* and ** indicate significance at the 95 and 99% confidence level based on Student’s t test, respectively.
January | February | March | April | May | June | |
Niño 3.4 | 0.13 | 0.14 | 0.13 | 0.11 | 0.06 | 0.10 |
AO | 0.10 | 0.43 | 0.46* | −0.07 | 0.16 | −0.08 |
850-hPa geopotential height | 0.06 | 0.60** | 0.77** | 0.21 | 0.11 | 0.09 |
Temperature | 0.08 | 0.41 | 0.54* | 0.46* | −0.37 | −0.19 |
Precipitation | −0.18 | −0.40 | −0.32 | −0.27 | −0.14 | −0.08 |
Potential evapotranspiration | 0.14 | 0.28 | 0.56** | 0.50* | −0.08 | −0.11 |