Fig. 6: Lead–lag regression of 300-hPa SF on the daily NPO index and the WAF calculated based on the regressed SF anomalies.
From: Part I observational study on a new mechanism for North Pacific Oscillation influencing the tropics
a 300 hPa WAF (unit: m2 s−2) and SF (unit: 106 m2 s−1) anomalies with 10-day leading the NPO index; b the same as (a) but for −5-day lead; c simultaneous regressed stream function anomalies and calculated WAF; d–f 300 hPa WAF and SF anomalies from +5 to +15 day, respectively. The area with black arrows shows the WAF magnitudes larger than 0.1 m2 s−2.
