Fig. 7: WAF and meridional wind anomalies at 300 hPa after the peak day of NEP MHWs.

Composite meridional wind anomalies (shading; unit: m s–1), and WAF (vectors; unit: m2 s–2) at 300 hPa at lags of a 6, b 8, c 10, and d 12 days relative to the peak day. Stippling indicates statistically significant (p < 0.1) meridional wind anomalies based on a two-tailed Student’s t-test. The magenta boxes indicate the MHW study area.