1871 2012 1871 -1.315 -1.622 -1.033 -1.270 -0.353 -0.061 0.117 -0.381 -0.606 -0.677 -2.524 -0.951 1872 -1.081 -1.274 -0.955 -0.379 0.144 -0.180 -0.350 -0.423 -0.686 -1.366 -1.059 -0.529 1873 -0.749 -0.929 -1.027 -1.034 -0.404 -0.151 0.014 -0.259 -0.708 -1.243 -1.262 -0.124 1874 0.832 0.342 0.572 0.954 -0.069 0.294 0.280 -0.572 -0.469 -0.033 -0.642 -1.145 1875 -1.104 -0.473 -0.020 -0.251 0.982 1.230 -0.439 -0.184 -0.702 -1.459 -2.559 -1.090 1876 0.028 -0.378 -0.850 -0.639 -0.058 0.356 0.641 -0.651 -2.102 -1.423 -3.071 -2.059 1877 -0.520 -0.949 -0.558 -1.712 -1.163 -0.242 -0.236 -1.179 -1.183 -0.769 -0.358 -0.948 1878 -0.857 -0.854 -0.939 -1.315 -0.147 -0.253 0.562 -0.792 0.064 -1.379 -2.282 -2.455 1879 -1.759 -0.932 0.604 -0.384 -0.065 -0.077 -0.485 -0.458 0.310 -0.377 -1.122 0.591 1880 -0.667 0.411 0.162 0.513 0.163 -0.114 -0.568 -0.507 -0.593 -2.136 0.028 -1.429 1881 -2.647 -2.185 -1.021 -0.888 -0.024 -0.199 0.386 -0.256 -0.784 -1.293 0.862 0.676 1882 1.407 1.460 1.064 -0.122 -0.645 -0.551 0.275 -0.170 -0.580 -1.163 -1.104 -2.240 1883 0.046 1.216 -0.479 -0.456 0.024 -0.244 -0.556 -0.057 -0.677 0.467 0.226 0.507 1884 0.901 0.109 -0.388 -1.873 -0.530 -0.237 -1.094 -0.795 -0.042 0.286 -0.887 -0.082 1885 -0.598 -2.064 -0.206 -0.293 -0.687 0.245 -0.797 -1.512 0.086 -0.526 -0.755 1.390 1886 -1.275 -0.433 0.047 0.006 -0.209 -0.075 -0.446 -0.125 0.173 -0.043 0.374 0.099 1887 0.839 1.394 -0.420 -0.722 -0.090 -0.839 -0.326 -1.319 -0.828 -0.310 -0.385 -1.248 1888 -1.350 -1.424 -0.552 -0.141 -0.542 -0.226 -0.351 -0.561 0.333 -1.187 0.681 -0.063 1889 -0.438 -0.126 -1.308 0.297 -0.109 0.767 -0.784 0.273 -0.632 -1.439 0.008 0.952 1890 0.390 -0.537 0.360 0.185 -0.775 -0.685 -0.094 -0.433 -0.179 -0.481 -0.672 -0.354 1891 -1.652 1.351 -0.162 -1.074 -0.196 -1.621 -0.533 -0.362 0.370 -0.325 -0.882 0.660 1892 -1.178 -2.327 -1.519 -0.221 -0.402 -0.338 0.025 -0.352 0.777 -1.099 -0.849 -1.646 1893 -2.329 -0.543 0.596 0.563 -0.435 -0.434 -0.475 -1.025 0.634 -0.149 -0.258 0.060 1894 0.072 2.489 1.951 -0.069 -1.308 0.074 -0.205 -0.638 -0.843 -0.739 0.575 0.698 1895 -2.466 -3.529 -0.279 0.191 0.318 -0.052 -0.087 -1.074 0.694 -1.273 0.427 -0.620 1896 -0.316 1.304 -0.144 0.364 0.030 -0.575 -0.074 -0.939 -0.832 -0.948 -0.199 0.408 1897 -1.678 0.412 -0.473 1.103 -0.111 -1.332 -0.320 -0.518 0.018 -0.675 0.104 0.067 1898 1.601 -1.007 -2.003 0.294 -0.862 -0.107 -0.119 0.354 -0.311 -0.782 0.369 1.303 1899 -0.689 -1.032 -0.928 -0.288 -0.538 -0.166 -0.247 -0.905 0.262 0.145 0.582 -1.347 1900 -0.518 -2.574 -1.431 0.965 0.378 -0.233 -0.439 -0.071 0.958 0.451 -0.026 0.168 1901 0.060 -1.985 -0.031 0.057 -0.517 -0.037 -0.147 -0.239 -0.183 0.128 -0.149 -1.192 1902 -0.001 -1.711 -0.042 -1.062 -0.564 -1.494 -0.556 -0.650 -0.050 0.158 -0.355 0.727 1903 0.377 2.328 1.526 -0.903 -0.331 -1.452 -0.862 -0.576 -0.381 -0.797 0.286 -0.816 1904 0.678 -0.507 0.037 0.966 0.308 0.075 -0.139 -0.851 -0.381 0.241 0.511 0.257 1905 1.615 0.331 -0.128 -1.633 0.469 0.092 -0.262 -0.444 -0.119 -0.737 0.041 1.025 1906 0.289 -0.013 0.542 1.230 -1.053 -0.270 -0.124 -0.596 0.044 0.522 -1.528 0.497 1907 0.294 0.972 1.693 0.205 -1.043 -0.214 -0.850 -0.094 -0.447 -0.619 -0.327 -1.043 1908 0.729 0.554 0.301 0.015 0.378 0.218 -0.476 -0.235 0.366 -0.263 -0.916 -0.128 1909 0.401 -0.137 -2.495 0.323 -0.772 -0.261 0.815 0.613 -0.244 0.046 -0.465 -1.109 1910 1.669 1.355 0.357 0.455 -0.311 -0.192 -0.509 -1.069 -0.367 0.442 -2.269 -0.575 1911 1.049 2.321 0.525 0.959 0.816 -0.176 -0.445 -1.045 0.081 -0.139 0.496 0.330 1912 -0.667 -1.350 0.757 0.988 0.241 -0.237 -0.368 -1.207 -0.721 -0.096 0.498 1.168 1913 0.471 0.360 2.813 1.016 0.293 0.344 -0.321 -0.302 -0.694 -0.200 1.683 0.446 1914 0.916 0.506 -0.229 1.181 1.320 0.385 -0.431 -0.426 0.332 -0.333 0.467 1.478 1915 -1.857 -1.257 -2.492 1.297 -0.990 -0.645 -0.861 -1.063 -0.949 -0.521 -1.113 -1.072 1916 2.329 0.838 -2.435 -0.004 -0.407 -0.320 0.186 0.001 -0.439 1.141 0.479 -2.796 1917 -0.718 -0.483 0.382 -0.636 -0.374 0.422 -0.237 -0.466 1.328 0.057 0.682 -1.531 1918 -1.296 2.456 1.943 0.826 0.853 0.447 -1.661 0.167 0.376 0.130 -0.222 -0.372 1919 -1.387 -1.485 -0.488 0.713 -0.324 0.490 0.024 0.596 0.582 -0.641 -0.822 0.375 1920 1.105 1.438 2.975 -0.515 -0.046 -0.153 0.880 -0.158 -0.233 -0.468 1.537 -1.295 1921 2.380 1.043 2.059 0.632 0.536 0.403 0.445 0.037 0.457 0.716 -1.158 1.128 1922 -1.212 1.316 0.135 0.019 0.259 0.504 0.111 -0.131 -0.107 -1.204 -0.314 -0.042 1923 1.144 -0.401 0.655 -0.146 -0.106 0.540 0.300 -0.318 0.439 0.157 -1.068 0.453 1924 -1.025 -1.088 -2.133 -0.919 -0.654 -0.524 0.626 0.239 0.611 0.006 0.461 1.307 1925 1.855 -0.261 -1.359 1.157 -0.433 0.039 0.171 -0.027 0.725 -0.335 -0.488 -1.231 1926 -0.152 -0.096 0.921 -0.002 -0.781 -0.642 0.442 -0.068 -0.071 -1.394 -0.113 -0.456 1927 0.225 -0.456 0.854 0.821 -0.444 -0.384 0.192 -0.567 -0.773 -0.545 0.377 -1.754 1928 1.410 1.474 -0.975 0.061 -0.912 -0.348 0.580 -0.584 0.164 0.638 0.064 0.268 1929 -3.707 -2.012 0.860 -0.136 -0.001 -0.564 0.101 -0.172 -0.039 0.782 -0.114 0.570 1930 0.724 -0.055 0.412 -0.849 0.363 0.854 -0.143 -0.647 -1.303 -0.254 0.535 -0.563 1931 -1.804 -0.426 -1.948 -0.172 -0.222 -0.431 0.185 -0.339 -0.002 0.817 0.403 1.028 1932 1.792 -0.589 -1.824 -0.502 -0.361 -0.319 -0.044 0.045 0.926 0.201 0.387 0.817 1933 0.267 -2.040 -0.809 -0.144 -0.118 0.408 1.092 0.782 -0.912 -0.517 -0.430 -0.662 1934 1.069 1.097 -0.570 -0.068 1.395 -0.154 -0.222 -0.501 -0.860 0.562 -0.068 -0.534 1935 -0.200 2.221 -0.833 -1.591 -0.624 -0.284 0.720 -0.030 -0.309 0.571 -0.646 -2.765 1936 -2.744 -3.395 -0.690 -0.017 0.033 0.288 -0.214 0.050 -0.096 0.158 0.621 2.178 1937 0.788 0.221 -2.995 0.100 0.317 0.315 -0.365 0.052 0.668 -0.410 -1.307 -2.565 1938 0.361 -0.085 2.159 0.491 -0.026 0.201 0.171 -0.109 0.269 0.203 0.580 -2.015 1939 -1.474 1.253 -0.257 0.808 0.001 -0.300 -0.688 -0.349 -0.389 -0.600 -0.046 -0.631 1940 -4.280 -1.644 -1.752 -0.168 -0.484 -0.090 -0.182 0.229 -0.223 -1.058 0.482 -0.614 1941 -2.584 -2.247 -1.675 -1.105 0.032 0.361 0.042 -0.546 -0.080 0.438 -0.404 0.079 1942 -1.313 -3.183 -0.854 -0.327 -0.297 -0.632 0.395 0.077 0.436 -0.507 -0.940 0.145 1943 -1.414 2.047 0.815 2.142 0.487 -0.367 -0.229 -1.245 -0.291 -0.383 -0.541 0.331 1944 0.676 -0.239 -0.790 -0.044 0.468 -0.160 -0.880 0.466 0.093 0.256 -1.853 -0.558 1945 -2.928 0.399 0.735 0.562 -0.264 -0.191 0.060 0.235 -0.042 0.616 -0.763 -2.773 1946 -0.039 -0.890 -0.264 1.333 -0.513 0.617 0.456 -0.064 -0.210 0.217 -0.128 -1.065 1947 -0.544 -5.957 -1.732 1.934 0.045 -0.487 0.274 -0.304 0.895 0.215 -2.994 -1.829 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://www.esrl.noaa.gov/psd/data/20thC_Rean/timeseries/monthly/AO/ updated to 2012. Data is now normalized using 1981-2010 EOF time-series.