Active regime · NA4

North American regimes (4 + no regime, year-round), nearest centroid (zero centroid = no regime). 0 = no regime, 1 = Pacific Trough, 2 = Pacific Ridge, 3 = Alaskan Ridge, 4 = Greenland High. — Lee, Tippett & Polvani 2023 (J. Climate 36, 7091)