The British–Okhotsk Corridor Pattern and Its Linkage to the Silk Road Pattern

Abstract Based on observation and reanalysis datasets, numerical experiments with a simple dynamical model, climate model outputs, this study investigates the second leading waveguide teleconnection along summer polar front jet (PFJ) over Eurasia interannual time scale, British–Okhotsk Corridor (BOC) pattern. The BOC pattern explains 20.8% of total variance northern Eurasia, which is only slightly lower than first teleconnection, British–Baikal It consists four zonally oriented action centers British Isles, western Russia, Siberia, Sea Okhotsk. primarily confined to leads wavelike temperature precipitation anomalies its routine. Besides, it occasionally coupled dominant subtropical (STJ), Silk Road (SRP). A bifurcated appears when coupling strong, two branches waves PFJ STJ, respectively. fluctuations BOC–SRP linkage play profound role in shaping variability modes Eurasia. Numerical suggest that basic flow cannot directly influence by affecting propagation condition Rossby waves. Nevertheless, can indirectly changing exciting locations through modulating wave–mean interaction at exit Atlantic stream. INMCM4.0 reproduce observed time-varying characteristics, supporting proposed mechanism. Significance Statement Over extreme weather events are often related long-lasting stagnant atmospheric circulation upper troposphere, be well determined few recurring called teleconnections. Atmospheric teleconnections usually propagate (STJ) (PFJ). Although STJ have been understood, currently not fully understood. This paper pattern, newly defined major PFJ. STJ. Fluctuations surface Observation output used understand study.