1871 2010 1871 -1.178 -1.493 -0.888 -1.132 -0.188 0.113 0.295 -0.216 -0.449 -0.521 -2.421 -0.803 1872 -0.937 -1.135 -0.807 -0.214 0.324 -0.010 -0.185 -0.260 -0.531 -1.231 -0.915 -0.369 1873 -0.595 -0.781 -0.882 -0.889 -0.241 0.020 0.189 -0.091 -0.554 -1.103 -1.123 0.047 1874 1.031 0.527 0.764 1.157 0.104 0.477 0.463 -0.413 -0.307 0.141 -0.485 -1.003 1875 -0.961 -0.312 0.155 -0.083 1.186 1.441 -0.276 -0.014 -0.547 -1.326 -2.457 -0.946 1876 0.204 -0.214 -0.700 -0.482 0.116 0.541 0.835 -0.495 -1.987 -1.289 -2.985 -1.944 1877 -0.360 -0.801 -0.399 -1.586 -1.022 -0.074 -0.068 -1.038 -1.042 -0.616 -0.193 -0.800 1878 -0.706 -0.703 -0.791 -1.178 0.024 -0.085 0.754 -0.639 0.241 -1.243 -2.173 -2.351 1879 -1.635 -0.784 0.797 -0.220 0.108 0.096 -0.324 -0.296 0.494 -0.213 -0.979 0.783 1880 -0.511 0.598 0.341 0.703 0.342 0.057 -0.409 -0.346 -0.434 -2.023 0.204 -1.295 1881 -2.548 -2.072 -0.875 -0.739 0.150 -0.030 0.572 -0.088 -0.632 -1.156 1.062 0.870 1882 1.623 1.677 1.270 0.050 -0.489 -0.391 0.458 0.001 -0.422 -1.022 -0.960 -2.129 1883 0.222 1.426 -0.318 -0.294 0.200 -0.076 -0.397 0.116 -0.521 0.655 0.408 0.697 1884 1.102 0.287 -0.224 -1.752 -0.370 -0.069 -0.951 -0.643 0.132 0.470 -0.738 0.091 1885 -0.440 -1.948 -0.037 -0.126 -0.531 0.428 -0.645 -1.381 0.264 -0.366 -0.601 1.605 1886 -1.137 -0.271 0.223 0.181 -0.040 0.098 -0.283 0.046 0.354 0.131 0.560 0.277 1887 1.038 1.609 -0.257 -0.568 0.083 -0.688 -0.160 -1.182 -0.677 -0.143 -0.221 -1.108 1888 -1.214 -1.290 -0.393 0.030 -0.382 -0.057 -0.186 -0.402 0.518 -1.046 0.876 0.111 1889 -0.275 0.045 -1.170 0.481 0.063 0.965 -0.632 0.455 -0.475 -1.305 0.183 1.154 1890 0.576 -0.377 0.546 0.366 -0.623 -0.529 0.078 -0.270 -0.009 -0.320 -0.517 -0.189 1891 -1.524 1.565 0.009 -0.929 -0.027 -1.492 -0.373 -0.197 0.556 -0.160 -0.732 0.854 1892 -1.037 -2.219 -1.388 -0.052 -0.239 -0.173 0.200 -0.187 0.974 -0.956 -0.699 -1.518 1893 -2.220 -0.383 0.788 0.754 -0.272 -0.272 -0.313 -0.879 0.827 0.022 -0.091 0.237 1894 0.249 2.736 2.182 0.104 -1.171 0.252 -0.036 -0.481 -0.692 -0.586 0.767 0.893 1895 -2.362 -3.455 -0.112 0.371 0.502 0.122 0.085 -0.930 0.889 -1.134 0.615 -0.463 1896 -0.150 1.516 0.027 0.549 0.206 -0.416 0.099 -0.790 -0.680 -0.800 -0.030 0.595 1897 -1.551 0.599 -0.312 1.310 0.061 -1.195 -0.154 -0.358 0.194 -0.520 0.282 0.244 1898 1.822 -0.861 -1.885 0.478 -0.712 0.065 0.053 0.539 -0.145 -0.629 0.555 1.515 1899 -0.534 -0.887 -0.779 -0.121 -0.379 0.004 -0.079 -0.756 0.445 0.324 0.774 -1.211 1900 -0.357 -2.473 -1.297 1.168 0.564 -0.064 -0.277 0.102 1.160 0.639 0.148 0.348 1901 0.237 -1.867 0.144 0.234 -0.356 0.137 0.023 -0.070 -0.013 0.307 0.022 -1.051 1902 0.174 -1.586 0.131 -0.917 -0.405 -1.362 -0.397 -0.493 0.124 0.338 -0.190 0.923 1903 0.563 2.570 1.745 -0.753 -0.165 -1.318 -0.712 -0.417 -0.217 -0.644 0.470 -0.665 1904 0.872 -0.346 0.213 1.169 0.492 0.252 0.032 -0.700 -0.217 0.423 0.701 0.439 1905 1.837 0.516 0.043 -1.505 0.658 0.270 -0.095 -0.281 0.053 -0.583 0.218 1.230 1906 0.473 0.162 0.733 1.441 -0.908 -0.103 0.048 -0.438 0.220 0.712 -1.397 0.686 1907 0.478 1.175 1.917 0.386 -0.898 -0.045 -0.699 0.078 -0.285 -0.462 -0.161 -0.897 1908 0.925 0.745 0.485 0.191 0.564 0.399 -0.314 -0.067 0.552 -0.095 -0.768 0.044 1909 0.588 0.034 -2.391 0.507 -0.619 -0.094 1.014 0.806 -0.076 0.222 -0.304 -0.966 1910 1.892 1.569 0.542 0.644 -0.145 -0.023 -0.348 -0.925 -0.203 0.630 -2.159 -0.416 1911 1.254 2.563 0.715 1.162 1.015 -0.005 -0.283 -0.899 0.259 0.032 0.686 0.515 1912 -0.512 -1.213 0.954 1.192 0.423 -0.068 -0.203 -1.067 -0.567 0.077 0.687 1.377 1913 0.660 0.545 3.069 1.221 0.476 0.529 -0.155 -0.136 -0.539 -0.031 1.907 0.634 1914 1.118 0.696 -0.061 1.390 1.533 0.572 -0.269 -0.263 0.517 -0.168 0.655 1.696 1915 -1.735 -1.118 -2.388 1.509 -0.843 -0.489 -0.710 -0.919 -0.801 -0.361 -0.970 -0.928 1916 2.571 1.038 -2.330 0.171 -0.244 -0.154 0.367 0.176 -0.276 1.349 0.668 -2.701 1917 -0.563 -0.322 0.569 -0.480 -0.210 0.610 -0.069 -0.304 1.542 0.233 0.877 -1.400 1918 -1.158 2.702 2.174 1.025 1.053 0.635 -1.534 0.346 0.561 0.309 -0.054 -0.208 1919 -1.251 -1.353 -0.327 0.908 -0.158 0.680 0.200 0.788 0.774 -0.484 -0.670 0.561 1920 1.312 1.654 3.236 -0.355 0.128 0.018 1.081 0.013 -0.065 -0.306 1.756 -1.157 1921 2.624 1.249 2.293 0.825 0.727 0.589 0.633 0.214 0.645 0.912 -1.016 1.335 1922 -1.071 1.529 0.314 0.195 0.442 0.694 0.290 0.040 0.065 -1.064 -0.148 0.132 1923 1.352 -0.237 0.848 0.025 0.066 0.731 0.484 -0.152 0.626 0.336 -0.924 0.641 1924 -0.880 -0.945 -2.019 -0.771 -0.498 -0.364 0.819 0.421 0.804 0.181 0.649 1.520 1925 2.083 -0.094 -1.223 1.365 -0.270 0.215 0.352 0.148 0.921 -0.169 -0.327 -1.091 1926 0.019 0.076 1.123 0.173 -0.628 -0.485 0.630 0.106 0.102 -1.259 0.058 -0.294 1927 0.407 -0.294 1.054 1.020 -0.281 -0.220 0.373 -0.409 -0.620 -0.385 0.563 -1.629 1928 1.626 1.692 -0.828 0.238 -0.763 -0.182 0.772 -0.425 0.343 0.832 0.241 0.451 1929 -3.639 -1.895 1.060 0.035 0.174 -0.405 0.279 -0.002 0.135 0.980 0.058 0.761 1930 0.920 0.119 0.599 -0.699 0.549 1.053 0.028 -0.490 -1.165 -0.086 0.726 -0.404 1931 -1.681 -0.263 -1.829 -0.001 -0.053 -0.268 0.365 -0.173 0.173 1.015 0.590 1.233 1932 2.019 -0.431 -1.701 -0.341 -0.196 -0.153 0.130 0.222 1.128 0.382 0.573 1.016 1933 0.450 -1.924 -0.658 0.027 0.053 0.595 1.299 0.979 -0.764 -0.357 -0.267 -0.506 1934 1.274 1.304 -0.411 0.105 1.610 0.017 -0.054 -0.340 -0.710 0.753 0.105 -0.374 1935 -0.031 2.460 -0.682 -1.461 -0.467 -0.117 0.916 0.145 -0.143 0.762 -0.490 -2.669 1936 -2.647 -3.318 -0.535 0.158 0.209 0.471 -0.045 0.227 0.076 0.337 0.814 2.416 1937 0.986 0.403 -2.907 0.278 0.502 0.499 -0.200 0.229 0.862 -0.247 -1.170 -2.464 1938 0.546 0.088 2.396 0.680 0.149 0.382 0.351 0.063 0.452 0.383 0.772 -1.898 1939 -1.341 1.464 -0.089 1.006 0.176 -0.134 -0.533 -0.183 -0.225 -0.442 0.128 -0.474 1940 -4.228 -1.516 -1.627 0.002 -0.323 0.082 -0.012 0.410 -0.054 -0.913 0.671 -0.456 1941 -2.483 -2.137 -1.549 -0.962 0.208 0.546 0.218 -0.386 0.093 0.626 -0.240 0.256 1942 -1.175 -3.100 -0.703 -0.161 -0.130 -0.475 0.582 0.254 0.624 -0.346 -0.792 0.324 1943 -1.280 2.281 1.014 2.379 0.677 -0.202 -0.061 -1.106 -0.124 -0.219 -0.382 0.515 1944 0.870 -0.070 -0.638 0.130 0.657 0.010 -0.731 0.655 0.271 0.438 -1.731 -0.399 1945 -2.838 0.586 0.931 0.754 -0.096 -0.021 0.237 0.417 0.132 0.809 -0.610 -2.677 1946 0.135 -0.740 -0.097 1.547 -0.352 0.809 0.645 0.109 -0.041 0.398 0.043 -0.921 1947 -0.385 -5.953 -1.606 2.165 0.222 -0.326 0.457 -0.137 1.096 0.396 -2.905 -1.707 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 http://www.esrl.noaa.gov/psd/data/20thC_Rean/timeseries/monthly/AO/