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

Figure 3

Correlation coefficients between ECI and the coldness intensity (CI) (a) and frequency of station-based cold days (b) and cold nights (c). The shading indicates areas with significant two-tailed Student’s -test exceeding 0.05 and 0.01.

(a) CI

(b) Cold days

(c) Cold nights