Year Month Day AO index 2008 FEB 1 1.928 2008 FEB 2 2.440 2008 FEB 3 1.862 2008 FEB 4 1.408 2008 FEB 5 1.006 2008 FEB 6 0.804 2008 FEB 7 0.457 2008 FEB 8 0.112 2008 FEB 9 -0.436 2008 FEB 10 -1.334 2008 FEB 11 -1.654 2008 FEB 12 -1.539 2008 FEB 13 -1.463 2008 FEB 14 -1.561 2008 FEB 15 -1.037 2008 FEB 16 -0.162 2008 FEB 17 0.046 2008 FEB 18 0.019 2008 FEB 19 0.737 2008 FEB 20 2.616 2008 FEB 21 4.399 2008 FEB 22 4.590 2008 FEB 23 3.422 2008 FEB 24 2.368 2008 FEB 25 2.177 2008 FEB 26 1.700 2008 FEB 27 1.269 2008 FEB 28 1.154 2008 FEB 29 1.552 2008 MAR 1 1.390 2008 MAR 2 0.765 2008 MAR 3 -0.027 2008 MAR 4 0.113 2008 MAR 5 0.875 2008 MAR 6 1.162 2008 MAR 7 1.071 2008 MAR 8 1.342 2008 MAR 9 1.726 2008 MAR 10 1.794 2008 MAR 11 1.822 2008 MAR 12 1.694 2008 MAR 13 0.736 2008 MAR 14 -0.456 2008 MAR 15 -0.971 2008 MAR 16 -0.665 2008 MAR 17 -0.352 2008 MAR 18 -0.075 2008 MAR 19 0.083 2008 MAR 20 0.125 2008 MAR 21 -0.503 2008 MAR 22 -0.571 2008 MAR 23 0.394 2008 MAR 24 1.198 2008 MAR 25 1.312 2008 MAR 26 1.082 2008 MAR 27 0.939 2008 MAR 28 0.754 2008 MAR 29 0.483 2008 MAR 30 0.146 2008 MAR 31 0.119 2008 APR 1 0.007 2008 APR 2 -0.597 2008 APR 3 -0.950 2008 APR 4 -0.873 2008 APR 5 -1.417 2008 APR 6 -2.142 2008 APR 7 -2.258 2008 APR 8 -1.558 2008 APR 9 -0.969 2008 APR 10 -0.946 2008 APR 11 -1.114 2008 APR 12 -1.390 2008 APR 13 -0.946 2008 APR 14 0.505 2008 APR 15 1.770 2008 APR 16 2.313 2008 APR 17 1.836 2008 APR 18 0.482 2008 APR 19 -0.449 2008 APR 20 -0.596 2008 APR 21 -0.435 2008 APR 22 -0.470 2008 APR 23 -0.356 2008 APR 24 0.141 2008 APR 25 0.444 2008 APR 26 0.326 2008 APR 27 0.206 2008 APR 28 -0.414 2008 APR 29 -1.266 2008 APR 30 -2.053 2008 MAY 1 -2.528 2008 MAY 2 -2.926 2008 MAY 3 -2.663 2008 MAY 4 -1.824 2008 MAY 5 -1.591 2008 MAY 6 -1.475 2008 MAY 7 -1.676 2008 MAY 8 -1.826 2008 MAY 9 -1.632 2008 MAY 10 -1.192 2008 MAY 11 -1.020 2008 MAY 12 -1.298 2008 MAY 13 -1.510 2008 MAY 14 -1.412 2008 MAY 15 -0.806 2008 MAY 16 -0.923 2008 MAY 17 -1.698 2008 MAY 18 -1.701 2008 MAY 19 -1.529 2008 MAY 20 -1.328 2008 MAY 21 -0.957 2008 MAY 22 -1.134 2008 MAY 23 -1.698 2008 MAY 24 -1.406 2008 MAY 25 -0.355 2008 MAY 26 0.239 2008 MAY 27 0.317 2008 MAY 28 0.122 2008 MAY 29 0.460 2008 MAY 30 0.546 2008 MAY 31 0.403