Open Access
Table 2
Contingency tables between phases of solar cycle (rows) and occurrence/phase of confounding forcings (columns): each entry displays the respective number of months. The last row provides χ2-statistics; asterisks denote their statistical significance at the 5% level.
| SSW |
QBO |
Volcanos |
El Niño |
|||||
|---|---|---|---|---|---|---|---|---|
| No | Yes | E | W | No | Yes | − | + | |
| Solar min | 46 | 16 | 34 | 41 | 72 | 3 | 46 | 29 |
| Solar neutral | 97 | 27 | 57 | 75 | 136 | 14 | 80 | 70 |
| Solar max | 25 | 26 | 32 | 36 | 56 | 19 | 28 | 17 |
| χ 2 | 15.4* | 0.3 | 18.2* | 11.1 | ||||
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