Recent Intensified Winter Coldness in the Mid-High Latitudes of Eurasia and Its Relationship with Daily Extreme Low Temperature Variability

Table 1

Correlation coefficients between all the indices studied. Note that the bold (asterisks) numbers and asterisks indicate significant difference exceeding 0.05 (0.01) for the two-tailed Student’s -test.

	AO	ZPC1	ZPC2	ZPC1 + ZPC2
ECI	−0.45	0.41	0.38	0.55