The Role of Rossby-Wave Propagation in a North American Extreme Cold Event

<div>Time series of the vertical component of the EPF for waves 1–4 (curves; 10<sup>5</sup> m<sup>2</sup> s<sup>−2</sup>) over 45°–75°N at 100 hPa from December 2013 to February 2014.</div>

Advances in Meteorology

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Figure 4

Figure 4: The Role of Rossby-Wave Propagation in a North American Extreme Cold Event 