This study investigates projected changes in summer stationary waves over Northwestern North America using data from the Coupled Model Intercomparison Project Phase 6 (CMIP6). Findings reveal a significant 95% increase in summer stationary wave amplitude under a high-emission scenario (2080–2099) compared to 1995–2014. This increase is primarily driven by diabatic heating changes over the tropical Pacific, enhancing wave activity flux into Northwestern North America. The study concludes that this amplified heat-dome-like stationary wave anomaly will likely heighten heatwave risk in the region.

Ziming Chen, Jian Lu, Chuan-Chieh Chang, Sandro W. Lubis, L. Ruby Leung