NAO_INDEX (ERA20C) ** undef = -9.99e+08 year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1900 0.572 -0.486 -1.223 0.087 0.498 -0.600 0.100 0.013 0.308 0.051 -0.918 0.574 1901 -0.023 -1.630 -0.801 -0.165 1.542 -0.450 0.678 0.620 -0.903 -0.073 0.967 -0.391 1902 0.081 -0.542 -0.070 -0.969 0.549 -1.092 0.507 0.286 -1.217 0.315 -1.130 0.316 1903 0.214 0.787 0.952 0.026 0.719 -1.143 -0.535 -1.610 -1.392 -0.357 1.113 -0.420 1904 0.660 0.525 -0.021 0.390 -0.418 -0.996 -0.524 -0.401 -0.960 0.122 0.991 -0.304 1905 0.784 0.043 0.394 -0.261 0.644 -0.133 0.252 -0.661 0.517 -1.605 -0.460 0.397 1906 0.514 0.589 0.636 1.294 0.874 -0.303 -0.347 0.042 -0.451 0.061 0.278 0.894 1907 0.167 0.601 0.940 -0.328 0.995 -0.288 -0.412 0.242 -0.258 -0.810 0.442 -0.061 1908 0.182 0.371 -0.227 -0.344 -0.502 1.052 0.605 0.633 -0.006 -0.161 0.160 0.192 1909 0.467 -0.206 -0.974 -1.044 0.944 -0.600 0.029 0.752 -1.445 0.475 0.300 -0.737 1910 1.018 0.867 0.228 0.265 0.587 -1.186 -0.729 -0.616 -0.888 -0.800 -0.385 -0.362 1911 0.186 0.882 -0.162 0.469 0.211 -0.083 0.294 -0.104 0.010 -1.042 -1.384 -0.004 1912 -0.342 -0.446 0.063 1.202 -0.439 -0.788 -0.168 -1.697 -1.317 -0.136 1.002 0.525 1913 -0.049 0.192 0.791 -0.441 0.202 0.468 0.735 1.000 -1.559 -0.604 -0.334 0.644 1914 -0.493 0.478 -0.632 0.694 -0.613 0.794 -1.090 0.212 -0.354 -0.392 0.345 -0.333 1915 -0.008 -0.022 -1.003 0.987 1.112 -0.874 -0.890 0.165 -1.752 -0.466 -0.024 -0.919 1916 1.020 0.771 -2.594 0.325 0.906 -0.239 -0.126 0.651 -0.952 0.680 -1.391 -1.152 1917 -1.323 -0.640 -0.515 -0.515 0.694 -0.491 -0.471 -0.369 1.185 0.502 0.800 0.088 1918 -0.793 0.728 0.066 0.242 0.473 0.368 -0.370 0.082 0.079 0.405 -0.262 -0.551 1919 -0.584 -0.820 -0.666 0.382 1.203 0.496 -0.121 0.012 -0.217 -1.231 -0.602 0.335 1920 1.415 1.031 1.570 -0.961 -0.805 -0.965 0.137 1.067 -0.301 -1.082 -0.607 -0.842 1921 0.671 -0.046 1.315 0.634 -0.023 0.308 -0.119 -0.218 0.108 0.230 -0.274 0.881 1922 -0.227 0.687 -0.436 -0.729 0.099 0.380 -0.784 -0.431 -0.454 -1.625 1.017 -0.001 1923 0.577 0.128 -0.395 -1.162 -0.125 -0.106 -0.133 -0.555 0.820 0.385 0.372 0.798 1924 -0.246 -0.686 -1.645 -1.164 -0.257 -0.656 -0.559 -0.240 0.733 -0.123 -0.238 0.248 1925 0.669 0.452 -0.953 0.298 -0.085 -0.218 -0.034 0.221 -0.422 -0.641 0.095 -0.860 1926 -0.109 0.042 -0.289 -1.318 0.898 -1.250 0.136 0.547 0.469 -0.425 -0.981 0.183 1927 0.660 -0.059 0.224 1.379 1.383 -0.161 -0.452 -0.914 -0.547 0.037 0.213 -1.542 1928 1.283 1.122 -1.052 -1.705 1.783 -1.289 0.668 -0.730 -0.377 -0.029 -0.688 0.194 1929 -1.731 -0.690 -0.875 -0.374 0.149 -0.937 -0.198 0.263 0.537 0.527 -0.896 -0.013 1930 0.413 -0.429 -0.535 -0.820 0.028 0.200 -1.057 -0.512 -1.890 -0.363 0.048 0.350 1931 -0.071 0.140 -1.280 0.246 0.413 -0.373 -0.729 -0.041 -1.431 0.036 -1.467 0.310 1932 0.838 -1.966 -1.375 0.215 0.866 -0.409 -0.380 1.014 0.534 -0.249 0.416 0.196 1933 0.510 -0.820 -0.419 0.166 0.941 0.078 0.340 0.372 -1.398 -1.174 0.506 -0.818 1934 0.801 -0.381 0.323 -0.847 -0.951 -0.778 -0.258 -0.171 -0.664 0.181 0.855 -1.087 1935 -0.244 1.261 -0.621 -0.797 2.066 -0.191 1.158 0.409 -0.131 0.490 -0.898 -0.806 1936 -0.815 -1.119 -0.672 -0.746 0.881 0.043 -1.542 1.306 -1.263 -0.079 0.490 0.899 1937 0.289 0.255 -1.217 -0.086 -0.417 0.808 0.070 0.884 -0.005 -0.101 -0.027 -0.986 1938 0.748 -0.402 0.641 1.711 -0.095 -0.204 0.058 0.925 -0.475 0.630 -0.889 -0.423 1939 -0.729 0.684 -0.236 -0.340 1.363 -0.414 -1.526 0.647 -2.059 -1.078 -0.525 -0.221 1940 -1.344 -0.714 -0.704 0.031 0.460 -0.110 -0.533 1.666 -0.450 -0.726 -0.501 0.138 1941 -1.395 -0.512 -0.803 -1.103 0.387 0.158 0.564 -0.185 -1.252 -0.570 -0.653 0.363 1942 -0.159 -1.896 -0.883 -0.832 -0.014 -0.510 0.059 0.087 0.540 0.639 1.141 0.081 1943 -0.344 1.101 0.137 1.958 0.666 -0.085 0.200 -0.884 0.076 0.372 1.337 0.398 1944 0.858 -0.627 -0.469 0.142 -0.300 -0.580 -1.195 0.382 0.070 -0.167 0.043 0.281 1945 -1.053 1.003 -0.312 0.338 0.000 -0.093 -0.103 0.684 -0.138 -0.869 0.310 -0.850 1946 0.215 -0.451 -0.603 1.855 1.438 0.118 0.463 -0.793 -0.308 -1.151 -0.195 0.078 1947 -0.274 -1.376 -0.714 0.700 0.025 -0.585 0.063 1.788 0.834 -0.138 -0.086 -0.418 1948 0.505 0.092 0.789 0.779 -0.195 -0.722 -0.377 -0.756 0.532 0.626 -0.190 -0.009 1949 1.041 0.968 -0.099 1.746 -0.207 -0.459 0.463 0.624 -0.732 0.628 -0.503 0.437 1950 -0.462 0.705 -0.301 0.782 1.287 -0.186 -1.364 -1.379 1.414 0.531 -0.289 -0.244 1951 0.665 0.150 -0.806 0.479 1.318 -1.339 0.761 -1.076 -0.667 0.493 -0.554 0.911 1952 0.640 -0.788 -1.115 0.174 1.185 -0.284 0.813 -0.238 -1.061 -0.131 0.523 -0.387 1953 -0.313 -0.160 0.298 -0.694 0.750 -0.126 -0.357 -0.672 0.035 0.810 -0.016 0.532 1954 -0.320 0.158 -0.201 0.577 1.075 -0.214 0.116 -0.677 1.326 1.057 -0.678 0.775 1955 -0.640 -1.167 -1.133 0.199 -0.697 -0.376 1.910 1.397 0.438 -0.754 0.276 -0.034 1956 -0.034 -1.309 -0.336 -0.210 -1.267 0.865 -0.403 -1.135 -0.225 0.316 0.822 0.203 1957 0.683 -0.002 -0.968 0.534 0.692 -1.092 -0.716 0.022 -0.781 1.510 0.062 0.724 1958 0.199 -0.678 -1.395 0.479 -0.703 -1.215 -1.188 -1.245 -0.616 0.516 0.431 -0.571 1959 -0.720 0.908 0.326 -0.708 1.025 0.191 0.443 0.703 -0.482 0.085 -0.682 0.290 1960 -1.266 -0.965 -1.161 0.309 0.314 0.100 -0.753 -1.001 -0.341 -1.635 -1.810 0.771 1961 0.107 0.933 0.631 -1.294 0.656 1.127 -0.205 -0.347 0.537 -0.356 0.542 -1.126 1962 0.988 0.012 -1.838 0.412 0.568 0.272 -0.683 -1.015 0.334 0.444 0.804 -0.267 1963 -1.930 -0.917 -0.423 -0.769 -1.662 -0.567 0.228 -0.911 0.863 1.186 -1.035 -0.951 1964 -0.828 -0.642 -1.029 -0.145 -0.875 0.542 1.678 -0.525 0.455 -0.105 0.358 0.272 1965 0.024 -2.081 -0.445 0.575 0.625 0.382 -0.879 -0.821 -0.119 -0.147 -0.886 0.258 1966 -0.849 -0.432 0.285 -1.639 -1.223 0.277 0.109 -0.708 0.351 -1.169 1.365 0.854 1967 -0.938 0.716 1.445 1.791 -0.397 1.094 0.218 -0.192 -0.395 1.344 0.867 -0.008 1968 0.240 -0.696 0.808 -0.949 0.413 0.100 -0.654 0.332 -1.072 -0.088 -1.195 -0.563 1969 -1.212 -1.273 -0.920 0.327 0.230 0.158 0.780 0.398 1.044 1.225 0.543 0.285 1970 -1.072 0.016 -0.784 -0.240 -0.559 0.771 -0.055 0.545 0.422 -0.250 -0.214 -0.542 1971 -0.120 0.096 -0.486 -0.174 -0.464 -1.326 0.328 0.194 -0.002 1.176 1.788 0.646 1972 -0.378 -0.083 -0.027 0.455 -0.469 0.686 0.547 0.844 -1.219 -0.464 0.101 0.295 1973 -0.296 0.714 0.334 -0.068 -0.596 1.118 0.348 0.175 -0.164 -0.296 1.011 0.690 1974 0.591 0.221 -0.570 0.082 0.150 -0.313 -0.081 -1.179 1.119 -1.615 -0.596 1.315 1975 1.123 -0.083 -0.346 0.530 1.282 0.549 0.670 0.763 1.699 -0.422 0.409 0.923 1976 0.493 0.707 0.459 1.029 -1.133 0.460 0.282 2.278 -1.715 -0.009 -0.193 -1.028 1977 -0.818 -0.354 -0.404 0.610 1.001 -0.074 -0.063 -0.437 0.313 0.324 0.064 -0.477 1978 0.818 -0.962 0.703 -1.279 0.026 0.915 -1.084 0.365 0.638 0.456 0.313 -2.059 1979 -0.690 -0.223 0.151 -0.768 -1.411 0.879 0.122 -0.788 1.144 -0.151 0.035 0.477 1980 -1.072 0.179 -0.623 1.356 1.405 -0.369 -0.803 -0.257 0.731 -0.086 -0.071 0.919 1981 0.611 0.360 -0.592 0.719 -0.770 0.023 0.471 1.377 -0.534 -0.258 0.587 -0.641 1982 -0.381 0.665 0.602 1.442 -0.628 -1.300 1.281 -0.596 1.917 0.375 -0.646 1.102 1983 1.713 -0.771 0.827 -0.615 -0.447 1.171 1.401 1.834 0.183 1.045 0.317 0.258 1984 1.697 0.497 -0.750 0.595 -0.037 -0.044 0.185 1.006 -0.164 0.967 -1.649 0.428 1985 -1.337 -0.450 -0.118 -0.090 0.699 -0.405 -0.464 -1.675 0.520 0.674 -0.525 -0.644 1986 0.708 -1.471 1.446 -0.540 -1.511 0.792 0.439 -0.931 -0.298 2.157 -0.675 0.593 1987 -1.252 -0.352 -0.067 0.558 1.000 -1.225 0.549 0.317 0.792 0.242 0.441 -0.735 1988 0.797 -0.184 0.128 -0.005 -0.145 1.330 -1.300 -1.108 0.478 -0.375 0.354 1.068 1989 1.092 1.702 1.218 -0.924 -0.625 0.458 1.602 -0.329 0.997 0.635 -0.089 -0.950 1990 0.977 1.865 1.675 1.872 1.374 -0.518 0.195 0.185 0.182 0.310 0.211 0.800 1991 0.261 -0.007 -0.544 0.852 1.283 -0.644 -0.004 0.840 0.074 -0.580 0.033 0.877 1992 -0.303 1.062 0.907 -0.040 -0.907 0.521 0.549 -1.564 -0.262 -1.888 -0.806 0.704 1993 1.667 0.008 0.654 -0.077 0.793 -0.747 -1.116 0.200 -1.235 -1.689 -0.608 0.886 1994 0.915 -0.112 1.796 -0.255 -0.051 1.334 0.417 0.027 -0.017 -0.003 -0.515 0.803 1995 0.959 1.187 0.982 0.084 0.524 0.201 0.147 1.733 -0.427 0.706 0.199 -0.984 1996 -1.042 -0.235 -1.209 -1.137 0.141 0.378 1.193 0.384 -0.996 0.505 0.372 -1.118 1997 -0.612 1.759 0.853 1.124 0.674 -1.294 0.256 0.517 0.263 -0.848 -1.454 -0.586 1998 -0.447 0.748 0.690 -1.820 0.762 -1.285 -0.690 0.275 -1.606 0.454 -0.264 0.247 1999 0.542 0.276 -0.538 -0.458 -0.390 0.939 0.077 -0.079 0.154 -0.004 0.919 0.770 2000 0.126 1.385 0.249 -1.117 -0.619 0.006 -0.086 0.320 -0.218 0.778 -0.902 -1.212 2001 -0.191 -0.165 -0.740 0.071 0.839 -0.515 0.395 -0.695 -1.418 0.110 1.790 -0.828 2002 0.329 1.167 0.210 0.204 -0.135 -0.507 0.098 0.770 -1.809 -0.843 -1.579 -1.038 2003 0.035 0.318 0.067 -0.319 -1.174 -0.797 -0.248 0.731 0.029 -1.580 -0.908 0.406 2004 -0.183 -0.604 -0.131 -0.264 0.438 -0.516 -0.160 -0.445 0.190 -1.279 1.564 1.512 2005 0.410 -1.296 -1.664 -0.470 0.051 -0.636 -0.140 0.286 0.874 0.326 0.544 -0.134 2006 0.027 -0.886 -1.222 0.724 -0.246 1.160 0.533 0.805 -0.728 -0.912 -0.159 0.551 2007 0.718 -0.223 0.748 1.329 -1.313 -1.473 -1.341 0.532 0.259 0.686 1.629 0.495 2008 0.869 0.696 0.270 -1.435 1.375 -0.981 -1.053 -0.942 -0.358 0.888 1.418 0.393 2009 0.236 -0.537 0.358 -0.016 -1.063 -0.742 -2.425 -1.111 0.895 -0.101 -1.274 -1.822 2010 -1.334 -1.517 -0.797 0.084 1.907 -0.441 -0.066 0.164 -1.261 -0.459 -0.275 -1.605