1948 2010 1948 0.436 0.731 2.547 1.104 -0.410 -0.455 -0.137 -0.025 0.374 1.173 0.664 0.852 1949 1.860 1.826 -0.592 1.523 -0.297 -0.393 0.035 -0.018 -0.321 1.096 -1.239 -0.435 1950 -0.126 0.775 0.097 0.547 0.276 0.781 -0.368 -0.557 0.757 0.120 -0.571 -1.578 1951 -0.038 -0.137 -2.037 -0.674 -0.653 -0.572 0.413 -0.165 -0.635 0.293 0.475 2.482 1952 0.382 -1.725 -1.916 0.896 -0.404 0.031 0.801 0.188 -0.154 -0.222 -1.699 -1.391 1953 -0.989 0.207 1.572 -1.019 -0.474 0.249 0.641 0.233 0.913 0.282 0.667 1.321 1954 -0.207 0.328 0.753 0.552 -1.633 -0.157 0.318 -0.111 0.411 0.735 -0.051 0.606 1955 -0.939 -1.506 -1.571 0.374 0.465 0.050 0.763 1.025 0.615 0.491 -1.246 -0.276 1956 -1.300 -1.892 0.902 -0.694 1.717 0.573 -0.001 -0.508 0.194 1.308 0.010 0.074 1957 2.171 -1.827 -1.748 0.629 -0.666 -0.342 -0.341 0.251 -0.702 1.297 -1.079 1.149 1958 -1.398 -2.145 -2.479 0.059 0.034 -0.784 -0.240 -0.560 0.332 1.027 0.368 -1.276 1959 -1.929 3.329 1.831 0.344 -0.105 0.158 0.423 -0.642 0.002 -0.063 -1.110 0.210 1960 -2.480 -1.774 -1.447 0.000 -0.657 0.434 -0.255 -0.782 -0.076 -0.859 -0.391 0.122 1961 -1.217 1.319 0.663 0.034 0.524 1.263 0.340 0.293 1.183 0.414 0.315 -1.553 1962 1.894 0.186 -2.779 1.400 0.264 0.629 -0.553 0.452 0.252 0.484 -0.623 -0.213 1963 -3.123 -1.138 1.119 0.029 1.276 -0.127 0.078 -0.394 0.624 1.458 -0.175 -0.458 1964 0.790 -0.235 -0.272 0.797 1.120 0.414 0.965 -1.129 -0.126 0.557 -0.347 -0.085 1965 -1.067 -1.918 -0.680 0.866 0.155 0.548 -0.047 0.039 -0.303 0.813 -1.238 0.359 1966 -3.194 -1.098 -0.877 -1.869 1.400 0.787 0.409 -0.729 0.430 -0.986 0.474 -1.214 1967 -0.328 1.793 2.241 1.852 0.219 0.847 0.465 -0.169 0.429 1.464 0.415 -0.239 1968 -0.613 -1.883 2.265 0.562 -0.119 0.631 -0.411 -0.561 -1.001 -0.882 -1.985 -0.703 1969 -3.264 -3.047 -1.411 0.841 -0.401 0.016 0.626 -0.726 0.193 0.290 0.517 -1.433 1970 -2.632 -0.883 -1.983 0.465 0.691 1.278 0.489 -0.089 0.195 0.146 0.507 -0.096 1971 -0.368 -1.003 -1.024 -0.469 0.988 -0.398 0.036 1.134 0.524 1.500 0.730 1.067 1972 0.102 0.131 -0.144 0.958 0.244 0.107 -0.357 0.029 -0.931 0.508 -0.458 1.521 1973 1.674 1.342 0.892 -1.164 0.249 0.864 0.631 0.492 0.468 0.628 0.070 0.348 1974 0.057 -0.420 -0.460 0.671 -0.292 0.234 0.704 -0.195 0.174 -0.628 -0.185 0.888 1975 1.678 0.559 0.271 0.433 -0.443 -0.008 0.710 0.244 1.484 0.285 0.826 1.727 1976 0.056 1.941 0.631 0.538 0.208 0.489 -0.013 0.697 -0.559 -0.767 0.148 -1.909 1977 -3.967 -1.679 0.479 1.598 0.424 0.188 -0.159 -1.127 0.831 0.248 0.715 0.018 1978 -0.055 -2.684 0.791 -0.771 0.227 0.966 -0.315 -0.189 0.039 1.093 2.849 -0.853 1979 -2.248 -0.789 -0.753 -1.263 -0.060 1.115 0.252 -0.477 0.169 -0.944 0.762 1.701 1980 -2.232 -0.416 -1.209 -0.181 -0.847 1.007 -0.224 -0.154 0.528 -0.252 -1.067 0.180 1981 0.378 0.217 -1.409 0.848 0.538 -0.090 0.920 -0.057 -0.847 -1.105 0.032 -0.865 1982 -0.961 1.289 1.181 1.571 -0.083 -0.795 0.390 0.486 0.790 -0.176 0.884 1.492 1983 1.516 -1.383 -0.335 -0.661 -0.276 0.527 0.378 1.225 0.139 1.475 -0.364 0.498 1984 0.791 -0.066 -2.148 -0.177 0.729 0.338 0.290 0.656 -0.178 -0.106 -0.737 0.863 1985 -2.718 -1.639 0.717 0.717 -0.151 -0.065 -0.084 0.135 0.193 1.173 -1.099 -1.710 1986 -0.498 -2.408 2.445 0.275 0.529 0.911 0.261 -0.613 0.186 1.643 1.191 0.587 1987 -0.916 -1.200 -1.494 0.650 0.569 -0.359 -0.151 -0.821 0.297 0.211 -0.464 -0.314 1988 0.569 -0.685 -0.149 -0.334 -0.644 0.401 0.179 0.357 1.176 0.375 0.238 2.235 1989 3.319 3.788 1.553 -0.275 0.927 0.494 1.041 0.598 0.781 0.976 0.075 -0.269 1990 0.896 3.387 3.328 1.833 1.065 0.308 -0.193 -0.140 -0.221 0.695 0.265 1.623 1991 0.588 -0.648 -0.627 0.608 0.574 -0.011 -0.037 0.833 0.080 -0.123 0.652 2.119 1992 1.009 1.555 1.237 -0.640 1.419 -0.061 0.386 0.551 -0.575 -0.116 0.950 2.126 1993 3.702 0.841 1.051 -0.254 -1.444 -0.368 -0.339 -0.296 -0.176 -0.192 1.386 0.133 1994 -0.427 -0.703 1.908 0.265 0.032 1.753 0.693 0.988 0.151 0.402 1.879 1.349 1995 0.030 1.722 0.324 -0.873 -0.767 0.189 0.090 0.577 -0.170 0.302 -0.536 -1.611 1996 -1.092 0.555 -1.363 -1.486 -0.223 0.600 0.949 0.200 -1.108 0.272 0.273 -1.513 1997 -0.298 2.371 1.011 0.330 -1.026 -0.660 -0.233 0.186 0.362 -0.632 -0.392 0.324 1998 -2.160 0.293 -0.075 0.021 0.507 -0.723 -0.200 0.527 -0.905 0.342 -1.455 1.715 1999 0.052 0.798 -1.566 0.356 0.335 1.136 0.322 -0.413 0.352 0.176 0.969 1.341 2000 1.078 1.720 -0.108 -0.189 1.017 0.867 -0.258 0.329 0.723 0.642 -1.308 -2.037 2001 -0.684 -0.188 -1.656 1.090 0.583 0.168 0.283 0.552 -0.464 0.850 1.198 -1.064 2002 1.464 1.458 1.063 0.556 0.435 0.928 0.727 0.035 0.315 -1.214 -1.060 -1.109 2003 -0.124 0.546 1.141 -0.039 0.943 -0.044 0.079 -0.317 0.629 -0.534 0.564 0.871 2004 -1.868 -1.121 0.447 -0.162 -0.052 -0.162 0.021 -0.442 1.096 -0.176 1.112 1.451 2005 0.432 -0.909 -1.230 0.167 -0.620 -0.030 0.208 0.225 1.018 0.302 0.298 -1.753 2006 -0.227 0.165 -1.577 0.023 0.250 1.252 0.356 -0.225 0.810 -0.896 0.369 2.733 2007 2.250 -1.060 1.258 0.793 0.978 -0.403 -0.128 0.081 0.356 0.534 -0.281 1.125 2008 0.730 1.330 0.521 -0.605 -1.235 0.003 -0.243 0.048 -0.079 1.763 0.303 0.840 2009 0.894 -0.561 0.124 1.125 1.300 -1.046 -1.022 0.035 1.126 -1.280 0.504 -3.212 2010 -2.472 -4.212 -0.318 -0.278 -0.954 0.196 0.568 -0.047 -0.604 -0.329 -0.192 -2.715 -999. AO calculated from the 20CR V2 dataset 1981-2010 base period http://www.esrl.noaa.gov/psd/data/20thC_Rean/timeseries/monthly/AO/