Fig. 4: Dominant PFIv2 pattern and co-spectrum analyses. | npj Climate and Atmospheric Science

Fig. 4: Dominant PFIv2 pattern and co-spectrum analyses.

From: Arctic Oscillation and Pacific-North American pattern dominated-modulation of fire danger and wildfire occurrence

Fig. 4

March–October dominant pattern of PFIv2 as defined by the first EOF (a, b) computed over the 20°–90°N, 0°-360°. The patterns are displayed as amplitudes by regressing regional NA and Eurasia anomalies upon the standardized first principal component time series. Dotted regions are significant at 95% level. Panels c shows co-spectrum between AO and PFIv2 over NA, d for PNA and PFIv2 over NA, (e) AO and PFIv2 over Eurasia and f PNA and PFIv2 over Eurasia. g–j are the same as c–f but for the coherence squared.

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