894 -1.576 -0.170 -0.809 0.252 -0.418 -0.930 -0.244 -1.005 -0.551 -0.051 1961 -1.353 1.112 0.474 -0.138 0.339 1.057 0.161 0.115 0.979 0.232 0.136 -1.680 1962 1.671 0.010 -2.872 1.191 0.086 0.441 -0.708 0.270 0.075 0.300 -0.776 -0.378 1963 -3.206 -1.276 0.918 -0.142 1.070 -0.294 -0.094 -0.553 0.437 1.247 -0.340 -0.616 1964 0.598 -0.399 -0.435 0.604 0.918 0.232 0.768 -1.268 -0.293 0.371 -0.507 -0.253 1965 -1.208 -2.035 -0.832 0.672 -0.020 0.363 -0.216 -0.133 -0.465 0.620 -1.373 0.179 1966 -3.275 -1.237 -1.023 -1.987 1.190 0.595 0.227 -0.879 0.248 -1.129 0.290 -1.350 1967 -0.489 1.573 2.008 1.630 0.043 0.654 0.282 -0.334 0.246 1.253 0.234 -0.403 1968 -0.766 -2.001 2.031 0.377 -0.286 0.443 -0.570 -0.716 -1.143 -1.028 -2.099 -0.853 1969 -3.343 -3.132 -1.542 0.648 -0.560 -0.155 0.439 -0.876 0.018 0.112 0.333 -1.563 1970 -2.729 -1.029 -2.097 0.282 0.501 1.072 0.305 -0.257 0.019 -0.028 0.322 -0.263 1971 -0.528 -1.146 -1.165 -0.626 0.790 -0.557 -0.135 0.932 0.339 1.288 0.539 0.867 1972 -0.072 -0.042 -0.310 0.761 0.067 -0.066 -0.518 -0.142 -1.076 0.323 -0.616 1.308 1973 1.457 1.134 0.697 -1.302 0.071 0.669 0.443 0.308 0.285 0.440 -0.102 0.168 1974 -0.115 -0.579 -0.618 0.482 -0.454 0.057 0.514 -0.360 -0.001 -0.781 -0.350 0.693 1975 1.461 0.374 0.093 0.250 -0.601 -0.178 0.520 0.066 1.272 0.107 0.633 1.508 1976 -0.115 1.716 0.443 0.352 0.032 0.305 -0.183 0.507 -0.713 -0.916 -0.026 -2.026 1977 -4.026 -1.802 0.295 1.383 0.242 0.012 -0.325 -1.266 0.638 0.071 0.525 -0.152 1978 -0.224 -2.779 0.599 -0.920 0.050 0.769 -0.477 -0.354 -0.132 0.892 2.599 -1.000 1979 -2.356 -0.937 -0.902 -1.398 -0.229 0.913 0.074 -0.633 -0.006 -1.087 0.571 1.483 1980 -2.340 -0.574 -1.346 -0.346 -0.994 0.809 -0.388 -0.320 0.343 -0.416 -1.208 0.005 1981 0.197 0.041 -1.540 0.654 0.352 -0.257 0.724 -0.225 -0.994 -1.244 -0.139 -1.011 1982 -1.104 1.083 0.978 1.357 -0.251 -0.943 0.209 0.303 0.598 -0.341 0.689 1.280 1983 1.303 -1.515 -0.496 -0.813 -0.439 0.342 0.197 1.021 -0.035 1.263 -0.524 0.314 1984 0.599 -0.234 -2.258 -0.343 0.539 0.158 0.112 0.468 -0.343 -0.273 -0.886 0.669 1985 -2.812 -1.763 0.527 0.527 -0.317 -0.233 -0.252 -0.039 0.017 0.970 -1.239 -1.832 1986 -0.654 -2.511 2.206 0.097 0.344 0.715 0.084 -0.766 0.011 1.427 0.988 0.400 1987 -1.061 -1.337 -1.623 0.462 0.383 -0.520 -0.317 -0.968 0.119 0.035 -0.621 -0.475 1988 0.383 -0.836 -0.315 -0.494 -0.796 0.220 0.004 0.177 0.973 0.195 0.061 2.002 1989 3.056 3.512 1.339 -0.437 0.731 0.310 0.842 0.411 0.589 0.779 -0.097 -0.432 1990 0.701 3.122 3.064 1.611 0.865 0.129 -0.358 -0.306 -0.385 0.505 0.087 1.408 1991 0.401 -0.800 -0.780 0.421 0.388 -0.181 -0.206 0.639 -0.093 -0.290 0.464 1.889 1992 0.811 1.342 1.033 -0.793 1.209 -0.229 0.205 0.365 -0.730 -0.283 0.753 1.896 1993 3.428 0.648 0.851 -0.417 -1.574 -0.528 -0.500 -0.458 -0.341 -0.357 1.177 -0.041 1994 -0.585 -0.854 1.685 0.087 -0.139 1.534 0.504 0.790 -0.023 0.221 1.656 1.141 1995 -0.142 1.503 0.145 -1.019 -0.915 0.013 -0.083 0.391 -0.335 0.123 -0.692 -1.736 1996 -1.231 0.369 -1.495 -1.614 -0.387 0.413 0.752 0.024 -1.247 0.094 0.095 -1.641 1997 -0.460 2.134 0.812 0.151 -1.168 -0.811 -0.397 0.010 0.182 -0.785 -0.551 0.145 1998 -2.270 0.115 -0.243 -0.150 0.323 -0.873 -0.364 0.342 -1.050 0.162 -1.585 1.497 1999 -0.119 0.605 -1.693 0.176 0.156 0.934 0.142 -0.572 0.172 0.001 0.772 1.133 2000 0.878 1.502 -0.275 -0.354 0.818 0.673 -0.421 0.149 0.532 0.454 -1.441 -2.150 2001 -0.835 -0.353 -1.780 0.889 0.397 -0.007 0.105 0.366 -0.621 0.656 0.994 -1.204 2002 1.252 1.247 0.863 0.370 0.252 0.732 0.537 -0.137 0.136 -1.350 -1.200 -1.248 2003 -0.291 0.360 0.938 -0.208 0.746 -0.213 -0.093 -0.478 0.441 -0.690 0.378 0.676 2004 -1.986 -1.259 0.264 -0.328 -0.221 -0.327 -0.149 -0.600 0.895 -0.342 0.911 1.240 2005 0.249 -1.053 -1.366 -0.008 -0.772 -0.200 0.032 0.048 0.819 0.123 0.120 -1.874 2006 -0.391 -0.010 -1.703 -0.148 0.073 1.046 0.175 -0.389 0.617 -1.041 0.189 2.487 2007 2.017 -1.201 1.052 0.601 0.780 -0.561 -0.295 -0.092 0.176 0.349 -0.444 0.924 2008 0.539 1.122 0.337 -0.758 -1.371 -0.167 -0.407 -0.123 -0.247 1.543 0.124 0.647 2009 0.699 -0.716 -0.050 0.923 1.093 -1.187 -1.164 -0.136 0.924 -1.414 0.320 -3.293 2010 -2.573 -4.264 -0.479 -0.441 -1.098 0.020 0.382 -0.216 -0.757 -0.490 -0.357 -2.810 2011 -1.795 1.437 1.480 2.059 -0.229 -0.773 -0.426 -1.040 0.561 0.833 1.344 2.201 2012 -0.657 0.241 0.833 -0.158 0.020 -0.685 0.115 -0.085 0.697 -1.592 -0.216 -1.800 -999 AO calculated from the 20CR V2 dataset http://psl.noaa.gov/data/20thC_Rean/timeseries/monthly/AO/ updated to 2012. Data is now normalized using 1981-2010 EOF time-series.