NAO_INDEX (NCEP1) ** undef = -9.99e+08 year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1948 0.358 0.032 0.705 0.190 0.076 -1.210 -0.278 -1.128 1.139 0.639 -0.521 -0.308 1949 1.057 1.130 -0.024 1.363 0.552 -0.669 0.487 0.107 -0.893 0.683 -0.551 0.504 1950 -0.465 0.829 -0.154 0.190 -1.318 -0.393 -2.135 -1.777 1.315 0.540 -0.148 -0.358 1951 0.604 0.195 -0.835 0.209 -1.460 -1.496 0.865 -1.373 -0.889 0.486 -0.517 1.043 1952 0.849 -0.769 -1.295 -0.073 -1.227 -0.263 0.968 -0.468 -1.324 -0.260 0.972 -0.580 1953 -0.334 -0.284 0.306 -0.887 -0.786 0.368 -1.210 -0.931 -0.144 1.005 -0.119 0.556 1954 -0.380 0.051 -0.496 0.769 -1.285 -0.248 -0.609 -1.143 1.363 1.200 -0.822 0.935 1955 -0.676 -1.202 -1.413 0.392 0.745 -0.665 2.628 1.395 0.404 -1.009 0.455 -0.150 1956 -0.093 -1.593 -0.531 -0.196 1.127 0.634 -1.101 -1.585 -0.544 0.286 0.979 0.203 1957 0.628 -0.139 -1.193 0.934 -0.914 -1.565 -0.676 -0.038 -0.995 1.335 0.249 0.771 1958 0.010 -0.838 -1.758 0.344 0.689 -1.355 -1.741 -1.417 -0.884 0.516 0.467 -0.702 1959 -0.924 0.837 0.009 -0.968 -1.389 0.124 0.502 0.888 -0.303 0.179 -0.594 0.217 1960 -1.404 -1.190 -1.518 0.590 -0.344 0.072 -1.619 -0.820 -0.667 -2.055 -1.907 0.776 1961 0.077 0.968 0.670 -1.582 -0.676 1.639 -0.275 -0.655 0.467 -0.396 0.682 -1.434 1962 0.972 -0.032 -2.193 0.228 -0.520 0.474 -0.866 -1.390 0.189 0.541 1.120 -0.278 1963 -2.150 -1.038 -0.855 -0.903 1.625 -0.579 -0.110 -1.027 1.003 1.412 -1.210 -1.149 1964 -0.959 -0.742 -1.415 -0.364 1.092 0.427 1.683 -0.335 0.489 -0.195 0.273 0.307 1965 -0.068 -2.372 -0.813 0.504 -0.720 0.156 -1.241 -1.069 -0.426 0.038 -0.591 0.197 1966 -1.118 -0.709 0.357 -1.851 1.538 0.315 0.362 -0.698 0.459 -1.429 1.645 1.002 1967 -1.148 0.696 1.546 2.166 0.490 1.372 0.032 -0.419 -0.582 1.309 0.982 0.005 1968 0.320 -0.782 0.913 -1.038 -0.661 -0.153 -0.396 0.424 -1.395 -0.134 -1.196 -0.669 1969 -1.344 -1.489 -1.271 0.160 -0.142 0.373 1.201 0.749 1.403 1.501 0.706 0.438 1970 -1.322 0.150 -0.799 -0.491 0.453 1.217 -0.297 0.570 0.599 -0.239 -0.191 -0.532 1971 -0.283 0.255 -0.495 0.099 0.400 -1.343 0.596 -0.191 0.128 1.387 1.913 0.817 1972 -0.337 -0.116 0.042 0.401 0.731 0.913 0.927 0.763 -1.386 -0.623 -0.015 0.373 1973 -0.256 0.862 0.401 0.358 0.671 1.100 0.302 0.030 -0.271 -0.303 1.123 0.775 1974 0.709 0.267 -0.715 0.426 -0.018 -0.344 -0.430 -1.262 0.952 -1.911 -0.642 1.482 1975 1.271 -0.076 -0.463 0.639 -1.549 0.496 0.692 0.884 1.714 -0.143 0.411 1.079 1976 0.619 0.762 0.542 1.295 1.294 0.448 0.301 2.204 -2.257 0.030 -0.357 -1.080 1977 -0.832 -0.332 -0.482 0.336 -1.147 0.132 0.151 -0.278 0.671 0.500 0.069 -0.509 1978 0.930 -1.091 0.724 -1.159 -0.238 1.105 -1.149 0.630 0.885 0.515 -0.070 -2.360 1979 -0.808 -0.400 0.182 -0.648 1.387 0.991 0.312 -0.800 1.355 -0.119 -0.059 0.526 1980 -1.082 0.163 -0.703 1.669 -1.552 -0.301 -1.127 -0.218 0.852 -0.176 -0.024 1.095 1981 0.701 0.423 -0.795 1.200 0.932 -0.162 0.485 1.604 -0.756 -0.401 0.571 -0.806 1982 -0.527 0.726 0.715 1.734 0.776 -1.941 1.580 -0.809 2.135 0.497 -0.856 1.228 1983 1.958 -1.001 0.974 -1.203 0.621 1.261 2.104 2.026 0.155 1.185 0.314 0.323 1984 1.915 0.549 -0.832 0.934 -0.367 0.166 0.188 1.328 -0.371 1.233 -1.761 0.578 1985 -1.434 -0.440 -0.174 -0.207 -0.798 -0.647 -0.340 -1.953 0.731 0.958 -0.502 -0.621 1986 0.820 -1.640 1.499 -0.913 1.803 1.019 0.637 -0.640 -0.232 2.383 -1.035 0.703 1987 -1.334 -0.320 -0.017 0.662 -1.333 -1.689 0.855 0.540 0.983 0.113 0.412 -0.869 1988 0.842 -0.105 0.083 0.003 0.278 1.955 -1.797 -1.262 0.528 -0.451 0.419 1.200 1989 1.245 2.004 1.481 -1.206 0.533 0.332 2.191 -0.700 1.179 0.772 0.045 -1.090 1990 1.099 2.097 1.898 1.611 -1.664 -0.486 0.262 0.422 0.310 0.278 0.220 0.906 1991 0.356 -0.030 -0.654 0.630 -1.816 -1.249 0.037 0.531 0.205 -0.777 -0.041 1.019 1992 -0.353 1.263 1.084 -0.219 0.844 1.064 0.409 -2.464 -0.236 -2.162 -1.256 0.789 1993 1.929 0.119 0.790 -0.280 -0.685 -0.897 -1.284 0.370 -1.644 -1.889 -0.862 1.058 1994 1.103 -0.089 2.161 -0.570 0.304 1.329 0.520 -0.298 -0.287 -0.133 -0.763 0.874 1995 1.109 1.453 1.170 0.506 -0.488 0.509 0.191 2.052 -0.724 0.909 0.481 -1.192 1996 -1.304 -0.244 -1.415 -0.941 -0.182 0.390 1.216 0.216 -1.211 0.695 0.392 -1.212 1997 -0.809 2.075 0.980 1.478 -0.675 -1.418 0.436 0.336 0.429 -0.937 -1.487 -0.720 1998 -0.521 0.822 0.918 -2.345 -1.145 -1.705 -0.855 0.444 -1.818 0.569 -0.254 0.286 1999 0.643 0.437 -0.409 -0.412 0.533 0.956 0.354 -0.077 0.008 0.171 0.999 0.818 2000 0.135 1.627 0.398 -1.422 0.658 -0.107 -0.178 0.297 -0.302 0.880 -0.810 -1.516 2001 -0.269 -0.143 -1.007 -0.156 -0.984 -0.844 0.100 -0.818 -1.512 0.179 1.792 -0.889 2002 0.308 1.319 0.251 0.181 0.423 -0.694 0.054 1.012 -2.029 -0.740 -1.676 -1.177 2003 0.023 0.352 0.086 -0.109 1.338 -1.151 -0.431 1.145 0.138 -1.788 -1.038 0.422 2004 -0.183 -0.653 -0.068 -0.187 -0.473 -1.010 -0.556 -0.502 0.478 -1.516 1.727 1.681 2005 0.503 -1.412 -1.897 -0.581 -0.019 -0.734 0.189 0.207 1.081 0.376 0.749 -0.088 2006 -0.002 -0.971 -1.390 0.668 0.528 1.502 0.869 0.974 -0.768 -0.933 -0.371 0.458 2007 0.745 -0.335 0.772 1.725 1.319 -1.673 -2.024 0.770 0.303 0.760 1.886 0.547 2008 0.903 0.774 0.254 -1.485 -1.403 -1.293 -1.169 -1.105 -0.618 0.805 1.645 0.442 2009 0.219 -0.618 0.472 -0.226 1.229 -0.921 -2.925 -1.226 1.114 -0.045 -1.493 -2.116 2010 -1.605 -1.794 -0.983 0.295 -2.200 -0.370 -0.168 0.487 -1.455 -0.503 -0.107 -1.897 2011 -0.878 0.732 0.620 1.929 1.154 -1.443 -0.910 -0.815 0.868 1.053 -1.231 1.830 2012 0.506 -0.056 0.267 -0.613 -0.725 -2.629 -1.030 -0.688 0.714 -1.492 -0.277 -0.755 2013 -0.218 -0.783 -2.339 -0.347 0.536 0.555 1.078 0.266 -0.255 -0.091 1.131 0.698 2014 0.153 0.654 0.739 0.306 -0.066 -0.951 0.086 -1.018 -0.149 0.165 -1.058 1.374 2015 1.461 0.861 1.314 1.027 1.875 -0.340 -2.357 -0.988 -1.395 0.168 -0.167 0.482 2016 0.084 0.720 -0.082 -1.218 -0.341 -0.771 -0.886 0.140 0.714 -0.793 1.114 0.470 2017 -0.194 0.097 0.277 1.542 -1.311 -0.396 -0.155 -0.369 -1.021 0.167 0.968 0.433 2018 0.886 0.013 -1.360 -0.913 1.012 1.011 1.199 -0.049 1.263 0.734 -1.536 -0.330 2019 -0.140 0.209 1.403 -1.075 -1.438 -1.619 -1.026 -1.091 -0.260 -0.672 -0.500 -0.092 2020 1.128 2.021 0.864 0.431 -0.471 0.087 -0.302 -0.137 1.363 -1.231 0.175 -0.423 2021 -1.201 -0.325 0.229 0.259 0.627 0.953 0.143 1.046 0.004 -0.108 1.622 -0.727 2022 0.482 1.591 -0.123 -0.365 0.341 0.146 1.216 0.992 -2.428 0.121 -2.027 -1.501 2023 0.452 0.333 -0.975 -1.099 -0.683 -0.155 -2.287 0.071 0.288 -0.329 -0.672 0.267 2024 0.077 0.815 -0.775 -0.549 -0.311 0.386 -0.219 -1.364 -1.621 0.193 0.611 1.061 2025 -0.288 0.117 -0.260***************************************************************