Year Month Day AO index 2010 AUG 1 0.892 2010 AUG 2 1.157 2010 AUG 3 1.293 2010 AUG 4 0.971 2010 AUG 5 0.246 2010 AUG 6 -0.751 2010 AUG 7 -1.107 2010 AUG 8 -0.942 2010 AUG 9 -0.475 2010 AUG 10 -0.382 2010 AUG 11 -0.470 2010 AUG 12 -0.955 2010 AUG 13 -1.516 2010 AUG 14 -1.743 2010 AUG 15 -1.473 2010 AUG 16 -0.573 2010 AUG 17 0.001 2010 AUG 18 -0.086 2010 AUG 19 -0.530 2010 AUG 20 -0.690 2010 AUG 21 -0.404 2010 AUG 22 -0.119 2010 AUG 23 0.111 2010 AUG 24 0.436 2010 AUG 25 0.542 2010 AUG 26 0.479 2010 AUG 27 0.528 2010 AUG 28 0.462 2010 AUG 29 0.413 2010 AUG 30 0.513 2010 AUG 31 0.680 2010 SEP 1 0.492 2010 SEP 2 -0.155 2010 SEP 3 -0.686 2010 SEP 4 -0.653 2010 SEP 5 -0.722 2010 SEP 6 -0.764 2010 SEP 7 -0.779 2010 SEP 8 -0.769 2010 SEP 9 -0.701 2010 SEP 10 -0.705 2010 SEP 11 -0.511 2010 SEP 12 -0.149 2010 SEP 13 -0.125 2010 SEP 14 -0.548 2010 SEP 15 -1.063 2010 SEP 16 -1.266 2010 SEP 17 -1.226 2010 SEP 18 -1.110 2010 SEP 19 -1.441 2010 SEP 20 -2.025 2010 SEP 21 -2.675 2010 SEP 22 -2.737 2010 SEP 23 -2.288 2010 SEP 24 -1.781 2010 SEP 25 -1.464 2010 SEP 26 -0.930 2010 SEP 27 -0.285 2010 SEP 28 0.482 2010 SEP 29 0.910 2010 SEP 30 0.654 2010 OCT 1 -0.021 2010 OCT 2 0.262 2010 OCT 3 0.987 2010 OCT 4 1.708 2010 OCT 5 1.732 2010 OCT 6 1.770 2010 OCT 7 0.191 2010 OCT 8 -1.639 2010 OCT 9 -2.331 2010 OCT 10 -1.992 2010 OCT 11 -1.164 2010 OCT 12 -0.733 2010 OCT 13 -0.325 2010 OCT 14 -0.117 2010 OCT 15 -0.022 2010 OCT 16 -0.165 2010 OCT 17 -0.275 2010 OCT 18 -0.657 2010 OCT 19 -1.132 2010 OCT 20 -1.762 2010 OCT 21 -1.934 2010 OCT 22 -2.170 2010 OCT 23 -2.555 2010 OCT 24 -2.192 2010 OCT 25 -0.946 2010 OCT 26 -0.088 2010 OCT 27 0.360 2010 OCT 28 0.632 2010 OCT 29 0.826 2010 OCT 30 0.003 2010 OCT 31 -0.216 2010 NOV 1 1.291 2010 NOV 2 2.381 2010 NOV 3 2.337 2010 NOV 4 1.654 2010 NOV 5 1.532 2010 NOV 6 2.181 2010 NOV 7 2.807 2010 NOV 8 0.741 2010 NOV 9 -0.768 2010 NOV 10 -1.041 2010 NOV 11 -0.478 2010 NOV 12 0.356 2010 NOV 13 1.507 2010 NOV 14 2.451 2010 NOV 15 2.560 2010 NOV 16 1.719 2010 NOV 17 0.259 2010 NOV 18 -0.805 2010 NOV 19 -1.688 2010 NOV 20 -2.321 2010 NOV 21 -2.390 2010 NOV 22 -2.232 2010 NOV 23 -2.408 2010 NOV 24 -2.705 2010 NOV 25 -3.335 2010 NOV 26 -4.058 2010 NOV 27 -3.935 2010 NOV 28 -2.856 2010 NOV 29 -2.253 2010 NOV 30 -1.377